Implement return_address() and use it instead of __builtin_return_address(n).
__builtin_return_address(n) is not guaranteed to work for n > 0,
therefore implement a private return_address() function which walks
the stack frames and returns the proper return address.
This way we get also rid of a compile warning which gcc 6.1 emits and
look like all other architectures.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Since commit 3b9d6da67e ("cpu/hotplug: Fix rollback during error-out
in __cpu_disable()") it is ensured that callbacks of CPU_ONLINE and
CPU_DOWN_PREPARE are processed on the hotplugged CPU. Due to this SMP
function calls are no longer required.
Replace smp_call_function_single() with a direct call of
setup_pmc_cpu(). To keep the calling convention, interrupts are
explicitly disabled around the call.
Cc: linux-s390@vger.kernel.org
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Since commit 3b9d6da67e ("cpu/hotplug: Fix rollback during error-out
in __cpu_disable()") it is ensured that callbacks of CPU_ONLINE and
CPU_DOWN_PREPARE are processed on the hotplugged CPU. Due to this SMP
function calls are no longer required.
Replace smp_call_function_single() with a direct call of
setup_pmc_cpu(). To keep the calling convention, interrupts are
explicitly disabled around the call.
Cc: linux-s390@vger.kernel.org
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
The current default processor type is z900. The BPF jit compiler
depends on PACK_STACK && HAVE_MARCH_Z196_FEATURES. To have the
BPF jit code included in compiles with 'make allmodconfig' set
the default processor type to z196.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Analog to git commit 0c8c0f03e3
"x86/fpu, sched: Dynamically allocate 'struct fpu'"
move the struct fpu to the end of the struct thread_struct,
set CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT and add the
setup_task_size() function to calculate the correct size
fo the task struct.
For the performance_defconfig this increases the size of
struct task_struct from 7424 bytes to 7936 bytes (MACHINE_HAS_VX==1)
or 7552 bytes (MACHINE_HAS_VX==0). The dynamic allocation of the
struct fpu is removed. The slab cache uses an 8KB block for the
task struct in all cases, there is enough room for the struct fpu.
For MACHINE_HAS_VX==1 each task now needs 512 bytes less memory.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
The CPACF instructions are going be used in KVM as well, move the
defines and the inline functions from arch/s390/crypt/crypt_s390.h
to arch/s390/include/asm. Rename the header to cpacf.h and replace
the crypt_s390_xxx names with cpacf_xxx.
While we are at it, cleanup the header as well. The encoding for
the CPACF operations is odd, there is an enum for each of the CPACF
instructions with the hardware function code in the lower 8 bits of
each entry and a software defined number for the CPACF instruction
in the upper 8 bits. Remove the superfluous software number and
replace the enums with simple defines.
The crypt_s390_func_available() function tests for the presence
of a specific CPACF operations. The new name of the function is
cpacf_query and it works slightly different than before. It gets
passed an opcode of an CPACF instruction and a function code for
this instruction. The facility_mask parameter is gone, the opcode
is used to find the correct MSA facility bit to check if the CPACF
instruction itself is available. If it is the query function of the
given instruction is used to test if the requested CPACF operation
is present.
Acked-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Implement the function type specific function measurement block used
in new machines.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Implement new DASD IOCTL BIODASDCHECKFMT to check a range of tracks on a
DASD volume for correct formatting. The following characteristics are
checked:
- Block size
- ECKD key length
- ECKD record ID
- Number of records per track
Signed-off-by: Jan Höppner <hoeppner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Provide an report_error attribute to send an adapter-error
notification associated with a PCI function.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Add SCLP event 24 "Adapter-error notification".
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
While looking at set_task_state() users I stumbled over the s390 pfault
interrupt code. Since Heiko provided a great explanation on how it
worked, I figured we ought to preserve this.
Also make a few little tweaks to the code to aid in readability and
explicitly comment the unusual blocking scheme.
Based-on-text-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Make sure that s390 appears to be a big endian machine by defining
this config option.
Without this s390 appears to be little endian as seen by e.g. the
recordmount script: "perl ./scripts/recordmcount.pl "s390" "little"
"64""
This has no practical impact within the script since the endian
variable is only evaluated for mips. However there are already a
couple of common code places which evaluate this config option. None
of them is relevant for s390 currently though.
