mirror of https://gitee.com/openkylin/linux.git
916747 Commits
| Author | SHA1 | Message | Date |
|---|---|---|---|
Eric Biggers
|
d2fe97545a |
fscrypt: fix all kerneldoc warnings
Fix all kerneldoc warnings in fs/crypto/ and include/linux/fscrypt.h.
Most of these were due to missing documentation for function parameters.
Detected with:
scripts/kernel-doc -v -none fs/crypto/*.{c,h} include/linux/fscrypt.h
This cleanup makes it possible to check new patches for kerneldoc
warnings without having to filter out all the existing ones.
For consistency, also adjust some function "brief descriptions" to
include the parentheses and to wrap at 80 characters. (The latter
matches the checkpatch expectation.)
Link: https://lore.kernel.org/r/20200511191358.53096-2-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
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Linus Torvalds
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2ef96a5bb1 | Linux 5.7-rc5 | |
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Linus Torvalds
|
c14cab2688 |
A set of fixes for x86:
- Ensure that direct mapping alias is always flushed when changing page
attributes. The optimization for small ranges failed to do so when
the virtual address was in the vmalloc or module space.
- Unbreak the trace event registration for syscalls without arguments
caused by the refactoring of the SYSCALL_DEFINE0() macro.
- Move the printk in the TSC deadline timer code to a place where it is
guaranteed to only be called once during boot and cannot be rearmed by
clearing warn_once after boot. If it's invoked post boot then lockdep
rightfully complains about a potential deadlock as the calling context
is different.
- A series of fixes for objtool and the ORC unwinder addressing variety
of small issues:
Stack offset tracking for indirect CFAs in objtool ignored subsequent
pushs and pops
Repair the unwind hints in the register clearing entry ASM code
Make the unwinding in the low level exit to usermode code stop after
switching to the trampoline stack. The unwind hint is not longer valid
and the ORC unwinder emits a warning as it can't find the registers
anymore.
Fix the unwind hints in switch_to_asm() and rewind_stack_do_exit()
which caused objtool to generate bogus ORC data.
Prevent unwinder warnings when dumping the stack of a non-current
task as there is no way to be sure about the validity because the
dumped stack can be a moving target.
Make the ORC unwinder behave the same way as the frame pointer
unwinder when dumping an inactive tasks stack and do not skip the
first frame.
Prevent ORC unwinding before ORC data has been initialized
Immediately terminate unwinding when a unknown ORC entry type is
found.
Prevent premature stop of the unwinder caused by IRET frames.
Fix another infinite loop in objtool caused by a negative offset which
was not catched.
Address a few build warnings in the ORC unwinder and add missing
static/ro_after_init annotations
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Merge tag 'x86-urgent-2020-05-10' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
"A set of fixes for x86:
- Ensure that direct mapping alias is always flushed when changing
page attributes. The optimization for small ranges failed to do so
when the virtual address was in the vmalloc or module space.
- Unbreak the trace event registration for syscalls without arguments
caused by the refactoring of the SYSCALL_DEFINE0() macro.
- Move the printk in the TSC deadline timer code to a place where it
is guaranteed to only be called once during boot and cannot be
rearmed by clearing warn_once after boot. If it's invoked post boot
then lockdep rightfully complains about a potential deadlock as the
calling context is different.
- A series of fixes for objtool and the ORC unwinder addressing
variety of small issues:
- Stack offset tracking for indirect CFAs in objtool ignored
subsequent pushs and pops
- Repair the unwind hints in the register clearing entry ASM code
- Make the unwinding in the low level exit to usermode code stop
after switching to the trampoline stack. The unwind hint is no
longer valid and the ORC unwinder emits a warning as it can't
find the registers anymore.
- Fix unwind hints in switch_to_asm() and rewind_stack_do_exit()
which caused objtool to generate bogus ORC data.
- Prevent unwinder warnings when dumping the stack of a
non-current task as there is no way to be sure about the
validity because the dumped stack can be a moving target.
- Make the ORC unwinder behave the same way as the frame pointer
unwinder when dumping an inactive tasks stack and do not skip
the first frame.
- Prevent ORC unwinding before ORC data has been initialized
- Immediately terminate unwinding when a unknown ORC entry type
is found.
- Prevent premature stop of the unwinder caused by IRET frames.
- Fix another infinite loop in objtool caused by a negative
offset which was not catched.
