It turned out that DEBUG_SLAB_LEAK is still broken even after recent
recue efforts that when there is a large number of objects like
kmemleak_object which is normal on a debug kernel,
# grep kmemleak /proc/slabinfo
kmemleak_object 2243606 3436210 ...
reading /proc/slab_allocators could easily loop forever while processing
the kmemleak_object cache and any additional freeing or allocating
objects will trigger a reprocessing. To make a situation worse,
soft-lockups could easily happen in this sitatuion which will call
printk() to allocate more kmemleak objects to guarantee an infinite
loop.
Also, since it seems no one had noticed when it was totally broken
more than 2-year ago - see the commit fcf88917dd ("slab: fix a crash
by reading /proc/slab_allocators"), probably nobody cares about it
anymore due to the decline of the SLAB. Just remove it entirely.
Suggested-by: Vlastimil Babka <vbabka@suse.cz>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Qian Cai <cai@lca.pw>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Patch series "init: Do not select DEBUG_KERNEL by default", v5.
CONFIG_DEBUG_KERNEL has been designed to just enable Kconfig options.
Kernel code generatoin should not depend on CONFIG_DEBUG_KERNEL.
Proposed alternative plan: let's add a new symbol, something like
DEBUG_MISC ("Miscellaneous debug code that should be under a more
specific debug option but isn't"), make it depend on DEBUG_KERNEL and be
"default DEBUG_KERNEL" but allow itself to be turned off, and then
mechanically change the small handful of "#ifdef CONFIG_DEBUG_KERNEL" to
"#ifdef CONFIG_DEBUG_MISC".
This patch (of 5):
Introduce DEBUG_MISC ("Miscellaneous debug code that should be under a
more specific debug option but isn't"), make it depend on DEBUG_KERNEL
and be "default DEBUG_KERNEL" but allow itself to be turned off, and
then mechanically change the small handful of "#ifdef
CONFIG_DEBUG_KERNEL" to "#ifdef CONFIG_DEBUG_MISC".
Link: http://lkml.kernel.org/r/20190413224438.10802-2-okaya@kernel.org
Signed-off-by: Sinan Kaya <okaya@kernel.org>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: Anders Roxell <anders.roxell@linaro.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: Chris Zankel <chris@zankel.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Florian Westphal <fw@strlen.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Thomas Bogendoerfer <tbogendoerfer@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This is a lot more appropriate than PI_LIST, which in the kernel one
would assume that it has to do with priority-inheritance; which is not
-- furthermore futexes make use of plists so this can be even more
confusing, albeit the debug nature of the config option.
Link: http://lkml.kernel.org/r/20190317185434.1626-1-dave@stgolabs.net
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit 60a3cdd063 ("x86: add optimized inlining") introduced
CONFIG_OPTIMIZE_INLINING, but it has been available only for x86.
The idea is obviously arch-agnostic. This commit moves the config entry
from arch/x86/Kconfig.debug to lib/Kconfig.debug so that all
architectures can benefit from it.
This can make a huge difference in kernel image size especially when
CONFIG_OPTIMIZE_FOR_SIZE is enabled.
For example, I got 3.5% smaller arm64 kernel for v5.1-rc1.
dec file
18983424 arch/arm64/boot/Image.before
18321920 arch/arm64/boot/Image.after
This also slightly improves the "Kernel hacking" Kconfig menu as
e61aca5158 ("Merge branch 'kconfig-diet' from Dave Hansen') suggested;
this config option would be a good fit in the "compiler option" menu.
Link: http://lkml.kernel.org/r/20190423034959.13525-12-yamada.masahiro@socionext.com
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Borislav Petkov <bp@suse.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Boris Brezillon <bbrezillon@kernel.org>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Marek Vasut <marek.vasut@gmail.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Malaterre <malat@debian.org>
Cc: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Richard Weinberger <richard@nod.at>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Stefan Agner <stefan@agner.ch>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull networking updates from David Miller:
"Highlights:
1) Support AES128-CCM ciphers in kTLS, from Vakul Garg.
2) Add fib_sync_mem to control the amount of dirty memory we allow to
queue up between synchronize RCU calls, from David Ahern.
3) Make flow classifier more lockless, from Vlad Buslov.
4) Add PHY downshift support to aquantia driver, from Heiner
Kallweit.
5) Add SKB cache for TCP rx and tx, from Eric Dumazet. This reduces
contention on SLAB spinlocks in heavy RPC workloads.
6) Partial GSO offload support in XFRM, from Boris Pismenny.
7) Add fast link down support to ethtool, from Heiner Kallweit.
8) Use siphash for IP ID generator, from Eric Dumazet.
9) Pull nexthops even further out from ipv4/ipv6 routes and FIB
entries, from David Ahern.
10) Move skb->xmit_more into a per-cpu variable, from Florian
Westphal.
11) Improve eBPF verifier speed and increase maximum program size,
from Alexei Starovoitov.
12) Eliminate per-bucket spinlocks in rhashtable, and instead use bit
spinlocks. From Neil Brown.
13) Allow tunneling with GUE encap in ipvs, from Jacky Hu.
14) Improve link partner cap detection in generic PHY code, from
Heiner Kallweit.
15) Add layer 2 encap support to bpf_skb_adjust_room(), from Alan
Maguire.
16) Remove SKB list implementation assumptions in SCTP, your's truly.
17) Various cleanups, optimizations, and simplifications in r8169
driver. From Heiner Kallweit.
18) Add memory accounting on TX and RX path of SCTP, from Xin Long.
19) Switch PHY drivers over to use dynamic featue detection, from
Heiner Kallweit.
20) Support flow steering without masking in dpaa2-eth, from Ioana
Ciocoi.
21) Implement ndo_get_devlink_port in netdevsim driver, from Jiri
Pirko.
22) Increase the strict parsing of current and future netlink
attributes, also export such policies to userspace. From Johannes
Berg.
23) Allow DSA tag drivers to be modular, from Andrew Lunn.
24) Remove legacy DSA probing support, also from Andrew Lunn.
25) Allow ll_temac driver to be used on non-x86 platforms, from Esben
Haabendal.
26) Add a generic tracepoint for TX queue timeouts to ease debugging,
from Cong Wang.
27) More indirect call optimizations, from Paolo Abeni"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1763 commits)
cxgb4: Fix error path in cxgb4_init_module
net: phy: improve pause mode reporting in phy_print_status
dt-bindings: net: Fix a typo in the phy-mode list for ethernet bindings
net: macb: Change interrupt and napi enable order in open
net: ll_temac: Improve error message on error IRQ
net/sched: remove block pointer from common offload structure
net: ethernet: support of_get_mac_address new ERR_PTR error
net: usb: smsc: fix warning reported by kbuild test robot
staging: octeon-ethernet: Fix of_get_mac_address ERR_PTR check
net: dsa: support of_get_mac_address new ERR_PTR error
net: dsa: sja1105: Fix status initialization in sja1105_get_ethtool_stats
vrf: sit mtu should not be updated when vrf netdev is the link
net: dsa: Fix error cleanup path in dsa_init_module
l2tp: Fix possible NULL pointer dereference
taprio: add null check on sched_nest to avoid potential null pointer dereference
net: mvpp2: cls: fix less than zero check on a u32 variable
net_sched: sch_fq: handle non connected flows
net_sched: sch_fq: do not assume EDT packets are ordered
net: hns3: use devm_kcalloc when allocating desc_cb
net: hns3: some cleanup for struct hns3_enet_ring
...