To avoid any issues in the future (and fix the recordmcount oddity)
add the new config option.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
arch_spin_lock_wait_flags() checks if a spinlock is not held before
trying a compare and swap instruction. If the lock is unlocked it
tries the compare and swap instruction, however if a different cpu
grabbed the lock in the meantime the instruction will fail as
expected.
Subsequently the arch_spin_lock_wait_flags() incorrectly tries to
figure out if the cpu that holds the lock is running. However it is
using the wrong cpu number for this (-1) and then will also yield the
current cpu to the wrong cpu.
Fix this by adding a missing continue statement.
Fixes: 470ada6b1a ("s390/spinlock: refactor arch_spin_lock_wait[_flags]")
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Fixes this build error on linux-next:
kernel/seccomp.c: In function '__secure_computing_strict':
kernel/seccomp.c:526:3: error: implicit declaration of function
'get_compat_mode1_syscalls'
The retrieval of compat syscall numbers were moved into inline function
defined in asm-generic header but the asm-generic header is not being
used by s390.
[heiko.carstens@de.ibm.com]: even though the build error will trigger
only in the next merge window it makes sense to include the generic
header file already now.
Fixes: ("seccomp: Get compat syscalls from asm-generic header")
Cc: Matt Redfearn <matt.redfearn@imgtec.com>
Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Newer machines might use a different (larger) format for function
measurement blocks. To ensure that we comply with the alignment
requirement on these machines and prevent memory corruption (when
firmware writes more data than we expect) add 16 padding bytes
at the end of the fmb.
Cc: stable@vger.kernel.org # v4.1+
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
- Fixup preempt underflow with huge pages from Sebastian Siewior
- Fix altivec SPR not being saved from Oliver O'Halloran
- Correct used_vsr comment from Simon Guo
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Merge tag 'powerpc-4.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
- Fixup preempt underflow with huge pages from Sebastian Siewior
- Fix altivec SPR not being saved from Oliver O'Halloran
- Correct used_vsr comment from Simon Guo
* tag 'powerpc-4.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc: Correct used_vsr comment
powerpc/process: Fix altivec SPR not being saved
powerpc/mm: Fixup preempt underflow with huge pages
Pull s390 fixes from Martin Schwidefsky:
- A proper fix for the locking issue in the dasd driver
- Wire up the new preadv2 nad pwritev2 system calls
- Add the mark_rodata_ro function and set DEBUG_RODATA=y
- A few more bug fixes.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390: wire up preadv2/pwritev2 syscalls
s390/pci: PCI function group 0 is valid for clp_query_pci_fn
s390/crypto: provide correct file mode at device register.
s390/mm: handle PTE-mapped tail pages in fast gup
s390: add DEBUG_RODATA support
s390: disable postinit-readonly for now
s390/dasd: reorder lcu and device lock
s390/cpum_sf: Fix cpu hotplug notifier transitions
s390/cpum_cf: Fix missing cpu hotplug notifier transition
The PCI function group 0 is a valid function group,
it is wrong to reject it.
Let's accept PCI function group 0.
Signed-off-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Acked-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Pull parisc fixes from Helge Deller:
"Fix seccomp filter support and SIGSYS signals on compat kernel.
Both patches are tagged for v4.5 stable kernel"
* 'parisc-4.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: Fix and enable seccomp filter support
parisc: Fix SIGSYS signals in compat case
Pull nvdimm mcsafe_memcpy use from Dan Williams:
"Now that mcsafe_memcpy() has landed, and the return value was been
clarified in commit cbf8b5a2b6 ("x86/mm, x86/mce: Fix return
type/value for memcpy_mcsafe()"), let's hook up its primary usage in
the pmem driver.
The compilation problems from the initial posting have been fixed,
this has appeared in a -next release with no reported issues, and it
picked up an ack from Ingo. There is no pressing need to merge this
in 4.6- rc2. However, if we wait until 4.7 the new memcpy_mcsafe()
capability will ship without a user in 4.6-final"
* 'libnvdimm-for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
x86, pmem: use memcpy_mcsafe() for memcpy_from_pmem()
The seccomp filter support requires careful handling of task registers. This
includes reloading of the return value (%r28) and proper syscall exit if
secure_computing() returned -1.