- Address a few build warnings in the ORC unwinder and add
missing static/ro_after_init annotations"
* tag 'x86-urgent-2020-05-10' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/unwind/orc: Move ORC sorting variables under !CONFIG_MODULES
x86/apic: Move TSC deadline timer debug printk
ftrace/x86: Fix trace event registration for syscalls without arguments
x86/mm/cpa: Flush direct map alias during cpa
objtool: Fix infinite loop in for_offset_range()
x86/unwind/orc: Fix premature unwind stoppage due to IRET frames
x86/unwind/orc: Fix error path for bad ORC entry type
x86/unwind/orc: Prevent unwinding before ORC initialization
x86/unwind/orc: Don't skip the first frame for inactive tasks
x86/unwind: Prevent false warnings for non-current tasks
x86/unwind/orc: Convert global variables to static
x86/entry/64: Fix unwind hints in rewind_stack_do_exit()
x86/entry/64: Fix unwind hints in __switch_to_asm()
x86/entry/64: Fix unwind hints in kernel exit path
x86/entry/64: Fix unwind hints in register clearing code
objtool: Fix stack offset tracking for indirect CFAs
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Linus Torvalds
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8b00083219 |
A single fix for objtool to prevent an infinite loop in the jump table
search which can be triggered when building the kernel with -ffunction-sections. -----BEGIN PGP SIGNATURE----- iQJHBAABCgAxFiEEQp8+kY+LLUocC4bMphj1TA10mKEFAl635X8THHRnbHhAbGlu dXRyb25peC5kZQAKCRCmGPVMDXSYod4AEACumK3x6NTRw7o889GU+Kzj/LfpJZOr QoKjZgo4AzeONa/5sKoBeNhGiHkuAOhhwG/yq9QrTMTw3b6kFPnQ8Vel590JM/uj j/qjgbpR5v2v0ULMbONEHBN/3dRETyFomAe88hg6WM7ZuNCXPd+rbya9XxD7LdQo K04y+vdPACJIf1hyb91sOWfyAWDHzwencNQ0qq0CMf72JpKFcRXCqor7vvH5zNH0 2PmTbKasOlyrgb9HQNLi6mNNoM47bc9lg8D76eDBl/Wl3yqYVwAawk4vqgwjxc0P MetoybQsWegi2dzmhjk61MIF8h6vw/NM6xuyiXSW7dHCN1GXzWGojuSVfzv0AEj2 0/xbRToSRWuPAvURGqiZ8GhBgG2ybHz+sDQyh/Cg4Jj2NulOLxy0lBngh5o/Dczh mLpqcJUd6I76bUSk+c0vehUqOEj0yAZm5Olo7gTkyoHlFSG0b2nShC1Km4TBM04A h5RTp/lBp++u1h4+w2EwyP8F6+chcpsyUQG1yEpz+GYoHsjYkA1gfx1rtD7uNKUI NwzVsuUEUt3UL4PPnjMMPYbOZb4R3vUjGFhgG5Se3D+2mNHkrvh+HA3WvUb5CUuW MSQ0e0K7Su3+M0/H+PQDKDPS/a0h3HtpZwaZt4gPkxnXNc5P7+c4Vyo28nttwF2O Ad08s6mVY8sDtA== =0+2v -----END PGP SIGNATURE----- Merge tag 'objtool-urgent-2020-05-10' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull objtool fix from Thomas Gleixner: "A single fix for objtool to prevent an infinite loop in the jump table search which can be triggered when building the kernel with '-ffunction-sections'" * tag 'objtool-urgent-2020-05-10' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: objtool: Fix infinite loop in find_jump_table() |
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Linus Torvalds
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bd2049f871 |
A single fix for the fallout of the recent futex uacess rework.
With those changes GCC9 fails to analyze arch_futex_atomic_op_inuser() correctly and emits a 'maybe unitialized' warning. While we usually ignore compiler stupidity the conditional store is pointless anyway because the correct case has to store. For the fault case the extra store does no harm. -----BEGIN PGP SIGNATURE----- iQJHBAABCgAxFiEEQp8+kY+LLUocC4bMphj1TA10mKEFAl635IgTHHRnbHhAbGlu dXRyb25peC5kZQAKCRCmGPVMDXSYoTQkEAChNFCVLyCNihKNDar4h0LhuChYSVow CRpnLFKTrxWpUemHYgOQM8FBFRjvVK3o3yhmp7qyWc1LnM4iYuGleP+FhfL5F1mk t0ANUMFAZOomy4348XXeVR/bq7RFpKrD68tsl0u3nC+NzykN4kCt3n8qN0CendbH +j9ILi2eNEbSIarC4gH228UuN0YIY5nC9ftW9oHJ+c/Z23X9RXstXhiH1TB9w99E 97G96WOdWjA+z7KzMF1REi/goJGxeZh0GQdz4iuR6vBNd4iR2V9hT3DqklUnSZPp +XGvaWaUH7yVa0etUdCtlBwmZ7Xq3h/N381khq9m6NfXdS8aZ7OavWyf+3urx7xz 6GtCIlo0QnIyqx5oe1/06zxQNgNAf0JAKIi5IDLFsr8SwfoWoG1Z6RrAYugyZurm 9RganJhVGrTXApi/9NUafhqHv7y9OE5UodRLpnKdnjei+/sE51xaIgx7Tr59Ao8n G3sMZkI/8GV9cQnKrg7qcN7kiJfyofoslnOigwm3hJaTMAn0fK9+Bx5YvJgVlyf2 SmE3saw3408/hhqkVWCW5GL8J+JEh/WDi6FCZ3Fu+L1UHalzqDGKAlhfmVxxDNmt tDbP4AUHbucmcWl98Ms0iKtfSwz1H0kTfkaHS0cvphIfH593S4FDJEiywiKsab7v 8nPUV2Bi6vZHxw== =Va5K -----END PGP SIGNATURE----- Merge tag 'locking-urgent-2020-05-10' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking fix from Thomas Gleixner: "A single fix for the fallout of the recent futex uacess rework. With those changes GCC9 fails to analyze arch_futex_atomic_op_inuser() correctly and emits a 'maybe unitialized' warning. While we usually ignore compiler stupidity the conditional store is pointless anyway because the correct case has to store. For the fault case the extra store does no harm" * tag 'locking-urgent-2020-05-10' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: ARM: futex: Address build warning |
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Linus Torvalds
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27d2dcb1b9 |
IOMMU Fixes for Linux v5.7-rc4
Including: - The race condition fixes for the AMD IOMMU driver. This are 5 patches fixing two race conditions around increase_address_space(). The first race condition was around the non-atomic update of the domain page-table root pointer and the variable containing the page-table depth (called mode). This is fixed now be merging page-table root and mode into one 64-bit field which is read/written atomically. The second race condition was around updating the page-table root pointer and making it public before the hardware caches were flushed. This could cause addresses to be mapped and returned to drivers which are not reachable by IOMMU hardware yet, causing IO page-faults. This is fixed too by adding the necessary flushes before a new page-table root is published. Related to the race condition fixes these patches also add a missing domain_flush_complete() barrier to update_domain() and a fix to bail out of the loop which tries to increase the address space when the call to increase_address_space() fails. Qian was able to trigger the race conditions under high load and memory pressure within a few days of testing. He confirmed that he has seen no issues anymore with the fixes included here. - Fix for a list-handling bug in the VirtIO IOMMU driver. -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEr9jSbILcajRFYWYyK/BELZcBGuMFAl638MYACgkQK/BELZcB GuOQxQ/5AYorgKuGkqVbob69YWZuSAEG08dlzDw4C8CDnPKXEPd0L4gJGLP7BpEh bPJo9QJtXW7zG6Hhk8sWk9/iONsThngoudaQrodJwaQRdCDGaDZlvBaezG2Vx4xb A2OrcM9lvQSODdgyf3x0O1cX7vkQ4J6nJR1Z8Fw4EufjH6TS9DR0tf8ZWHtIpHa6 Josu3M+qhUXPsn7KK5o7GtNib7sI4whLldYaASGsuaFGzod3CgA0cgmL2HfD+DWP k1EIEZTCaOq0BamtpyXbSA6o0AxwKERr/KONi1pL0xN4r0yCjsxEQ6+Rw4caqvgA zrfv3kk4a+wFAxOe0hUEtKk8Oy587LPJvIX4FnjG8hRnBrEaQC9vy4eMj05utPid PpsNQ35P+SyrxTlIp7ybIVhUvKbxih8SSpRsjx16vX+r/h4SRvWHzjpHVq/4+gIT TeZGw1g7xCIyjzn5HqLs/nMG/Ly9QHQaWia8slJJgbzI/deUXAVTy6PmMrqHB+zv e0PelKsq5lEQBrFX+r/Sg5hBViKaMykXKbXXg3KIolzlutJc2Rrzh4EEKpP/ug2/ upTXf+NvMobNxb3QLqn3IJApIirEGYQqI7lwjiUwTC5xb3EfYLUuRa5i4fbOAZIv krsVM4sNX1S32TblTMzDDOEEggPG1wPhVF5B+1emOolYHek3ShI= =gqwr -----END PGP SIGNATURE----- Merge tag 'iommu-fixes-v5.