-----BEGIN PGP SIGNATURE-----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=Ot0g
-----END PGP SIGNATURE-----
Merge tag 'for-5.2/block-20190507' of git://git.kernel.dk/linux-block
Pull block updates from Jens Axboe:
"Nothing major in this series, just fixes and improvements all over the
map. This contains:
- Series of fixes for sed-opal (David, Jonas)
- Fixes and performance tweaks for BFQ (via Paolo)
- Set of fixes for bcache (via Coly)
- Set of fixes for md (via Song)
- Enabling multi-page for passthrough requests (Ming)
- Queue release fix series (Ming)
- Device notification improvements (Martin)
- Propagate underlying device rotational status in loop (Holger)
- Removal of mtip32xx trim support, which has been disabled for years
(Christoph)
- Improvement and cleanup of nvme command handling (Christoph)
- Add block SPDX tags (Christoph)
- Cleanup/hardening of bio/bvec iteration (Christoph)
- A few NVMe pull requests (Christoph)
- Removal of CONFIG_LBDAF (Christoph)
- Various little fixes here and there"
* tag 'for-5.2/block-20190507' of git://git.kernel.dk/linux-block: (164 commits)
block: fix mismerge in bvec_advance
block: don't drain in-progress dispatch in blk_cleanup_queue()
blk-mq: move cancel of hctx->run_work into blk_mq_hw_sysfs_release
blk-mq: always free hctx after request queue is freed
blk-mq: split blk_mq_alloc_and_init_hctx into two parts
blk-mq: free hw queue's resource in hctx's release handler
blk-mq: move cancel of requeue_work into blk_mq_release
blk-mq: grab .q_usage_counter when queuing request from plug code path
block: fix function name in comment
nvmet: protect discovery change log event list iteration
nvme: mark nvme_core_init and nvme_core_exit static
nvme: move command size checks to the core
nvme-fabrics: check more command sizes
nvme-pci: check more command sizes
nvme-pci: remove an unneeded variable initialization
nvme-pci: unquiesce admin queue on shutdown
nvme-pci: shutdown on timeout during deletion
nvme-pci: fix psdt field for single segment sgls
nvme-multipath: don't print ANA group state by default
nvme-multipath: split bios with the ns_head bio_set before submitting
...
This Kselftest update for Linux 5.2-rc1 consists of
- fixes to seccomp test, and kselftest framework
- cleanups to remove duplicate header defines
- fixes to efivarfs "make clean" target
- cgroup cleanup path
- Moving the IMA kexec_load selftest to selftests/kexec work from
Mimi Johar and Petr Vorel
- A framework to kselftest for writing kernel test modules addition
from Tobin C. Harding
-----BEGIN PGP SIGNATURE-----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=pNRO
-----END PGP SIGNATURE-----
Merge tag 'linux-kselftest-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull Kselftest updates from Shuah Khan:
- fixes to seccomp test, and kselftest framework
- cleanups to remove duplicate header defines
- fixes to efivarfs "make clean" target
- cgroup cleanup path
- Moving the IMA kexec_load selftest to selftests/kexec work from Mimi
Johar and Petr Vorel
- A framework to kselftest for writing kernel test modules addition
from Tobin C. Harding
* tag 'linux-kselftest-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (29 commits)
selftests: build and run gpio when output directory is the src dir
selftests/ipc: Fix msgque compiler warnings
selftests/efivarfs: clean up test files from test_create*()
selftests: fix headers_install circular dependency
selftests/kexec: update get_secureboot_mode
selftests/kexec: make kexec_load test independent of IMA being enabled
selftests/kexec: check kexec_load and kexec_file_load are enabled
selftests/kexec: Add missing '=y' to config options
selftests/kexec: kexec_file_load syscall test
selftests/kexec: define "require_root_privileges"
selftests/kexec: define common logging functions
selftests/kexec: define a set of common functions
selftests/kexec: cleanup the kexec selftest
selftests/kexec: move the IMA kexec_load selftest to selftests/kexec
selftests/harness: Add 30 second timeout per test
selftests/seccomp: Handle namespace failures gracefully
selftests: cgroup: fix cleanup path in test_memcg_subtree_control()
selftests: efivarfs: remove the test_create_read file if it was exist
rseq/selftests: Adapt number of threads to the number of detected cpus
lib: Add test module for strscpy_pad
...
If CONFIG_TEST_KMOD is set to M, while CONFIG_BLOCK is not set, XFS and
BTRFS can not be compiled successly.
Link: http://lkml.kernel.org/r/20190410075434.35220-1-yuehaibing@huawei.com
Fixes: d9c6a72d6f ("kmod: add test driver to stress test the module loader")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reported-by: Hulk Robot <hulkci@huawei.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Joe Lawrence <joe.lawrence@redhat.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-----BEGIN PGP SIGNATURE-----
iQFSBAABCAA8FiEEq68RxlopcLEwq+PEeb4+QwBBGIYFAly8rGYeHHRvcnZhbGRz
QGxpbnV4LWZvdW5kYXRpb24ub3JnAAoJEHm+PkMAQRiGmZMH/1IRB0E1Qmzz8yzw
wj79UuRGYPqxDDSWW+wNc8sU4Ic7iYirn9APHAztCdQqsjmzU/OVLfSa3JhdBe5w
THo7pbGKBqEDcWnKfNk/21jXFNLZ1vr9BoQv2DGU2MMhHAyo/NZbalo2YVtpQPmM
OCRth5n+LzvH7rGrX7RYgWu24G9l3NMfgtaDAXBNXesCGFAjVRrdkU5CBAaabvtU
4GWh/nnutndOOLdByL3x+VZ3H3fIBnbNjcIGCglvvqzk7h3hrfGEl4UCULldTxcM
IFsfMUhSw1ENy7F6DHGbKIG90cdCJcrQ8J/ziEzjj/KLGALluutfFhVvr6YCM2J6
2RgU8CY=
=CfY1
-----END PGP SIGNATURE-----
Merge tag 'v5.1-rc6' into for-5.2/block
Pull in v5.1-rc6 to resolve two conflicts. One is in BFQ, in just a
comment, and is trivial. The other one is a conflict due to a later fix
in the bio multi-page work, and needs a bit more care.
* tag 'v5.1-rc6': (770 commits)
Linux 5.1-rc6
block: make sure that bvec length can't be overflow
block: kill all_q_node in request_queue
x86/cpu/intel: Lower the "ENERGY_PERF_BIAS: Set to normal" message's log priority
coredump: fix race condition between mmget_not_zero()/get_task_mm() and core dumping
mm/kmemleak.c: fix unused-function warning
init: initialize jump labels before command line option parsing
kernel/watchdog_hld.c: hard lockup message should end with a newline
kcov: improve CONFIG_ARCH_HAS_KCOV help text
mm: fix inactive list balancing between NUMA nodes and cgroups
mm/hotplug: treat CMA pages as unmovable
proc: fixup proc-pid-vm test
proc: fix map_files test on F29
mm/vmstat.c: fix /proc/vmstat format for CONFIG_DEBUG_TLBFLUSH=y CONFIG_SMP=n
mm/memory_hotplug: do not unlock after failing to take the device_hotplug_lock
mm: swapoff: shmem_unuse() stop eviction without igrab()
mm: swapoff: take notice of completion sooner
mm: swapoff: remove too limiting SWAP_UNUSE_MAX_TRIES
mm: swapoff: shmem_find_swap_entries() filter out other types
slab: store tagged freelist for off-slab slabmgmt
...