Additionally we need to sign-extend the syscall number from signed 32bit to
signed 64bit in do_syscall_trace_enter() since the ptrace interface only allows
storing 32bit values in compat mode.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # v4.5
nios2 builds fail with the following build error.
arch/nios2/kernel/prom.c: In function 'early_init_dt_scan_serial':
arch/nios2/kernel/prom.c💯2: error:
implicit declaration of function 'fdt_translate_address'
Commit c90fe9c039 ("of: earlycon: Move address translation to
of_setup_earlycon()") replaced fdt_translate_address() with
of_flat_dt_translate_address() but missed updating the nios2 code.
Fixes: c90fe9c039 ("of: earlycon: Move address translation to of_setup_earlycon()")
Cc: Peter Hurley <peter@hurleysoftware.com>
Cc: Rob Herring <robh@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Ley Foon Tan <lftan@altera.com>
When the prng device driver calls misc_register() there is the possibility
to also provide the recommented file permissions. This fix now gives
useful values (0644) where previously just the default was used (resulting
in 0600 for the device file).
Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
The used_vsr flag is set if process has used VSX registers, not Altivec
registers. But the comment says otherwise, correct the comment.
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
In save_sprs() in process.c contains the following test:
if (cpu_has_feature(cpu_has_feature(CPU_FTR_ALTIVEC)))
t->vrsave = mfspr(SPRN_VRSAVE);
CPU feature with the mask 0x1 is CPU_FTR_COHERENT_ICACHE so the test
is equivilent to:
if (cpu_has_feature(CPU_FTR_ALTIVEC) &&
cpu_has_feature(CPU_FTR_COHERENT_ICACHE))
On CPUs without support for both (i.e G5) this results in vrsave not
being saved between context switches. The vector register save/restore
code doesn't use VRSAVE to determine which registers to save/restore,
but the value of VRSAVE is used to determine if altivec is being used
in several code paths.
Fixes: 152d523e63 ("powerpc: Create context switch helpers save_sprs() and restore_sprs()")
Cc: stable@vger.kernel.org
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
hugepd_free() used __get_cpu_var() once. Nothing ensured that the code
accessing the variable did not migrate from one CPU to another and soon
this was noticed by Tiejun Chen in 94b09d7554 ("powerpc/hugetlb:
Replace __get_cpu_var with get_cpu_var"). So we had it fixed.
Christoph Lameter was doing his __get_cpu_var() replaces and forgot
PowerPC. Then he noticed this and sent his fixed up batch again which
got applied as 69111bac42 ("powerpc: Replace __get_cpu_var uses").
The careful reader will noticed one little detail: get_cpu_var() got
replaced with this_cpu_ptr(). So now we have a put_cpu_var() which does
a preempt_enable() and nothing that does preempt_disable() so we
underflow the preempt counter.
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: stable@vger.kernel.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Update the definition of memcpy_from_pmem() to return 0 or a negative
error code. Implement x86/arch_memcpy_from_pmem() with memcpy_mcsafe().
Cc: Borislav Petkov <bp@alien8.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Pull sparc fixes from David Miller:
"Minor typing cleanup from Joe Perches, and some comment typo fixes
from Adam Buchbinder"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
sparc: Convert naked unsigned uses to unsigned int
sparc: Fix misspellings in comments.
Pull arch/tile bugfixes from Chris Metcalf:
"These include updates to MAINTAINERS, some comment spelling fixes, and
a bugfix to the tile kgdb.c support"
* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
tile: Fix misspellings in comments.
MAINTAINERS: update web link for tile architecture
MAINTAINERS: update arch/tile maintainer email domain
tile kgdb: fix bug in copy to gdb regs, and optimize memset
Merge fourth patch-bomb from Andrew Morton:
"A lot more stuff than expected, sorry. A bunch of ocfs2 reviewing was
finished off.