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu Pull iommu fixes from Joerg Roedel: - Race condition fixes for the AMD IOMMU driver. These are five patches fixing two race conditions around increase_address_space(). The first race condition was around the non-atomic update of the domain page-table root pointer and the variable containing the page-table depth (called mode). This is fixed now be merging page-table root and mode into one 64-bit field which is read/written atomically. The second race condition was around updating the page-table root pointer and making it public before the hardware caches were flushed. This could cause addresses to be mapped and returned to drivers which are not reachable by IOMMU hardware yet, causing IO page-faults. This is fixed too by adding the necessary flushes before a new page-table root is published. Related to the race condition fixes these patches also add a missing domain_flush_complete() barrier to update_domain() and a fix to bail out of the loop which tries to increase the address space when the call to increase_address_space() fails. Qian was able to trigger the race conditions under high load and memory pressure within a few days of testing. He confirmed that he has seen no issues anymore with the fixes included here. - Fix for a list-handling bug in the VirtIO IOMMU driver. * tag 'iommu-fixes-v5.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: iommu/virtio: Reverse arguments to list_add iommu/amd: Do not flush Device Table in iommu_map_page() iommu/amd: Update Device Table in increase_address_space() iommu/amd: Call domain_flush_complete() in update_domain() iommu/amd: Do not loop forever when trying to increase address space iommu/amd: Fix race in increase_address_space()/fetch_pte() |
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Linus Torvalds
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0a85ed6e7f |
block-5.7-2020-05-09
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Linus Torvalds
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e99332e7b4 |
gcc-10: mark more functions __init to avoid section mismatch warnings
It seems that for whatever reason, gcc-10 ends up not inlining a couple of functions that used to be inlined before. Even if they only have one single callsite - it looks like gcc may have decided that the code was unlikely, and not worth inlining. The code generation difference is harmless, but caused a few new section mismatch errors, since the (now no longer inlined) function wasn't in the __init section, but called other init functions: Section mismatch in reference from the function kexec_free_initrd() to the function .init.text:free_initrd_mem() Section mismatch in reference from the function tpm2_calc_event_log_size() to the function .init.text:early_memremap() Section mismatch in reference from the function tpm2_calc_event_log_size() to the function .init.text:early_memunmap() So add the appropriate __init annotation to make modpost not complain. In both cases there were trivially just a single callsite from another __init function. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Linus Torvalds
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2e28f3b13a |
RISC-V Fixes for 5.7-rc5
This contains a smattering of fixes and cleanups that I'd like to target for
5.7:
* Dead code removal.
* Exporting riscv_cpuid_to_hartid_mask for modules.
* Per-CPU tracking of ISA features.
* Setting max_pfn correctly when probing memory.
* Adding a note to the VDSO so glibc can check the kernel's version without a
uname().
* A fix to force the bootloader to initialize the boot spin tables, which still
get used as a fallback when SBI-0.1 is enabled.
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Merge tag 'riscv-for-linus-5.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Palmer Dabbelt:
"A smattering of fixes and cleanups:
- Dead code removal.
- Exporting riscv_cpuid_to_hartid_mask for modules.
- Per-CPU tracking of ISA features.
- Setting max_pfn correctly when probing memory.
- Adding a note to the VDSO so glibc can check the kernel's version
without a uname().
- A fix to force the bootloader to initialize the boot spin tables,
which still get used as a fallback when SBI-0.1 is enabled"
* tag 'riscv-for-linus-5.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
RISC-V: Remove unused code from STRICT_KERNEL_RWX
riscv: force __cpu_up_ variables to put in data section
riscv: add Linux note to vdso
riscv: set max_pfn to the PFN of the last page
RISC-V: Remove N-extension related defines
RISC-V: Add bitmap reprensenting ISA features common across CPUs
RISC-V: Export riscv_cpuid_to_hartid_mask() API
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Linus Torvalds
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1a263ae60b |
gcc-10: avoid shadowing standard library 'free()' in crypto
gcc-10 has started warning about conflicting types for a few new built-in functions, particularly 'free()'. This results in warnings like: crypto/xts.c:325:13: warning: conflicting types for built-in function ‘free’; expected ‘void(void *)’ [-Wbuiltin-declaration-mismatch] because the crypto layer had its local freeing functions called 'free()'. Gcc-10 is in the wrong here, since that function is marked 'static', and thus there is no chance of confusion with any standard library function namespace. But the simplest thing to do is to just use a different name here, and avoid this gcc mis-feature. [ Side note: gcc knowing about 'free()' is in itself not the mis-feature: the semantics of 'free()' are special enough that a compiler can validly do special things when seeing it. So the mis-feature here is that gcc thinks that 'free()' is some restricted name, and you can't shadow it as a local static function. Making the special 'free()' semantics be a function attribute rather than tied to the name would be the much better model ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Linus Torvalds
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adc7192096 |
gcc-10: disable 'restrict' warning for now
gcc-10 now warns about passing aliasing pointers to functions that take
restricted pointers.