Signed-off-by: Jens Axboe <axboe@kernel.dk>
The help text for CONFIG_ARCH_HAS_KCOV is stale, and describes the
feature as being enabled only for x86_64, when it is now enabled for
several architectures, including arm, arm64, powerpc, and s390.
Let's remove that stale help text, and update it along the lines of hat
for ARCH_HAS_FORTIFY_SOURCE, better describing when an architecture
should select CONFIG_ARCH_HAS_KCOV.
Link: http://lkml.kernel.org/r/20190412102733.5154-1-mark.rutland@arm.com
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add a test module for the new strscpy_pad() function. Tie it into the
kselftest infrastructure for lib/ tests.
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Tobin C. Harding <tobin@kernel.org>
Signed-off-by: Shuah Khan <shuah@kernel.org>
Currently support for 64-bit sector_t and blkcnt_t is optional on 32-bit
architectures. These types are required to support block device and/or
file sizes larger than 2 TiB, and have generally defaulted to on for
a long time. Enabling the option only increases the i386 tinyconfig
size by 145 bytes, and many data structures already always use
64-bit values for their in-core and on-disk data structures anyway,
so there should not be a large change in dynamic memory usage either.
Dropping this option removes a somewhat weird non-default config that
has cause various bugs or compiler warnings when actually used.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This patch adds new config option to trigger generation of BTF type
information from DWARF debuginfo for vmlinux and kernel modules through
pahole, which in turn relies on libbpf for btf_dedup() algorithm.
The intent is to record compact type information of all types used
inside kernel, including all the structs/unions/typedefs/etc. This
enables BPF's compile-once-run-everywhere ([0]) approach, in which
tracing programs that are inspecting kernel's internal data (e.g.,
struct task_struct) can be compiled on a system running some kernel
version, but would be possible to run on other kernel versions (and
configurations) without recompilation, even if the layout of structs
changed and/or some of the fields were added, removed, or renamed.
This is only possible if BPF loader can get kernel type info to adjust
all the offsets correctly. This patch is a first time in this direction,
making sure that BTF type info is part of Linux kernel image in
non-loadable ELF section.
BTF deduplication ([1]) algorithm typically provides 100x savings
compared to DWARF data, so resulting .BTF section is not big as is
typically about 2MB in size.
[0] http://vger.kernel.org/lpc-bpf2018.html#session-2
[1] https://facebookmicrosites.github.io/bpf/blog/2018/11/14/btf-enhancement.html
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Yonghong Song <yhs@fb.com>
Cc: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
- do not generate unneeded top-level built-in.a
- let git ignore O= directory entirely
- optimize scripts/kallsyms slightly
- exclude DWARF info from *.s regardless of config options
- fix GCC toolchain search path for Clang to prepare ld.lld support
- do not generate modules.order when CONFIG_MODULES is disabled
- simplify single target rules and remove VPATH for external module build
- allow to add optional flags to dpkg-buildpackage when building deb-pkg
- move some compiler option tests from Makefile to Kconfig
- various Makefile cleanups
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=y9YG
-----END PGP SIGNATURE-----
Merge tag 'kbuild-v5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild updates from Masahiro Yamada:
- do not generate unneeded top-level built-in.a
- let git ignore O= directory entirely
- optimize scripts/kallsyms slightly
- exclude DWARF info from *.s regardless of config options
- fix GCC toolchain search path for Clang to prepare ld.lld support
- do not generate modules.order when CONFIG_MODULES is disabled
- simplify single target rules and remove VPATH for external module
build
- allow to add optional flags to dpkg-buildpackage when building
deb-pkg
- move some compiler option tests from Makefile to Kconfig
- various Makefile cleanups
* tag 'kbuild-v5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (40 commits)
kbuild: remove scripts/basic/% build target
kbuild: use -Werror=implicit-... instead of -Werror-implicit-...
kbuild: clean up scripts/gcc-version.sh
kbuild: remove cc-version macro
kbuild: update comment block of scripts/clang-version.sh
kbuild: remove commented-out INITRD_COMPRESS
kbuild: move -gsplit-dwarf, -gdwarf-4 option tests to Kconfig
kbuild: [bin]deb-pkg: add DPKG_FLAGS variable
kbuild: move ".config not found!" message from Kconfig to Makefile
kbuild: invoke syncconfig if include/config/auto.conf.cmd is missing
kbuild: simplify single target rules
kbuild: remove empty rules for makefiles
kbuild: make -r/-R effective in top Makefile for old Make versions
kbuild: move tools_silent to a more relevant place
kbuild: compute false-positive -Wmaybe-uninitialized cases in Kconfig
kbuild: refactor cc-cross-prefix implementation
kbuild: hardcode genksyms path and remove GENKSYMS variable
scripts/gdb: refactor rules for symlink creation
kbuild: create symlink to vmlinux-gdb.py in scripts_gdb target
scripts/gdb: do not descend into scripts/gdb from scripts
...
- add debugfs support for dumping dma-debug information (Corentin Labbe)
- Kconfig cleanups (Andy Shevchenko and me)
- debugfs cleanups (Greg Kroah-Hartman)
- improve dma_map_resource and use it in the media code
- arch_setup_dma_ops / arch_teardown_dma_ops cleanups
- various small cleanups and improvements for the per-device coherent
allocator
- make the DMA mask an upper bound and don't fail "too large" dma mask
in the remaning two architectures - this will allow big driver
cleanups in the following merge windows
-----BEGIN PGP SIGNATURE-----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=nAMI
-----END PGP SIGNATURE-----
Merge tag 'dma-mapping-5.1' of git://git.infradead.org/users/hch/dma-mapping
Pull DMA mapping updates from Christoph Hellwig:
- add debugfs support for dumping dma-debug information (Corentin
Labbe)
- Kconfig cleanups (Andy Shevchenko and me)
- debugfs cleanups (Greg Kroah-Hartman)
- improve dma_map_resource and use it in the media code
- arch_setup_dma_ops / arch_teardown_dma_ops cleanups
- various small cleanups and improvements for the per-device coherent
allocator
- make the DMA mask an upper bound and don't fail "too large" dma mask
in the remaning two architectures - this will allow big driver
cleanups in the following merge windows
* tag 'dma-mapping-5.1' of git://git.infradead.org/users/hch/dma-mapping: (21 commits)
Documentation/DMA-API-HOWTO: update dma_mask sections
sparc64/pci_sun4v: allow large DMA masks
sparc64/iommu: allow large DMA masks
sparc64: refactor the ali DMA quirk
ccio: allow large DMA masks
dma-mapping: remove the DMA_MEMORY_EXCLUSIVE flag
dma-mapping: remove dma_mark_declared_memory_occupied
dma-mapping: move CONFIG_DMA_CMA to kernel/dma/Kconfig
dma-mapping: improve selection of dma_declare_coherent availability
dma-mapping: remove an incorrect __iommem annotation
of: select OF_RESERVED_MEM automatically
device.h: dma_mem is only needed for HAVE_GENERIC_DMA_COHERENT
mfd/sm501: depend on HAS_DMA
dma-mapping: add a kconfig symbol for arch_teardown_dma_ops availability
dma-mapping: add a kconfig symbol for arch_setup_dma_ops availability
dma-mapping: move debug configuration options to kernel/dma
dma-debug: add dumping facility via debugfs
dma: debug: no need to check return value of debugfs_create functions
videobuf2: replace a layering violation with dma_map_resource
dma-mapping: don't BUG when calling dma_map_resource on RAM
...