- mhocko's oom-reaper out-of-memory-handler changes
- ocfs2 fixes and features
- KASAN feature work
- various fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (42 commits)
thp: fix typo in khugepaged_scan_pmd()
MAINTAINERS: fill entries for KASAN
mm/filemap: generic_file_read_iter(): check for zero reads unconditionally
kasan: test fix: warn if the UAF could not be detected in kmalloc_uaf2
mm, kasan: stackdepot implementation. Enable stackdepot for SLAB
arch, ftrace: for KASAN put hard/soft IRQ entries into separate sections
mm, kasan: add GFP flags to KASAN API
mm, kasan: SLAB support
kasan: modify kmalloc_large_oob_right(), add kmalloc_pagealloc_oob_right()
include/linux/oom.h: remove undefined oom_kills_count()/note_oom_kill()
mm/page_alloc: prevent merging between isolated and other pageblocks
drivers/memstick/host/r592.c: avoid gcc-6 warning
ocfs2: extend enough credits for freeing one truncate record while replaying truncate records
ocfs2: extend transaction for ocfs2_remove_rightmost_path() and ocfs2_update_edge_lengths() before to avoid inconsistency between inode and et
ocfs2/dlm: move lock to the tail of grant queue while doing in-place convert
ocfs2: solve a problem of crossing the boundary in updating backups
ocfs2: fix occurring deadlock by changing ocfs2_wq from global to local
ocfs2/dlm: fix BUG in dlm_move_lockres_to_recovery_list
ocfs2/dlm: fix race between convert and recovery
ocfs2: fix a deadlock issue in ocfs2_dio_end_io_write()
...
Implement the stack depot and provide CONFIG_STACKDEPOT. Stack depot
will allow KASAN store allocation/deallocation stack traces for memory
chunks. The stack traces are stored in a hash table and referenced by
handles which reside in the kasan_alloc_meta and kasan_free_meta
structures in the allocated memory chunks.
IRQ stack traces are cut below the IRQ entry point to avoid unnecessary
duplication.
Right now stackdepot support is only enabled in SLAB allocator. Once
KASAN features in SLAB are on par with those in SLUB we can switch SLUB
to stackdepot as well, thus removing the dependency on SLUB stack
bookkeeping, which wastes a lot of memory.
This patch is based on the "mm: kasan: stack depots" patch originally
prepared by Dmitry Chernenkov.
Joonsoo has said that he plans to reuse the stackdepot code for the
mm/page_owner.c debugging facility.
[akpm@linux-foundation.org: s/depot_stack_handle/depot_stack_handle_t]
[aryabinin@virtuozzo.com: comment style fixes]
Signed-off-by: Alexander Potapenko <glider@google.com>
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Andrey Konovalov <adech.fo@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Konstantin Serebryany <kcc@google.com>
Cc: Dmitry Chernenkov <dmitryc@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
KASAN needs to know whether the allocation happens in an IRQ handler.
This lets us strip everything below the IRQ entry point to reduce the
number of unique stack traces needed to be stored.
Move the definition of __irq_entry to <linux/interrupt.h> so that the
users don't need to pull in <linux/ftrace.h>. Also introduce the
__softirq_entry macro which is similar to __irq_entry, but puts the
corresponding functions to the .softirqentry.text section.
Signed-off-by: Alexander Potapenko <glider@google.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Andrey Konovalov <adech.fo@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Konstantin Serebryany <kcc@google.com>
Cc: Dmitry Chernenkov <dmitryc@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
There are only three patches this time, most other changes to
files in include/asm-generic tend to go through the tree of whoever
depends on the change.
Two patches are cleanups for stuff that is no longer needed,
the main change is to adapt the generic version of BUG_ON()
for CONFIG_BUG=n to make it behave consistently with BUG().
This avoids undefined behavior along with a number of warnings
about that undefined behavior in randconfig builds when
we keep going on after hitting a BUG_ON().
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Merge tag 'asm-generic-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic
Pull asm-generic updates from Arnd Bergmann:
"There are only three patches this time, most other changes to files in
include/asm-generic tend to go through the tree of whoever depends on
the change.
Two patches are cleanups for stuff that is no longer needed, the main
change is to adapt the generic version of BUG_ON() for CONFIG_BUG=n to
make it behave consistently with BUG().