That's actually a great warning, and if we ever start using 'restrict'
in the kernel, it might be quite useful. But right now we don't, and it
turns out that the only thing this warns about is an idiom where we have
declared a few functions to be "printf-like" (which seems to make gcc
pick up the restricted pointer thing), and then we print to the same
buffer that we also use as an input.
And people do that as an odd concatenation pattern, with code like this:
#define sysfs_show_gen_prop(buffer, fmt, ...) \
snprintf(buffer, PAGE_SIZE, "%s"fmt, buffer, __VA_ARGS__)
where we have 'buffer' as both the destination of the final result, and
as the initial argument.
Yes, it's a bit questionable. And outside of the kernel, people do have
standard declarations like
int snprintf( char *restrict buffer, size_t bufsz,
const char *restrict format, ... );
where that output buffer is marked as a restrict pointer that cannot
alias with any other arguments.
But in the context of the kernel, that 'use snprintf() to concatenate to
the end result' does work, and the pattern shows up in multiple places.
And we have not marked our own version of snprintf() as taking restrict
pointers, so the warning is incorrect for now, and gcc picks it up on
its own.
If we do start using 'restrict' in the kernel (and it might be a good
idea if people find places where it matters), we'll need to figure out
how to avoid this issue for snprintf and friends. But in the meantime,
this warning is not useful.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Linus Torvalds
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5a76021c2e |
gcc-10: disable 'stringop-overflow' warning for now
This is the final array bounds warning removal for gcc-10 for now. Again, the warning is good, and we should re-enable all these warnings when we have converted all the legacy array declaration cases to flexible arrays. But in the meantime, it's just noise. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Sagi Grimberg
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59c7c3caaa |
nvme: fix possible hang when ns scanning fails during error recovery
When the controller is reconnecting, the host fails I/O and admin commands as the host cannot reach the controller. ns scanning may revalidate namespaces during that period and it is wrong to remove namespaces due to these failures as we may hang (see |
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Alexey Dobriyan
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a8de663916 |
nvme-pci: fix "slimmer CQ head update"
Pre-incrementing ->cq_head can't be done in memory because OOB value
can be observed by another context.
This devalues space savings compared to original code :-\
$ ./scripts/bloat-o-meter ../vmlinux-000 ../obj/vmlinux
add/remove: 0/0 grow/shrink: 0/4 up/down: 0/-32 (-32)
Function old new delta
nvme_poll_irqdisable 464 456 -8
nvme_poll 455 447 -8
nvme_irq 388 380 -8
nvme_dev_disable 955 947 -8
But the code is minimal now: one read for head, one read for q_depth,
one increment, one comparison, single instruction phase bit update and
one write for new head.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reported-by: John Garry <john.garry@huawei.com>
Tested-by: John Garry <john.garry@huawei.com>
Fixes:
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Christoph Hellwig
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6bd87eec23 |
bdi: add a ->dev_name field to struct backing_dev_info
Cache a copy of the name for the life time of the backing_dev_info
structure so that we can reference it even after unregistering.
Fixes:
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Yufen Yu
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d51cfc53ad |
bdi: use bdi_dev_name() to get device name
Use the common interface bdi_dev_name() to get device name. Signed-off-by: Yufen Yu <yuyufen@huawei.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Add missing <linux/backing-dev.h> include BFQ Signed-off-by: Jens Axboe <axboe@kernel.dk> |
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Linus Torvalds
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44720996e2 |
gcc-10: disable 'array-bounds' warning for now
This is another fine warning, related to the 'zero-length-bounds' one,
but hitting the same historical code in the kernel.
Because C didn't historically support flexible array members, we have
code that instead uses a one-sized array, the same way we have cases of
zero-sized arrays.
The one-sized arrays come from either not wanting to use the gcc
zero-sized array extension, or from a slight convenience-feature, where
particularly for strings, the size of the structure now includes the
allocation for the final NUL character.
So with a "char name[1];" at the end of a structure, you can do things
like
v = my_malloc(sizeof(struct vendor) + strlen(name));
and avoid the "+1" for the terminator.
Yes, the modern way to do that is with a flexible array, and using
'offsetof()' instead of 'sizeof()', and adding the "+1" by hand. That
also technically gets the size "more correct" in that it avoids any
alignment (and thus padding) issues, but this is another long-term
cleanup thing that will not happen for 5.7.