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2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=dXuJ
-----END PGP SIGNATURE-----
Merge tag 'printk-for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk
Pull printk updates from Petr Mladek:
- Allow to sort mixed lines by an extra information about the caller
- Remove no longer used LOG_PREFIX.
- Some clean up and documentation update.
* tag 'printk-for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk:
printk/docs: Add extra integer types to printk-formats
printk: Remove no longer used LOG_PREFIX.
lib/vsprintf: Remove %pCr remnant in comment
printk: Pass caller information to log_store().
printk: Add caller information to printk() output.
- And scalar and array initialization coverage
- Refactor Kconfig to make options more clear
- Add self-test module for testing automatic initialization
-----BEGIN PGP SIGNATURE-----
Comment: Kees Cook <kees@outflux.net>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=6iu3
-----END PGP SIGNATURE-----
Merge tag 'gcc-plugins-v5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull gcc-plugins updates from Kees Cook:
"This adds additional type coverage to the existing structleak plugin
and adds a large set of selftests to help evaluate stack variable
zero-initialization coverage.
That can be used to test whatever instrumentation might be performing
zero-initialization: either with the structleak plugin or with Clang's
coming "-ftrivial-auto-var-init=zero" option.
Summary:
- Add scalar and array initialization coverage
- Refactor Kconfig to make options more clear
- Add self-test module for testing automatic initialization"
* tag 'gcc-plugins-v5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
lib: Introduce test_stackinit module
gcc-plugins: structleak: Generalize to all variable types
Pull livepatching updates from Jiri Kosina:
- support for something we call 'atomic replace', and allows for much
better handling of cumulative patches (which is something very useful
for distros), from Jason Baron with help of Petr Mladek and Joe
Lawrence
- improvement of handling of tasks blocking finalization, from Miroslav
Benes
- update of MAINTAINERS file to reflect move towards group
maintainership
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching: (22 commits)
livepatch/selftests: use "$@" to preserve argument list
livepatch: Module coming and going callbacks can proceed with all listed patches
livepatch: Proper error handling in the shadow variables selftest
livepatch: return -ENOMEM on ptr_id() allocation failure
livepatch: Introduce klp_for_each_patch macro
livepatch: core: Return EOPNOTSUPP instead of ENOSYS
selftests/livepatch: add DYNAMIC_DEBUG config dependency
livepatch: samples: non static warnings fix
livepatch: update MAINTAINERS
livepatch: Remove signal sysfs attribute
livepatch: Send a fake signal periodically
selftests/livepatch: introduce tests
livepatch: Remove ordering (stacking) of the livepatches
livepatch: Atomic replace and cumulative patches documentation
livepatch: Remove Nop structures when unused
livepatch: Add atomic replace
livepatch: Use lists to manage patches, objects and functions
livepatch: Simplify API by removing registration step
livepatch: Don't block the removal of patches loaded after a forced transition
livepatch: Consolidate klp_free functions
...
Here is the big char/misc driver patch pull request for 5.1-rc1.
The largest thing by far is the new habanalabs driver for their AI
accelerator chip. For now it is in the drivers/misc directory but will
probably move to a new directory soon along with other drivers of this
type.
Other than that, just the usual set of individual driver updates and
fixes. There's an "odd" merge in here from the DRM tree that they asked
me to do as the MEI driver is starting to interact with the i915 driver,
and it needed some coordination. All of those patches have been
properly acked by the relevant subsystem maintainers.
All of these have been in linux-next with no reported issues, most for
quite some time.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCXH+dPQ8cZ3JlZ0Brcm9h
aC5jb20ACgkQMUfUDdst+ym1fACgvpZAxjNzoRQJ6f06tc8ujtPk9rUAnR+tCtrZ
9e3l7H76oe33o96Qjhor
=8A2k
-----END PGP SIGNATURE-----
Merge tag 'char-misc-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver updates from Greg KH:
"Here is the big char/misc driver patch pull request for 5.1-rc1.
The largest thing by far is the new habanalabs driver for their AI
accelerator chip. For now it is in the drivers/misc directory but will
probably move to a new directory soon along with other drivers of this
type.
Other than that, just the usual set of individual driver updates and
fixes. There's an "odd" merge in here from the DRM tree that they
asked me to do as the MEI driver is starting to interact with the i915
driver, and it needed some coordination. All of those patches have
been properly acked by the relevant subsystem maintainers.
All of these have been in linux-next with no reported issues, most for
quite some time"
* tag 'char-misc-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (219 commits)
habanalabs: adjust Kconfig to fix build errors
habanalabs: use %px instead of %p in error print
habanalabs: use do_div for 64-bit divisions
intel_th: gth: Fix an off-by-one in output unassigning
habanalabs: fix little-endian<->cpu conversion warnings
habanalabs: use NULL to initialize array of pointers
habanalabs: fix little-endian<->cpu conversion warnings
habanalabs: soft-reset device if context-switch fails
habanalabs: print pointer using %p
habanalabs: fix memory leak with CBs with unaligned size
habanalabs: return correct error code on MMU mapping failure
habanalabs: add comments in uapi/misc/habanalabs.h
habanalabs: extend QMAN0 job timeout
habanalabs: set DMA0 completion to SOB 1007
habanalabs: fix validation of WREG32 to DMA completion
habanalabs: fix mmu cache registers init
habanalabs: disable CPU access on timeouts
habanalabs: add MMU DRAM default page mapping
habanalabs: Dissociate RAZWI info from event types
misc/habanalabs: adjust Kconfig to fix build errors
...
This adds a new kernel module for analysis of vmalloc allocator. It is
only enabled as a module. There are two main reasons this module should
be used for: performance evaluation and stressing of vmalloc subsystem.
It consists of several test cases. As of now there are 8. The module
has five parameters we can specify to change its the behaviour.
1) run_test_mask - set of tests to be run
id: 1, name: fix_size_alloc_test
id: 2, name: full_fit_alloc_test
id: 4, name: long_busy_list_alloc_test
id: 8, name: random_size_alloc_test
id: 16, name: fix_align_alloc_test
id: 32, name: random_size_align_alloc_test
id: 64, name: align_shift_alloc_test
id: 128, name: pcpu_alloc_test
By default all tests are in run test mask. If you want to select some
specific tests it is possible to pass the mask. For example for first,
second and fourth tests we go 11 value.
2) test_repeat_count - how many times each test should be repeated
By default it is one time per test. It is possible to pass any number.
As high the value is the test duration gets increased.
3) test_loop_count - internal test loop counter. By default it is set
to 1000000.
4) single_cpu_test - use one CPU to run the tests
By default this parameter is set to false. It means that all online
CPUs execute tests. By setting it to 1, the tests are executed by
first online CPU only.
5) sequential_test_order - run tests in sequential order
By default this parameter is set to false. It means that before running
tests the order is shuffled. It is possible to make it sequential, just
set it to 1.