This avoids undefined behavior along with a number of warnings about
that undefined behavior in randconfig builds when we keep going on
after hitting a BUG_ON()"
* tag 'asm-generic-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
asm-generic: remove old nonatomic-io wrapper files
asm-generic: default BUG_ON(x) to if(x)BUG()
asm-generic: page.h: Remove useless get_user_page and free_user_page
NAND:
* Add sunxi_nand randomizer support
* begin refactoring NAND ecclayout structs
* fix pxa3xx_nand dmaengine usage
* brcmnand: fix support for v7.1 controller
* add Qualcomm NAND controller driver
SPI NOR:
* add new ls1021a, ls2080a support to Freescale QuadSPI
* add new flash ID entries
* support bottom-block protection for Winbond flash
* support Status Register Write Protect
* remove broken QPI support for Micron SPI flash
JFFS2:
* improve post-mount CRC scan efficiency
General:
* refactor bcm63xxpart parser, to later extend for NAND
* add writebuf size parameter to mtdram
Other minor code quality improvements
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Merge tag 'for-linus-20160324' of git://git.infradead.org/linux-mtd
Pull MTD updates from Brian Norris:
"NAND:
- Add sunxi_nand randomizer support
- begin refactoring NAND ecclayout structs
- fix pxa3xx_nand dmaengine usage
- brcmnand: fix support for v7.1 controller
- add Qualcomm NAND controller driver
SPI NOR:
- add new ls1021a, ls2080a support to Freescale QuadSPI
- add new flash ID entries
- support bottom-block protection for Winbond flash
- support Status Register Write Protect
- remove broken QPI support for Micron SPI flash
JFFS2:
- improve post-mount CRC scan efficiency
General:
- refactor bcm63xxpart parser, to later extend for NAND
- add writebuf size parameter to mtdram
Other minor code quality improvements"
* tag 'for-linus-20160324' of git://git.infradead.org/linux-mtd: (72 commits)
mtd: nand: remove kerneldoc for removed function parameter
mtd: nand: Qualcomm NAND controller driver
dt/bindings: qcom_nandc: Add DT bindings
mtd: nand: don't select chip in nand_chip's block_bad op
mtd: spi-nor: support lock/unlock for a few Winbond chips
mtd: spi-nor: add TB (Top/Bottom) protect support
mtd: spi-nor: add SPI_NOR_HAS_LOCK flag
mtd: spi-nor: use BIT() for flash_info flags
mtd: spi-nor: disallow further writes to SR if WP# is low
mtd: spi-nor: make lock/unlock bounds checks more obvious and robust
mtd: spi-nor: silently drop lock/unlock for already locked/unlocked region
mtd: spi-nor: wait for SR_WIP to clear on initial unlock
mtd: nand: simplify nand_bch_init() usage
mtd: mtdswap: remove useless if (!mtd->ecclayout) test
mtd: create an mtd_oobavail() helper and make use of it
mtd: kill the ecclayout->oobavail field
mtd: nand: check status before reporting timeout
mtd: bcm63xxpart: give width specifier an 'int', not 'size_t'
mtd: mtdram: Add parameter for setting writebuf size
mtd: nand: pxa3xx_nand: kill unused field 'drcmr_cmd'
...
Pull parisc updates from Helge Deller:
"This patchset adds stack usage debug info for parisc and metag (on
both the stack grows upwards), switches to the new generic realative
extable search and sort routines, drops the long time ago removed
syscalls alloc_hugepages and free_hugepages and wires up the new
preadv2 and pwritev2 syscalls"
* 'parisc-4.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: Wire up preadv2 and pwritev2 syscalls
parisc: Use generic extable search and sort routines
parisc: Panic immediately when panic_on_oops
parisc,metag: Implement CONFIG_DEBUG_STACK_USAGE option
parisc: Drop alloc_hugepages and free_hugepages syscalls
Here are some final updates for ARM SoC specific dts files:
* The i.MX changes were sent relatively late, and had a dependency
on the clk tree, so I delayed that a bit. Support for the new
i.MX6qp SoC and a couple of new boards is added in this branch.
* Uniphier renames a few files to match the final product names
that were decided by the company, kudos to the kernel developer(s)
for getting support upstream before the product release.
Also two boards are added. The patches were posted early enough
and nice overall, but we forgot to apply them and decided to
give it some more time in linux-next
* at91 has two small bug fixes.
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Merge tag 'armsoc-dt2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull more ARM DT changes from Arnd Bergmann:
"Here are some final updates for ARM SoC specific dts files:
- The i.MX changes were sent relatively late, and had a dependency on
the clk tree, so I delayed that a bit. Support for the new i.MX6qp
SoC and a couple of new boards is added in this branch.