So disable the warning for now, even though it's potentially quite
useful. Having a slew of warnings that then hide more urgent new issues
is not an improvement.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Linus Torvalds
|
5c45de21a2 |
gcc-10: disable 'zero-length-bounds' warning for now
This is a fine warning, but we still have a number of zero-length arrays in the kernel that come from the traditional gcc extension. Yes, they are getting converted to flexible arrays, but in the meantime the gcc-10 warning about zero-length bounds is very verbose, and is hiding other issues. I missed one actual build failure because it was hidden among hundreds of lines of warning. Thankfully I caught it on the second go before pushing things out, but it convinced me that I really need to disable the new warnings for now. We'll hopefully be all done with our conversion to flexible arrays in the not too distant future, and we can then re-enable this warning. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Linus Torvalds
|
78a5255ffb |
Stop the ad-hoc games with -Wno-maybe-initialized
We have some rather random rules about when we accept the "maybe-initialized" warnings, and when we don't. For example, we consider it unreliable for gcc versions < 4.9, but also if -O3 is enabled, or if optimizing for size. And then various kernel config options disabled it, because they know that they trigger that warning by confusing gcc sufficiently (ie PROFILE_ALL_BRANCHES). And now gcc-10 seems to be introducing a lot of those warnings too, so it falls under the same heading as 4.9 did. At the same time, we have a very straightforward way to _enable_ that warning when wanted: use "W=2" to enable more warnings. So stop playing these ad-hoc games, and just disable that warning by default, with the known and straight-forward "if you want to work on the extra compiler warnings, use W=123". Would it be great to have code that is always so obvious that it never confuses the compiler whether a variable is used initialized or not? Yes, it would. In a perfect world, the compilers would be smarter, and our source code would be simpler. That's currently not the world we live in, though. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Linus Torvalds
|
1d3962ae3b |
io_uring-5.7-2020-05-08
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Merge tag 'io_uring-5.7-2020-05-08' of git://git.kernel.dk/linux-block
Pull io_uring fixes from Jens Axboe:
- Fix finish_wait() balancing in file cancelation (Xiaoguang)
- Ensure early cleanup of resources in ring map failure (Xiaoguang)
- Ensure IORING_OP_SLICE does the right file mode checks (Pavel)
- Remove file opening from openat/openat2/statx, it's not needed and
messes with O_PATH
* tag 'io_uring-5.7-2020-05-08' of git://git.kernel.dk/linux-block:
io_uring: don't use 'fd' for openat/openat2/statx
splice: move f_mode checks to do_{splice,tee}()
io_uring: handle -EFAULT properly in io_uring_setup()
io_uring: fix mismatched finish_wait() calls in io_uring_cancel_files()
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Linus Torvalds
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d5eeab8d7e |
SCSI fixes on 20200508
Four minor fixes, all in drivers (qla2xxx, ibmvfc, ibmvscsi) Signed-off-by: James E.J. Bottomley <jejb@linux.ibm.com> -----BEGIN PGP SIGNATURE----- iJwEABMIAEQWIQTnYEDbdso9F2cI+arnQslM7pishQUCXrWUpiYcamFtZXMuYm90 dG9tbGV5QGhhbnNlbnBhcnRuZXJzaGlwLmNvbQAKCRDnQslM7pishaQbAQCus5pe D+e8jb8VzwbT+tr6HgPvaUOoSgrBJpXHy1oVFAEAwWuT9h4yHU8rsis5UR1MMh8F aTW9+wWDpdnTqoZN3iY= =fl/G -----END PGP SIGNATURE----- Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi Pull SCSI fixes from James Bottomley: "Four minor fixes, all in drivers (qla2xxx, ibmvfc, ibmvscsi)" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: ibmvscsi: Fix WARN_ON during event pool release scsi: ibmvfc: Don't send implicit logouts prior to NPIV login scsi: qla2xxx: Delete all sessions before unregister local nvme port scsi: qla2xxx: Fix hang when issuing nvme disconnect-all in NPIV |
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Linus Torvalds
|
eb24fdd8e6 |
Fixes for an endianness handling bug that prevented mounts on
big-endian arches, a spammy log message and a couple error paths. Also included a MAINTAINERS update. -----BEGIN PGP SIGNATURE----- iQFHBAABCAAxFiEEydHwtzie9C7TfviiSn/eOAIR84sFAl61ktUTHGlkcnlvbW92 QGdtYWlsLmNvbQAKCRBKf944AhHzi3yKB/9s0kZ7fLYtGzqtuoIjualsaM0lsBBS rWAN4BkIVsxp3eOd5Hdb+ngIY5ykLLcUd+4gKqUNHkB7/1upDq9ZURKlyTwel5Wy 889YEYESCVQQxPVY9KNvafaPeuR++2r9Thlp9hWyczrtvXtz80sFIrtO9TwDrj1P ZXPN3lxppGlxQiVNQfKIw2Cs78OxaNu9BthXZ7jN2OGaMQ0NU6sZ4LRXz8rbY+od AbfLEfwz4dPHQ/44k3rQg2IWNuOxRK+CNayxhuN0KWzock3MzGVYoYkPx0wNLiDx rntMscBqh3kppILZPEIeIA5Nv0yDAf4tf2hcUDf7GoJT/L/f9v7Q2SHa =75Ca -----END PGP SIGNATURE----- Merge tag 'ceph-for-5.7-rc5' of git://github.com/ceph/ceph-client Pull ceph fixes from Ilya Dryomov: "Fixes for an endianness handling bug that prevented mounts on big-endian arches, a spammy log message and a couple error paths. Also included a MAINTAINERS update" * tag 'ceph-for-5.7-rc5' of git://github.com/ceph/ceph-client: ceph: demote quotarealm lookup warning to a debug message MAINTAINERS: remove myself as ceph co-maintainer ceph: fix double unlock in handle_cap_export() ceph: fix special error code in ceph_try_get_caps() ceph: fix endianness bug when handling MDS session feature bits |
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Luis Henriques
|
12ae44a40a |
ceph: demote quotarealm lookup warning to a debug message
A misconfigured cephx can easily result in having the kernel client flooding the logs with: ceph: Can't lookup inode 1 (err: -13) Change this message to debug level. Cc: stable@vger.kernel.org URL: https://tracker.ceph.com/issues/44546 Signed-off-by: Luis Henriques <lhenriques@suse.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com> |
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Linus Torvalds
|
4334f30ebf |
Char/Misc driver fixes for 5.7-rc5
Here are some small driver fixes for 5.7-rc5 that resolve a number of
minor reported issues:
- mhi bus driver fixes found as people actually use the code
- phy driver fixes and compat string additions
- most driver fix due to link order changing when the core moved
out of staging
- mei driver fix
- interconnect build warning fix
All of these have been in linux-next for a while with no reported
issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-5.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver fixes from Greg KH:
"Here are some small driver fixes for 5.7-rc5 that resolve a number of
minor reported issues:
- mhi bus driver fixes found as people actually use the code
- phy driver fixes and compat string additions
- most driver fix due to link order changing when the core moved out
of staging
- mei driver fix
- interconnect build warning fix
All of these have been in linux-next for a while with no reported
issues"
* tag 'char-misc-5.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
bus: mhi: core: Fix channel device name conflict
bus: mhi: core: Fix typo in comment
bus: mhi: core: Offload register accesses to the controller
bus: mhi: core: Remove link_status() callback
bus: mhi: core: Make sure to powerdown if mhi_sync_power_up fails
bus: mhi: Fix parsing of mhi_flags
mei: me: disable mei interface on LBG servers.