Performance analysis:
In order to evaluate performance of vmalloc allocations, usually it
makes sense to use only one CPU that runs tests, use sequential order,
number of repeat tests can be different as well as set of test mask.
For example if we want to run all tests, to use one CPU and repeat each
test 3 times. Insert the module passing following parameters:
single_cpu_test=1 sequential_test_order=1 test_repeat_count=3
with following output:
<snip>
Summary: fix_size_alloc_test passed: 3 failed: 0 repeat: 3 loops: 1000000 avg: 901177 usec
Summary: full_fit_alloc_test passed: 3 failed: 0 repeat: 3 loops: 1000000 avg: 1039341 usec
Summary: long_busy_list_alloc_test passed: 3 failed: 0 repeat: 3 loops: 1000000 avg: 11775763 usec
Summary: random_size_alloc_test passed 3: failed: 0 repeat: 3 loops: 1000000 avg: 6081992 usec
Summary: fix_align_alloc_test passed: 3 failed: 0 repeat: 3, loops: 1000000 avg: 2003712 usec
Summary: random_size_align_alloc_test passed: 3 failed: 0 repeat: 3 loops: 1000000 avg: 2895689 usec
Summary: align_shift_alloc_test passed: 0 failed: 3 repeat: 3 loops: 1000000 avg: 573 usec
Summary: pcpu_alloc_test passed: 3 failed: 0 repeat: 3 loops: 1000000 avg: 95802 usec
All test took CPU0=192945605995 cycles
<snip>
The align_shift_alloc_test is expected to be failed.
Stressing:
In order to stress the vmalloc subsystem we run all available test cases
on all available CPUs simultaneously. In order to prevent constant behaviour
pattern, the test cases array is shuffled by default to randomize the order
of test execution.
For example if we want to run all tests(default), use all online CPUs(default)
with shuffled order(default) and to repeat each test 30 times. The command
would be like:
modprobe vmalloc_test test_repeat_count=30
Expected results are the system is alive, there are no any BUG_ONs or Kernel
Panics the tests are completed, no memory leaks.
[urezki@gmail.com: fix 32-bit builds]
Link: http://lkml.kernel.org/r/20190106214839.ffvjvmrn52uqog7k@pc636
[urezki@gmail.com: make CONFIG_TEST_VMALLOC depend on CONFIG_MMU]
Link: http://lkml.kernel.org/r/20190219085441.s6bg2gpy4esny5vw@pc636
Link: http://lkml.kernel.org/r/20190103142108.20744-3-urezki@gmail.com
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Oleksiy Avramchenko <oleksiy.avramchenko@sonymobile.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Use after scope bugs detector seems to be almost entirely useless for
the linux kernel. It exists over two years, but I've seen only one
valid bug so far [1]. And the bug was fixed before it has been
reported. There were some other use-after-scope reports, but they were
false-positives due to different reasons like incompatibility with
structleak plugin.
This feature significantly increases stack usage, especially with GCC <
9 version, and causes a 32K stack overflow. It probably adds
performance penalty too.
Given all that, let's remove use-after-scope detector entirely.
While preparing this patch I've noticed that we mistakenly enable
use-after-scope detection for clang compiler regardless of
CONFIG_KASAN_EXTRA setting. This is also fixed now.
[1] http://lkml.kernel.org/r/<20171129052106.rhgbjhhis53hkgfn@wfg-t540p.sh.intel.com>
Link: http://lkml.kernel.org/r/20190111185842.13978-1-aryabinin@virtuozzo.com
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Acked-by: Will Deacon <will.deacon@arm.com> [arm64]
Cc: Qian Cai <cai@lca.pw>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
CONFIG_DEBUG_INFO_SPLIT and CONFIG_DEBUG_INFO_DWARF4 enable extra
dwarf options if supported. You never know if they are really enabled
since Makefile may silently turn them off.
The actual behavior will match to the kernel configuration by
testing those compiler flags in the Kconfig stage.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This is a follow up to the commit cf65a0f6f6
("dma-mapping: move all DMA mapping code to kernel/dma")
which moved source code of DMA API to kernel/dma folder. Since there is
no file left in the lib that require DMA API debugging options move the
latter to kernel/dma as well.
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
The livepatch selftest scripts turn on dynamic_debug of livepatch
kernel source to determine expected behavior. TEST_LIVEPATCH should
therefore include DYNAMIC_DEBUG in its list of dependencies.
Signed-off-by: Joe Lawrence <joe.lawrence@redhat.com>
Acked-by: Miroslav Benes <mbenes@suse.cz>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Add a few livepatch modules and simple target modules that the included
regression suite can run tests against:
- basic livepatching (multiple patches, atomic replace)
- pre/post (un)patch callbacks
- shadow variable API
Signed-off-by: Joe Lawrence <joe.lawrence@redhat.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Tested-by: Miroslav Benes <mbenes@suse.cz>
Tested-by: Alice Ferrazzi <alice.ferrazzi@gmail.com>
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
After the transition to kprobes, symbols are resolved at runtime. This
means there is no need to have all the Kconfig and header logic to
avoid build failures. This also paves the way to having arbitrary test
locations.
Reported-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Kees Cook <keescook@chromium.org>
- support -y option for merge_config.sh to avoid downgrading =y to =m
- remove S_OTHER symbol type, and touch include/config/*.h files correctly
- fix file name and line number in lexer warnings
- fix memory leak when EOF is encountered in quotation
- resolve all shift/reduce conflicts of the parser
- warn no new line at end of file
- make 'source' statement more strict to take only string literal
- rewrite the lexer and remove the keyword lookup table
- convert to SPDX License Identifier
- compile C files independently instead of including them from zconf.y
- fix various warnings of gconfig
- misc cleanups
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=r3Fl
-----END PGP SIGNATURE-----
Merge tag 'kconfig-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kconfig updates from Masahiro Yamada:
- support -y option for merge_config.sh to avoid downgrading =y to =m
- remove S_OTHER symbol type, and touch include/config/*.h files correctly
- fix file name and line number in lexer warnings
- fix memory leak when EOF is encountered in quotation
- resolve all shift/reduce conflicts of the parser
- warn no new line at end of file
- make 'source' statement more strict to take only string literal
- rewrite the lexer and remove the keyword lookup table
- convert to SPDX License Identifier
- compile C files independently instead of including them from zconf.y
- fix various warnings of gconfig
- misc cleanups
* tag 'kconfig-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (39 commits)
kconfig: surround dbg_sym_flags with #ifdef DEBUG to fix gconf warning
kconfig: split images.c out of qconf.cc/gconf.c to fix gconf warnings
kconfig: add static qualifiers to fix gconf warnings
kconfig: split the lexer out of zconf.y
kconfig: split some C files out of zconf.y
kconfig: convert to SPDX License Identifier
kconfig: remove keyword lookup table entirely
kconfig: update current_pos in the second lexer
kconfig: switch to ASSIGN_VAL state in the second lexer
kconfig: stop associating kconf_id with yylval
kconfig: refactor end token rules
kconfig: stop supporting '.' and '/' in unquoted words
treewide: surround Kconfig file paths with double quotes
microblaze: surround string default in Kconfig with double quotes
kconfig: use T_WORD instead of T_VARIABLE for variables
kconfig: use specific tokens instead of T_ASSIGN for assignments
kconfig: refactor scanning and parsing "option" properties
kconfig: use distinct tokens for type and default properties
kconfig: remove redundant token defines
kconfig: rename depends_list to comment_option_list
...