- Uniphier renames a few files to match the final product names that
were decided by the company, kudos to the kernel developer(s) for
getting support upstream before the product release. Also two
boards are added. The patches were posted early enough and nice
overall, but we forgot to apply them and decided to give it some
more time in linux-next
- at91 has two small bug fixes"
* tag 'armsoc-dt2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (83 commits)
ARM: dts: at91: sama5d4 Xplained: don't disable hsmci regulator
ARM: dts: at91: sama5d3 Xplained: don't disable hsmci regulator
ARM: dts: uniphier: add pinmux node for I2C ch4
ARM: dts: uniphier: add @{address} to EEPROM node
ARM: dts: uniphier: add PH1-Pro4 Sanji board support
ARM: dts: uniphier: add PH1-Pro4 Ace board support
ARM: dts: uniphier: enable I2C channel 2 of ProXstream2 Gentil board
ARM: dts: uniphier: add EEPROM node for ProXstream2 Gentil board
ARM: dts: uniphier: add reference clock nodes
ARM: dts: uniphier: rework UniPhier System Bus nodes
ARM: dts: uniphier: factor out ranges property of support card
arm64: dts: uniphier: rename PH1-LD10 to PH1-LD20
ARM: dts: imx53-qsb: Fix gpio button polarity
ARM: dts: vfxxx: Add DAC node for Vybrid SoC
ARM: dts: imx6q: add missing links between ipu2 and mipi dsi
ARM: dts: imx: Add support for Advantech/GE B850v3
ARM: dts: imx: Add support for Advantech/GE B650v3
ARM: dts: imx: Add support for Advantech/GE B450v3
ARM: dts: imx: Add support for Advantech/GE Bx50v3
ARM: dts: imx: Add Advantech BA-16 Qseven module
...
Some visible changes:
A new flag was added to distinguish traces done in NMI context.
Preempt tracer now shows functions where preemption is disabled but
interrupts are still enabled.
Other notes:
Updates were done to function tracing to allow better performance
with perf.
Infrastructure code has been added to allow for a new histogram
feature for recording live trace event histograms that can be
configured by simple user commands. The feature itself was just
finished, but needs a round in linux-next before being pulled.
This only includes some infrastructure changes that will be needed.
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Merge tag 'trace-v4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing updates from Steven Rostedt:
"Nothing major this round. Mostly small clean ups and fixes.
Some visible changes:
- A new flag was added to distinguish traces done in NMI context.
- Preempt tracer now shows functions where preemption is disabled but
interrupts are still enabled.
Other notes:
- Updates were done to function tracing to allow better performance
with perf.
- Infrastructure code has been added to allow for a new histogram
feature for recording live trace event histograms that can be
configured by simple user commands. The feature itself was just
finished, but needs a round in linux-next before being pulled.
This only includes some infrastructure changes that will be needed"
* tag 'trace-v4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (22 commits)
tracing: Record and show NMI state
tracing: Fix trace_printk() to print when not using bprintk()
tracing: Remove redundant reset per-CPU buff in irqsoff tracer
x86: ftrace: Fix the misleading comment for arch/x86/kernel/ftrace.c
tracing: Fix crash from reading trace_pipe with sendfile
tracing: Have preempt(irqs)off trace preempt disabled functions
tracing: Fix return while holding a lock in register_tracer()
ftrace: Use kasprintf() in ftrace_profile_tracefs()
ftrace: Update dynamic ftrace calls only if necessary
ftrace: Make ftrace_hash_rec_enable return update bool
tracing: Fix typoes in code comment and printk in trace_nop.c
tracing, writeback: Replace cgroup path to cgroup ino
tracing: Use flags instead of bool in trigger structure
tracing: Add an unreg_all() callback to trigger commands
tracing: Add needs_rec flag to event triggers
tracing: Add a per-event-trigger 'paused' field
tracing: Add get_syscall_name()
tracing: Add event record param to trigger_ops.func()
tracing: Make event trigger functions available
tracing: Make ftrace_event_field checking functions available
...
Pull irq fixes from Thomas Gleixner:
"A small set of fixes for the usual ARM/SOC irqchip drivers
- A set of fixes for mbigen to handle multiple devices in a hardware
module proper
- A cleanup for the mbigen config option which was pointlessly user
configurable.