phy: qualcomm: usb-hs-28nm: Prepare clocks in init
MAINTAINERS: Add Vinod Koul as Generic PHY co-maintainer
interconnect: qcom: Move the static keyword to the front of declaration
most: core: use function subsys_initcall()
bus: mhi: core: Fix a NULL vs IS_ERR check in mhi_create_devices()
phy: qcom-qusb2: Re add "qcom,sdm845-qusb2-phy" compat string
phy: tegra: Select USB_COMMON for usb_get_maximum_speed()
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Linus Torvalds
|
c61529f6f5 |
Driver core fixes for 5.7-rc5
Here are a number of small driver core fixes for 5.7-rc5 to resolve a bunch of reported issues with the current tree. Biggest here are the reverts and patches from John Stultz to resolve a bunch of deferred probe regressions we have been seeing in 5.7-rc right now. Along with those are some other smaller fixes: - coredump crash fix - devlink fix for when permissive mode was enabled - amba and platform device dma_parms fixes - component error silenced for when deferred probe happens 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----- iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCXrVnyg8cZ3JlZ0Brcm9h aC5jb20ACgkQMUfUDdst+ylWBgCfbwjUbsDsHsrsVgWfOakIaoPUQ8IAmwetMKvS ny1Kq7Cia+2y2e+7fDyo =UKEM -----END PGP SIGNATURE----- Merge tag 'driver-core-5.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core fixes from Greg KH: "Here are a number of small driver core fixes for 5.7-rc5 to resolve a bunch of reported issues with the current tree. Biggest here are the reverts and patches from John Stultz to resolve a bunch of deferred probe regressions we have been seeing in 5.7-rc right now. Along with those are some other smaller fixes: - coredump crash fix - devlink fix for when permissive mode was enabled - amba and platform device dma_parms fixes - component error silenced for when deferred probe happens All of these have been in linux-next for a while with no reported issues" * tag 'driver-core-5.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: regulator: Revert "Use driver_deferred_probe_timeout for regulator_init_complete_work" driver core: Ensure wait_for_device_probe() waits until the deferred_probe_timeout fires driver core: Use dev_warn() instead of dev_WARN() for deferred_probe_timeout warnings driver core: Revert default driver_deferred_probe_timeout value to 0 component: Silence bind error on -EPROBE_DEFER driver core: Fix handling of fw_devlink=permissive coredump: fix crash when umh is disabled amba: Initialize dma_parms for amba devices driver core: platform: Initialize dma_parms for platform devices |
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Linus Torvalds
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e7a1c733fe |
Staging driver fixes for 5.7-rc5
Here are 3 small driver fixes for 5.7-rc5. Two of these are documentation fixes: - MAINTAINERS update due to removed driver - removing Wolfram from the ks7010 driver TODO file The other patch is a real fix: - fix gasket driver to proper check the return value of a call 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----- iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCXrVm5w8cZ3JlZ0Brcm9h aC5jb20ACgkQMUfUDdst+ykXOACfXDClXrIByeSfMmVMbU/Kvi4Rh1YAoMV2tNh1 VOTuOopJJvjlp2tINkgL =KSsk -----END PGP SIGNATURE----- Merge tag 'staging-5.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging Pull staging driver fixes from Greg KH: "Here are three small driver fixes for 5.7-rc5. Two of these are documentation fixes: - MAINTAINERS update due to removed driver - removing Wolfram from the ks7010 driver TODO file The other patch is a real fix: - fix gasket driver to proper check the return value of a call All of these have been in linux-next for a while with no reported issues" * tag 'staging-5.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: staging: gasket: Check the return value of gasket_get_bar_index() staging: ks7010: remove me from CC list MAINTAINERS: remove entry after hp100 driver removal |
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Linus Torvalds
|
cbd0e48213 |
TTY/Serial fixes for 5.7-rc5
Here are 3 small TTY/Serial/VT fixes for 5.7-rc5: - revert for the bcm63xx driver "fix" that was incorrect - vt unicode console bugfix - xilinx_uartps console driver fix All of these have been in linux next with no reported issues Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCXrVmRg8cZ3JlZ0Brcm9h aC5jb20ACgkQMUfUDdst+ymY+ACfelBeBAxlYjuvZ8QpDYSkR9fl8EIAoKeuJocX TaXtUFCvCSax68siL81w =L0Rp -----END PGP SIGNATURE----- Merge tag 'tty-5.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty/serial fixes from Greg KH: "Here are three small TTY/Serial/VT fixes for 5.7-rc5: - revert for the bcm63xx driver "fix" that was incorrect - vt unicode console bugfix - xilinx_uartps console driver fix All of these have been in linux next with no reported issues" * tag 'tty-5.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: tty: xilinx_uartps: Fix missing id assignment to the console vt: fix unicode console freeing with a common interface Revert "tty: serial: bcm63xx: fix missing clk_put() in bcm63xx_uart" |
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Linus Torvalds
|
0a0b96b2e2 |
USB fixes for 5.7-rc5