Kmemleak scan can be cpu intensive and can stall user tasks at times. To
prevent this, add config DEBUG_KMEMLEAK_AUTO_SCAN to enable/disable auto
scan on boot up. Also protect first_run with DEBUG_KMEMLEAK_AUTO_SCAN as
this is meant for only first automatic scan.
Link: http://lkml.kernel.org/r/1540231723-7087-1-git-send-email-prpatel@nvidia.com
Signed-off-by: Sri Krishna chowdary <schowdary@nvidia.com>
Signed-off-by: Sachin Nikam <snikam@nvidia.com>
Signed-off-by: Prateek <prpatel@nvidia.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The Kconfig lexer supports special characters such as '.' and '/' in
the parameter context. In my understanding, the reason is just to
support bare file paths in the source statement.
I do not see a good reason to complicate Kconfig for the room of
ambiguity.
The majority of code already surrounds file paths with double quotes,
and it makes sense since file paths are constant string literals.
Make it treewide consistent now.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Ingo Molnar <mingo@kernel.org>
Sometimes we want to print a series of printk() messages to consoles
without being disturbed by concurrent printk() from interrupts and/or
other threads. But we can't enforce printk() callers to use their local
buffers because we need to ask them to make too much changes. Also, even
buffering up to one line inside printk() might cause failing to emit
an important clue under critical situation.
Therefore, instead of trying to help buffering, let's try to help
reconstructing messages by saving caller information as of calling
log_store() and adding it as "[T$thread_id]" or "[C$processor_id]"
upon printing to consoles.
Some examples for console output:
[ 1.222773][ T1] x86: Booting SMP configuration:
[ 2.779635][ T1] pci 0000:00:01.0: PCI bridge to [bus 01]
[ 5.069193][ T268] Fusion MPT base driver 3.04.20
[ 9.316504][ C2] random: fast init done
[ 13.413336][ T3355] Initialized host personality
Some examples for /dev/kmsg output:
6,496,1222773,-,caller=T1;x86: Booting SMP configuration:
6,968,2779635,-,caller=T1;pci 0000:00:01.0: PCI bridge to [bus 01]
SUBSYSTEM=pci
DEVICE=+pci:0000:00:01.0
6,1353,5069193,-,caller=T268;Fusion MPT base driver 3.04.20
5,1526,9316504,-,caller=C2;random: fast init done
6,1575,13413336,-,caller=T3355;Initialized host personality
Note that this patch changes max length of messages which can be printed
by printk() or written to /dev/kmsg interface from 992 bytes to 976 bytes,
based on an assumption that userspace won't try to write messages hitting
that border line to /dev/kmsg interface.
Link: http://lkml.kernel.org/r/93f19e57-5051-c67d-9af4-b17624062d44@i-love.sakura.ne.jp
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: LKML <linux-kernel@vger.kernel.org>
Cc: syzkaller <syzkaller@googlegroups.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Acked-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
This lib tracks objects which could be of two types:
1) root object
2) nested object - with a "delta" which differentiates it from
the associated root object
The objects are tracked by a hashtable and reference-counted. User is
responsible of implementing callbacks to create/destroy root entity
related to each root object and callback to create/destroy nested object
delta.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
All architecures use memblock for early memory management. There is no need
for the CONFIG_HAVE_MEMBLOCK configuration option.
[rppt@linux.vnet.ibm.com: of/fdt: fixup #ifdefs]
Link: http://lkml.kernel.org/r/20180919103457.GA20545@rapoport-lnx
[rppt@linux.vnet.ibm.com: csky: fixups after bootmem removal]
Link: http://lkml.kernel.org/r/20180926112744.GC4628@rapoport-lnx
[rppt@linux.vnet.ibm.com: remove stale #else and the code it protects]
Link: http://lkml.kernel.org/r/1538067825-24835-1-git-send-email-rppt@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/1536927045-23536-4-git-send-email-rppt@linux.vnet.ibm.com
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Tested-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Ley Foon Tan <lftan@altera.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Palmer Dabbelt <palmer@sifive.com>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Serge Semin <fancer.lancer@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull XArray conversion from Matthew Wilcox:
"The XArray provides an improved interface to the radix tree data
structure, providing locking as part of the API, specifying GFP flags
at allocation time, eliminating preloading, less re-walking the tree,
more efficient iterations and not exposing RCU-protected pointers to
its users.
This patch set
1. Introduces the XArray implementation
2. Converts the pagecache to use it
3. Converts memremap to use it
The page cache is the most complex and important user of the radix
tree, so converting it was most important. Converting the memremap
code removes the only other user of the multiorder code, which allows
us to remove the radix tree code that supported it.
I have 40+ followup patches to convert many other users of the radix
tree over to the XArray, but I'd like to get this part in first. The
other conversions haven't been in linux-next and aren't suitable for
applying yet, but you can see them in the xarray-conv branch if you're
interested"
* 'xarray' of git://git.infradead.org/users/willy/linux-dax: (90 commits)
radix tree: Remove multiorder support
radix tree test: Convert multiorder tests to XArray
radix tree tests: Convert item_delete_rcu to XArray
radix tree tests: Convert item_kill_tree to XArray
radix tree tests: Move item_insert_order
radix tree test suite: Remove multiorder benchmarking
radix tree test suite: Remove __item_insert
memremap: Convert to XArray
xarray: Add range store functionality
xarray: Move multiorder_check to in-kernel tests
xarray: Move multiorder_shrink to kernel tests
xarray: Move multiorder account test in-kernel
radix tree test suite: Convert iteration test to XArray
radix tree test suite: Convert tag_tagged_items to XArray
radix tree: Remove radix_tree_clear_tags
radix tree: Remove radix_tree_maybe_preload_order
radix tree: Remove split/join code
radix tree: Remove radix_tree_update_node_t
page cache: Finish XArray conversion
dax: Convert page fault handlers to XArray
...
Here is the big set of char/misc patches for 4.20-rc1.
Loads of things here, we have new code in all of these driver
subsystems:
fpga
stm
extcon
nvmem
eeprom
hyper-v
gsmi
coresight
thunderbolt
vmw_balloon
goldfish
soundwire
along with lots of fixes and minor changes to other small drivers.
All of these have been in linux-next for a while with no reported
issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCW9Le5A8cZ3JlZ0Brcm9h
aC5jb20ACgkQMUfUDdst+yn+BQCfZ6DtCIgqo0UW3dLV8Fd0wya9kw0AoNglzJJ6
YRZiaSdRiggARpNdh3ME
=97BX
-----END PGP SIGNATURE-----
Merge tag 'char-misc-4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver updates from Greg KH:
"Here is the big set of char/misc patches for 4.20-rc1.
Loads of things here, we have new code in all of these driver
subsystems:
- fpga
- stm
- extcon
- nvmem
- eeprom
- hyper-v
- gsmi
- coresight
- thunderbolt
- vmw_balloon
- goldfish
- soundwire
along with lots of fixes and minor changes to other small drivers.