- A cleanup for tegra replacing open coded functionality by the
proper core function
The config cleanup touches arch/arm64/Kconfig.platforms to select the
irq chip for the related platform"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/mbigen: Make CONFIG_HISILICON_IRQ_MBIGEN a hidden option
ARM64: Kconfig: Select mbigen interrupt controller on Hisilicon platform
irqchip/mbigen: Handle multiple device nodes in a mbigen module
irqchip/mbigen: Adjust DT bindings to handle multiple devices in a module
irqchip/tegra: Switch to use irq_domain_free_irqs_common
Pull perf fixes from Ingo Molnar:
"This tree contains various perf fixes on the kernel side, plus three
hw/event-enablement late additions:
- Intel Memory Bandwidth Monitoring events and handling
- the AMD Accumulated Power Mechanism reporting facility
- more IOMMU events
... and a final round of perf tooling updates/fixes"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (44 commits)
perf llvm: Use strerror_r instead of the thread unsafe strerror one
perf llvm: Use realpath to canonicalize paths
perf tools: Unexport some methods unused outside strbuf.c
perf probe: No need to use formatting strbuf method
perf help: Use asprintf instead of adhoc equivalents
perf tools: Remove unused perf_pathdup, xstrdup functions
perf tools: Do not include stringify.h from the kernel sources
tools include: Copy linux/stringify.h from the kernel
tools lib traceevent: Remove redundant CPU output
perf tools: Remove needless 'extern' from function prototypes
perf tools: Simplify die() mechanism
perf tools: Remove unused DIE_IF macro
perf script: Remove lots of unused arguments
perf thread: Rename perf_event__preprocess_sample_addr to thread__resolve
perf machine: Rename perf_event__preprocess_sample to machine__resolve
perf tools: Add cpumode to struct perf_sample
perf tests: Forward the perf_sample in the dwarf unwind test
perf tools: Remove misplaced __maybe_unused
perf list: Fix documentation of :ppp
perf bench numa: Fix assertion for nodes bitfield
...
- prevent the boards from having glitches when inserting/removing SD card on
sama5d3/d4 Xplained. The regulators should be kept on.
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Merge tag 'at91-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nferre/linux-at91 into next/dt2
Merge "First fixes batch for AT91 on 4.6 - DT only fixes" from Nicolas Ferre:
- prevent the boards from having glitches when inserting/removing SD card on
sama5d3/d4 Xplained. The regulators should be kept on.
* tag 'at91-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nferre/linux-at91:
ARM: dts: at91: sama5d4 Xplained: don't disable hsmci regulator
ARM: dts: at91: sama5d3 Xplained: don't disable hsmci regulator
ARM: dts: at91: sama5d2 Xplained: add leds node
ARM: dts: at91: sama5d2 Xplained: add user push button
ARM: dts: at91: sama5d2 Xplained: set pin muxing for usb gadget and usb host
ARM: dts: at91: sama5d2: add nand0 and nfc0 nodes
ARM: dts: at91: sama5d2: add dma properties to UART nodes
ARM: dts: at91: sama5d2 Xplained: Correct the macb irq pinctrl node
The clock is really the device functional clock, not the interface
clock. Rename it.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Currently we disable preemption in copy_to_user_page; a behaviour that
we inherited from the 32-bit arm code. This was necessary for older
cores without broadcast data cache maintenance, and ensured that cache
lines were dirtied and cleaned by the same CPU. On these systems dirty
cache line migration was not possible, so this was sufficient to
guarantee coherency.
On contemporary systems, cache coherence protocols permit (dirty) cache
lines to migrate between CPUs as a result of speculation, prefetching,
and other behaviours. To account for this, in ARMv8 data cache
maintenance operations are broadcast and affect all data caches in the
domain associated with the VA (i.e. ISH for kernel and user mappings).
In __switch_to we ensure that tasks can be safely migrated in the middle
of a maintenance sequence, using a dsb(ish) to ensure prior explicit
memory accesses are observed and cache maintenance operations are
completed before a task can be run on another CPU.
Given the above, it is not necessary to disable preemption in
copy_to_user_page. This patch removes the preempt_{disable,enable}
calls, permitting preemption.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Heiko Carstens