Here are some small USB fixes for 5.7-rc5 to resolve some reported issues: - syzbot found problems fixed - usbfs dma mapping fix - typec bugfixs - chipidea bugfix - usb4/thunderbolt fix - new device ids/quirks 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----- iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCXrVlxQ8cZ3JlZ0Brcm9h aC5jb20ACgkQMUfUDdst+ynyPwCgtPF0qX7DbP3RwhPGoy3YCPNlsXMAoJT2T+CH 6MuNazbkAv6GcqAW/50i =Viyi -----END PGP SIGNATURE----- Merge tag 'usb-5.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB fixes from Greg KH: "Here are some small USB fixes for 5.7-rc5 to resolve some reported issues: - syzbot found problems fixed - usbfs dma mapping fix - typec bugfixs - chipidea bugfix - usb4/thunderbolt fix - new device ids/quirks All of these have been in linux-next for a while with no reported issues" * tag 'usb-5.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: usb: chipidea: msm: Ensure proper controller reset using role switch API usb: typec: mux: intel: Handle alt mode HPD_HIGH usb: usbfs: correct kernel->user page attribute mismatch usb: typec: intel_pmc_mux: Fix the property names USB: core: Fix misleading driver bug report USB: serial: qcserial: Add DW5816e support USB: uas: add quirk for LaCie 2Big Quadra thunderbolt: Check return value of tb_sw_read() in usb4_switch_op() USB: serial: garmin_gps: add sanity checking for data length |
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Linus Torvalds
|
775a8e0316 |
drm fixes for 5.7-rc5
hdcp: - fix HDCP regression amdgpu: - Runtime PM fixes - DC fix for PPC - Misc DC fixes virtio: - fix context ordering issue sun4i: - old gcc warning fix ingenic-drm: - missing module support -----BEGIN PGP SIGNATURE----- iQIcBAABAgAGBQJetOwdAAoJEAx081l5xIa+7ewQAJTkOQL4mT0mmPBGKgMd8vDL vf0rdVIFcdU4cktP8aM+CDawTqazpnliQF7+JwFy/JAqlyGRxhTRO7OGAYKaqG4z bGG5PpZl17MvzfHSJjpPnherkBF8Afx55hcP0SH1yv6mShEtVNG3PWZijP/rMtam lSJNSHwPR9OgB4ikX2Ra6aOkdL7BOJjnO57yrLhsiKsOCpCzVflN2lG5LrlGrckJ AxbKOAKff/CBphzVpjNUPg2/6++KvixlZGKX+vVCrzyWdOgszuwJGApRh0VwlTU+ rlr+wEjIcEEt0TqnLyTUdUJ7ddsJulARkojwkh4eD6fYeJ6n9h60PDV1mQZgR0as XnsmOMkfr/dX2RTGGMdEjlZ9gep5YB02VZ2JRSCMha1oN+kcceomNxo0KXMjgR2o erZhuIcitwC8N30pmpZPcrnGpEkhWsmxeJxigEDmTFegi6ZOKq3g45xCnR4GHash Hz78dZoauIbmMeKxp5VeG238GKyErnFXjsXEwaLhw3GOBDkkHtn3TFVHbiLGdRnR G4VQ3nU3SpH3dEGKCNrApBet/CYIk8tmR1rznqQuCnezz5YttekKpIaK481JbX7C dtSMy5St9SHAyW8uaWPGZoz80+mn4Best0x+2bY2rVLV092pE09ltojU2XAwTzmW 00b8KizTlFigmV44Y6K1 =0Axh -----END PGP SIGNATURE----- Merge tag 'drm-fixes-2020-05-08' of git://anongit.freedesktop.org/drm/drm Pull drm fixes from Dave Airlie: "Another pretty normal week. I didn't get any i915 fixes yet, so next week I'd expect double the usual i915, but otherwise a bunch of amdgpu and some scattered other fixes. hdcp: - fix HDCP regression amdgpu: - Runtime PM fixes - DC fix for PPC - Misc DC fixes virtio: - fix context ordering issue sun4i: - old gcc warning fix ingenic-drm: - missing module support" * tag 'drm-fixes-2020-05-08' of git://anongit.freedesktop.org/drm/drm: drm/amd/display: Prevent dpcd reads with passive dongles drm/amd/display: fix counter in wait_for_no_pipes_pending drm/amd/display: Update DCN2.1 DV Code Revision drm: Fix HDCP failures when SRM fw is missing sun6i: dsi: fix gcc-4.8 drm: ingenic-drm: add MODULE_DEVICE_TABLE drm/virtio: create context before RESOURCE_CREATE_2D in 3D mode drm/amd/display: work around fp code being emitted outside of DC_FP_START/END drm/amdgpu/dc: Use WARN_ON_ONCE for ASSERT drm/amdgpu: drop redundant cg/pg ungate on runpm enter drm/amdgpu: move kfd suspend after ip_suspend_phase1 |
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Linus Torvalds
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af38553c66 |
Merge branch 'akpm' (patches from Andrew)
Merge misc fixes from Andrew Morton: "14 fixes and one selftest to verify the ipc fixes herein" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: mm: limit boost_watermark on small zones ubsan: disable UBSAN_ALIGNMENT under COMPILE_TEST mm/vmscan: remove unnecessary argument description of isolate_lru_pages() epoll: atomically remove wait entry on wake up kselftests: introduce new epoll60 testcase for catching lost wakeups percpu: make pcpu_alloc() aware of current gfp context mm/slub: fix incorrect interpretation of s->offset scripts/gdb: repair rb_first() and rb_last() eventpoll: fix missing wakeup for ovflist in ep_poll_callback arch/x86/kvm/svm/sev.c: change flag passed to GUP fast in sev_pin_memory() scripts/decodecode: fix trapping instruction formatting kernel/kcov.c: fix typos in kcov_remote_start documentation mm/page_alloc: fix watchdog soft lockups during set_zone_contiguous() mm, memcg: fix error return value of mem_cgroup_css_alloc() ipc/mqueue.c: change __do_notify() to bypass check_kill_permission() |
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Julia Lawall
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fb3637a113 |
iommu/virtio: Reverse arguments to list_add
Elsewhere in the file, there is a list_for_each_entry with
&vdev->resv_regions as the second argument, suggesting that
&vdev->resv_regions is the list head. So exchange the
arguments on the list_add call to put the list head in the
second argument.