All of these have been in linux-next for a while with no reported
issues"
* tag 'char-misc-4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (245 commits)
Documentation/security-bugs: Clarify treatment of embargoed information
lib: Fix ia64 bootloader linkage
MAINTAINERS: Clarify UIO vs UIOVEC maintainer
docs/uio: fix a grammar nitpick
docs: fpga: document programming fpgas using regions
fpga: add devm_fpga_region_create
fpga: bridge: add devm_fpga_bridge_create
fpga: mgr: add devm_fpga_mgr_create
hv_balloon: Replace spin_is_locked() with lockdep
sgi-xp: Replace spin_is_locked() with lockdep
eeprom: New ee1004 driver for DDR4 memory
eeprom: at25: remove unneeded 'at25_remove'
w1: IAD Register is yet readable trough iad sys file. Fix snprintf (%u for unsigned, count for max size).
misc: mic: scif: remove set but not used variables 'src_dma_addr, dst_dma_addr'
misc: mic: fix a DMA pool free failure
platform: goldfish: pipe: Add a blank line to separate varibles and code
platform: goldfish: pipe: Remove redundant casting
platform: goldfish: pipe: Call misc_deregister if init fails
platform: goldfish: pipe: Move the file-scope goldfish_pipe_dev variable into the driver state
platform: goldfish: pipe: Move the file-scope goldfish_pipe_miscdev variable into the driver state
...
Pull ARM updates from Russell King:
"The main item in this pull request are the Spectre variant 1.1 fixes
from Julien Thierry.
A few other patches to improve various areas, and removal of some
obsolete mcount bits and a redundant kbuild conditional"
* 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
ARM: 8802/1: Call syscall_trace_exit even when system call skipped
ARM: 8797/1: spectre-v1.1: harden __copy_to_user
ARM: 8796/1: spectre-v1,v1.1: provide helpers for address sanitization
ARM: 8795/1: spectre-v1.1: use put_user() for __put_user()
ARM: 8794/1: uaccess: Prevent speculative use of the current addr_limit
ARM: 8793/1: signal: replace __put_user_error with __put_user
ARM: 8792/1: oabi-compat: copy oabi events using __copy_to_user()
ARM: 8791/1: vfp: use __copy_to_user() when saving VFP state
ARM: 8790/1: signal: always use __copy_to_user to save iwmmxt context
ARM: 8789/1: signal: copy registers using __copy_to_user()
ARM: 8801/1: makefile: use ARMv3M mode for RiscPC
ARM: 8800/1: use choice for kernel unwinders
ARM: 8798/1: remove unnecessary KBUILD_SRC ifeq conditional
ARM: 8788/1: ftrace: remove old mcount support
ARM: 8786/1: Debug kernel copy by printing
The xa_load function brings with it a lot of infrastructure; xa_empty(),
xa_is_err(), and large chunks of the XArray advanced API that are used
to implement xa_load.
As the test-suite demonstrates, it is possible to use the XArray functions
on a radix tree. The radix tree functions depend on the GFP flags being
stored in the root of the tree, so it's not possible to use the radix
tree functions on an XArray.
Signed-off-by: Matthew Wilcox <willy@infradead.org>
This adds a helper to paste 2 pointer arrays together, useful for merging
various types of attribute arrays. There are a few places in the kernel
tree where this is open coded, and I just added one more in the STM class.
The naming is inspired by memset_p() and memcat(), and partial credit for
it goes to Andy Shevchenko.
This patch adds the function wrapped in a type-enforcing macro and a test
module.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
While in theory multiple unwinders could be compiled in, it does
not make sense in practise. Use a choice to make the unwinder
selection mutually exclusive and mandatory.
Already before this commit it has not been possible to deselect
FRAME_POINTER. Remove the obsolete comment.
Furthermore, to produce a meaningful backtrace with FRAME_POINTER
enabled the kernel needs a specific function prologue:
mov ip, sp
stmfd sp!, {fp, ip, lr, pc}
sub fp, ip, #4
To get to the required prologue gcc uses apcs and no-sched-prolog.
This compiler options are not available on clang, and clang is not
able to generate the required prologue. Make the FRAME_POINTER
config symbol depending on !clang.
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Stefan Agner <stefan@agner.ch>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Fix three typos in CONFIG_WARN_ALL_UNSEEDED_RANDOM help text.
Link: http://lkml.kernel.org/r/20180830194505.4778-1-thibaut@sautereau.fr
Signed-off-by: Thibaut Sautereau <thibaut@sautereau.fr>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull IDA updates from Matthew Wilcox:
"A better IDA API:
id = ida_alloc(ida, GFP_xxx);
ida_free(ida, id);
rather than the cumbersome ida_simple_get(), ida_simple_remove().
The new IDA API is similar to ida_simple_get() but better named. The
internal restructuring of the IDA code removes the bitmap
preallocation nonsense.
I hope the net -200 lines of code is convincing"
* 'ida-4.19' of git://git.infradead.org/users/willy/linux-dax: (29 commits)
ida: Change ida_get_new_above to return the id
ida: Remove old API
test_ida: check_ida_destroy and check_ida_alloc
test_ida: Convert check_ida_conv to new API
test_ida: Move ida_check_max
test_ida: Move ida_check_leaf
idr-test: Convert ida_check_nomem to new API
ida: Start new test_ida module
target/iscsi: Allocate session IDs from an IDA
iscsi target: fix session creation failure handling
drm/vmwgfx: Convert to new IDA API
dmaengine: Convert to new IDA API
ppc: Convert vas ID allocation to new IDA API
media: Convert entity ID allocation to new IDA API
ppc: Convert mmu context allocation to new IDA API
Convert net_namespace to new IDA API
cb710: Convert to new IDA API
rsxx: Convert to new IDA API
osd: Convert to new IDA API
sd: Convert to new IDA API
...
It seems contributors follow the style of Kconfig entries where explicit
'default n' is present. The default 'default' is 'n' already, thus, drop
these lines from Kconfig to make it more clear.
Link: http://lkml.kernel.org/r/20180719085131.79541-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Coly Li <colyli@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
We haven't had lots of deprecation warnings lately, but the rdma use of
it made them flare up again.
They are not useful. They annoy everybody, and nobody ever does
anything about them, because it's always "somebody elses problem". And
when people start thinking that warnings are normal, they stop looking
at them, and the real warnings that mean something go unnoticed.
If you want to get rid of a function, just get rid of it. Convert every
user to the new world order.
And if you can't do that, then don't annoy everybody else with your
marking that says "I couldn't be bothered to fix this, so I'll just spam
everybody elses build logs with warnings about my laziness".
Make a kernelnewbies wiki page about things that could be cleaned up,
write a blog post about it, or talk to people on the mailing lists. But
don't add warnings to the kernel build about cleanup that you think
should happen but you aren't doing yourself.
Don't. Just don't.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull networking updates from David Miller:
"Highlights:
- Gustavo A. R. Silva keeps working on the implicit switch fallthru
changes.
- Support 802.11ax High-Efficiency wireless in cfg80211 et al, From
Luca Coelho.
- Re-enable ASPM in r8169, from Kai-Heng Feng.
- Add virtual XFRM interfaces, which avoids all of the limitations of
existing IPSEC tunnels. From Steffen Klassert.
- Convert GRO over to use a hash table, so that when we have many
flows active we don't traverse a long list during accumluation.
- Many new self tests for routing, TC, tunnels, etc. Too many
contributors to mention them all, but I'm really happy to keep
seeing this stuff.
- Hardware timestamping support for dpaa_eth/fsl-fman from Yangbo Lu.
- Lots of cleanups and fixes in L2TP code from Guillaume Nault.
- Add IPSEC offload support to netdevsim, from Shannon Nelson.
- Add support for slotting with non-uniform distribution to netem
packet scheduler, from Yousuk Seung.
- Add UDP GSO support to mlx5e, from Boris Pismenny.
- Support offloading of Team LAG in NFP, from John Hurley.
- Allow to configure TX queue selection based upon RX queue, from
Amritha Nambiar.
- Support ethtool ring size configuration in aquantia, from Anton
Mikaev.
- Support DSCP and flowlabel per-transport in SCTP, from Xin Long.
- Support list based batching and stack traversal of SKBs, this is
very exciting work. From Edward Cree.
- Busyloop optimizations in vhost_net, from Toshiaki Makita.
- Introduce the ETF qdisc, which allows time based transmissions. IGB
can offload this in hardware. From Vinicius Costa Gomes.
- Add parameter support to devlink, from Moshe Shemesh.
- Several multiplication and division optimizations for BPF JIT in
nfp driver, from Jiong Wang.
- Lots of prepatory work to make more of the packet scheduler layer
lockless, when possible, from Vlad Buslov.
- Add ACK filter and NAT awareness to sch_cake packet scheduler, from
Toke Høiland-Jørgensen.
- Support regions and region snapshots in devlink, from Alex Vesker.
- Allow to attach XDP programs to both HW and SW at the same time on
a given device, with initial support in nfp. From Jakub Kicinski.
- Add TLS RX offload and support in mlx5, from Ilya Lesokhin.
- Use PHYLIB in r8169 driver, from Heiner Kallweit.
- All sorts of changes to support Spectrum 2 in mlxsw driver, from
Ido Schimmel.
- PTP support in mv88e6xxx DSA driver, from Andrew Lunn.
- Make TCP_USER_TIMEOUT socket option more accurate, from Jon
Maxwell.
- Support for templates in packet scheduler classifier, from Jiri
Pirko.
- IPV6 support in RDS, from Ka-Cheong Poon.
- Native tproxy support in nf_tables, from Máté Eckl.
- Maintain IP fragment queue in an rbtree, but optimize properly for
in-order frags. From Peter Oskolkov.
- Improvde handling of ACKs on hole repairs, from Yuchung Cheng"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1996 commits)
bpf: test: fix spelling mistake "REUSEEPORT" -> "REUSEPORT"
hv/netvsc: Fix NULL dereference at single queue mode fallback
net: filter: mark expected switch fall-through
xen-netfront: fix warn message as irq device name has '/'
cxgb4: Add new T5 PCI device ids 0x50af and 0x50b0
net: dsa: mv88e6xxx: missing unlock on error path
rds: fix building with IPV6=m
inet/connection_sock: prefer _THIS_IP_ to current_text_addr
net: dsa: mv88e6xxx: bitwise vs logical bug
net: sock_diag: Fix spectre v1 gadget in __sock_diag_cmd()
ieee802154: hwsim: using right kind of iteration
net: hns3: Add vlan filter setting by ethtool command -K
net: hns3: Set tx ring' tc info when netdev is up
net: hns3: Remove tx ring BD len register in hns3_enet
net: hns3: Fix desc num set to default when setting channel
net: hns3: Fix for phy link issue when using marvell phy driver
net: hns3: Fix for information of phydev lost problem when down/up
net: hns3: Fix for command format parsing error in hclge_is_all_function_id_zero
net: hns3: Add support for serdes loopback selftest
bnxt_en: take coredump_record structure off stack
...
Move the source statements of arch-independent Kconfig files instead of
duplicating the includes in every arch/$(SRCARCH)/Kconfig.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iQIcBAABAgAGBQJbdFsfAAoJED2LAQed4NsGxHsP/1tmA57OOOj8oGxO2OXhXVbr
Q0MZqCoV4bqMvK/hgCQdl9f+tp0m+j12x4xDLdVf4OqnTXMbqvPDu3uQVKvaj/k1
gHhsFA1tFgSbuJ8InltUsrPEQqbceeJsj50xHVAKijqI6LYeRPPSU7aE9obn+OzH
n2nd5sLKvMI/dqdJvW6i5KPydqTH3r3iA7D+ne/XQj0s0EMXvXUPmDT1+ijTnM4a
yfm6W5p7L/c3Ugf1Pz5PfnPl4BxBwZMfW5ie/UO8j5C6Rl0iPaOGuuHurocaaJb3
MefR/7NEAR3G8MhJyL2+70jbbwhjpqR2b5ooz1vpuulPHxjeU45BY60XIBWq1afR
ewsc12MMCYB695ieYWoHdaWgxD/jhffyRuajfpkXKIZEMgDxS03sMhdULXENVMx1
M0ZQ01g/NLWt9ti9DY3eTKB3ymOhnBa1sa77nGGUHkITq4DQKwPX1J9FP/HT6RNt
uOvzeH5kGzc7tqOlZAO0kHbwhQG1uqGcd78IYd4lgf/XfkSgDERTWjnJmnQbwr9m
3PFuST2u8eyO+8Lh1MK76TXOEkXsHMdFugPmb6SlgtMEPKGVLDPlsj52o/LFtgzl
eygfMiBFr2+ttkZ6IpNcpmQ4IztmDpz6XoMk3PqDAfUTUSYpCnq1gAEuff/eisCM
Odva1ZZaeQ7WpxhsP8rr
=gsQJ
-----END PGP SIGNATURE-----
Merge tag 'kconfig-v4.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kconfig consolidation from Masahiro Yamada:
"Consolidation of Kconfig files by Christoph Hellwig.
Move the source statements of arch-independent Kconfig files instead
of duplicating the includes in every arch/$(SRCARCH)/Kconfig"
* tag 'kconfig-v4.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kconfig: add a Memory Management options" menu
kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt
kconfig: use a menu in arch/Kconfig to reduce clutter
kconfig: include kernel/Kconfig.preempt from init/Kconfig
Kconfig: consolidate the "Kernel hacking" menu
kconfig: include common Kconfig files from top-level Kconfig
kconfig: remove duplicate SWAP symbol defintions
um: create a proper drivers Kconfig
um: cleanup Kconfig files
um: stop abusing KBUILD_KCONFIG
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2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=TTFG
-----END PGP SIGNATURE-----
Merge tag 'printk-for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk
Pull printk updates from Petr Mladek:
- Different vendors have a different expectation about a console
quietness. Make it configurable to reduce bike-shedding about the
upstream default
- Decide about the message visibility when the message is stored. It
avoids races caused by a delayed console handling
- Always store printk() messages into the per-CPU buffers again in NMI.
The only exception is when flushing trace log in panic(). There the
risk of loosing messages is worth an eventual reordering
- Handle invalid %pO printf modifiers correctly
- Better handle %p printf modifier tests before crng is initialized
- Some clean up
* tag 'printk-for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk:
lib/vsprintf: Do not handle %pO[^F] as %px
printk: Fix warning about unused suppress_message_printing
printk/nmi: Prevent deadlock when accessing the main log buffer in NMI
printk: Create helper function to queue deferred console handling
printk: Split the code for storing a message into the log buffer
printk: Clean up syslog_print_all()
printk: Remove unnecessary kmalloc() from syslog during clear
printk: Make CONSOLE_LOGLEVEL_QUIET configurable
printk: make sure to print log on console.
lib/test_printf.c: accept "ptrval" as valid result for plain 'p' tests
Qian Cai