Fixes:
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Dave Airlie
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a9fe6f18cd |
A few minor fixes for an ordering issue in virtio, an (old) gcc warning
in sun4i, a probe issue in ingenic-drm and a regression in the HDCP support. -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRcEzekXsqa64kGDp7j7w1vZxhRxQUCXrQvBQAKCRDj7w1vZxhR xQuSAQCvccp3LESycSTuQU0GFlh+flhb8lBZJkfjr2RC6SUggAD/ZmHsHdYIsMNq PT7BmulDo9oRn1aHGzNY43K9U9W4Rgw= =uSqQ -----END PGP SIGNATURE----- Merge tag 'drm-misc-fixes-2020-05-07' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes A few minor fixes for an ordering issue in virtio, an (old) gcc warning in sun4i, a probe issue in ingenic-drm and a regression in the HDCP support. Signed-off-by: Dave Airlie <airlied@redhat.com> From: Maxime Ripard <maxime@cerno.tech> Link: https://patchwork.freedesktop.org/patch/msgid/20200507160130.id64niqgf5wsha4u@gilmour.lan |
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Dave Airlie
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c61b0b97ef |
Merge tag 'amd-drm-fixes-5.7-2020-05-06' of git://people.freedesktop.org/~agd5f/linux into drm-fixes
amd-drm-fixes-5.7-2020-05-06: amdgpu: - Runtime PM fixes - DC fix for PPC - Misc DC fixes Signed-off-by: Dave Airlie <airlied@redhat.com> From: Alex Deucher <alexdeucher@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200506212257.3893-1-alexander.deucher@amd.com |
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Linus Torvalds
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79dede78c0 |
Merge branch 'for-v5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
Pull security subsystem fix from James Morris: "Fix the default value of fs_context_parse_param hook" * 'for-v5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: security: Fix the default value of fs_context_parse_param hook |
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Henry Willard
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14f69140ff |
mm: limit boost_watermark on small zones
Commit |
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Kees Cook
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8d58f222e8 |
ubsan: disable UBSAN_ALIGNMENT under COMPILE_TEST
The documentation for UBSAN_ALIGNMENT already mentions that it should
not be used on all*config builds (and for efficient-unaligned-access
architectures), so just refactor the Kconfig to correctly implement this
so randconfigs will stop creating insane images that freak out objtool
under CONFIG_UBSAN_TRAP (due to the false positives producing functions
that never return, etc).
Link: http://lkml.kernel.org/r/202005011433.C42EA3E2D@keescook
Fixes:
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Qiwu Chen
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17e34526f0 |
mm/vmscan: remove unnecessary argument description of isolate_lru_pages()
Since commit
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Roman Penyaev
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412895f03c |
epoll: atomically remove wait entry on wake up
This patch does two things: - fixes a lost wakeup introduced by commit |
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Roman Penyaev
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474328c06e |
kselftests: introduce new epoll60 testcase for catching lost wakeups
This test case catches lost wake up introduced by commit
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Filipe Manana
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28307d938f |
percpu: make pcpu_alloc() aware of current gfp context
Since 5.7-rc1, on btrfs we have a percpu counter initialization for
which we always pass a GFP_KERNEL gfp_t argument (this happens since
commit
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Waiman Long
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cbfc35a486 |
mm/slub: fix incorrect interpretation of s->offset
In a couple of places in the slub memory allocator, the code uses "s->offset" as a check to see if the free pointer is put right after the object. That check is no longer true with commit |
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Aymeric Agon-Rambosson
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50e36be1fb |
scripts/gdb: repair rb_first() and rb_last()
The current implementations of the rb_first() and rb_last() gdb functions have a variable that references itself in its instanciation, which causes the function to throw an error if a specific condition on the argument is met. The original author rather intended to reference the argument and made a typo. Referring the argument instead makes the function work as intended. Signed-off-by: Aymeric Agon-Rambosson <aymeric.agon@yandex.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Stephen Boyd <swboyd@chromium.org> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Douglas Anderson <dianders@chromium.org> Cc: Nikolay Borisov <n.borisov.lkml@gmail.com> Cc: Jackie Liu <liuyun01@kylinos.cn> Cc: Jason Wessel <jason.wessel@windriver.com> Link: http://lkml.kernel.org/r/20200427051029.354840-1-aymeric.agon@yandex.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Khazhismel Kumykov
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0c54a6a44b |
eventpoll: fix missing wakeup for ovflist in ep_poll_callback
In the event that we add to ovflist, before commit |
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Janakarajan Natarajan
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996ed22c7a |
arch/x86/kvm/svm/sev.c: change flag passed to GUP fast in sev_pin_memory()
When trying to lock read-only pages, sev_pin_memory() fails because FOLL_WRITE is used as the flag for get_user_pages_fast(). Commit |
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Ivan Delalande
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e08df079b2 |
scripts/decodecode: fix trapping instruction formatting
If the trapping instruction contains a ':', for a memory access through
segment registers for example, the sed substitution will insert the '*'
marker in the middle of the instruction instead of the line address:
2b: 65 48 0f c7 0f cmpxchg16b %gs:*(%rdi) <-- trapping instruction
I started to think I had forgotten some quirk of the assembly syntax
before noticing that it was actually coming from the script. Fix it to
add the address marker at the right place for these instructions:
28: 49 8b 06 mov (%r14),%rax
2b:* 65 48 0f c7 0f cmpxchg16b %gs:(%rdi) <-- trapping instruction
30: 0f 94 c0 sete %al
Fixes:
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Maciej Grochowski
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324cfb1956 |
kernel/kcov.c: fix typos in kcov_remote_start documentation
Signed-off-by: Maciej Grochowski <maciej.grochowski@pm.me> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Andrey Konovalov <andreyknvl@google.com> Link: http://lkml.kernel.org/r/20200420030259.31674-1-maciek.grochowski@gmail.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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David Hildenbrand
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e84fe99b68 |
mm/page_alloc: fix watchdog soft lockups during set_zone_contiguous()
Without CONFIG_PREEMPT, it can happen that we get soft lockups detected, e.g., while booting up. watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [swapper/0:1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.6.0-next-20200331+ #4 Hardware name: Red Hat KVM, BIOS 1.11.1-4.module+el8.1.0+4066+0f1aadab 04/01/2014 RIP: __pageblock_pfn_to_page+0x134/0x1c0 Call Trace: set_zone_contiguous+0x56/0x70 page_alloc_init_late+0x166/0x176 kernel_init_freeable+0xfa/0x255 kernel_init+0xa/0x106 ret_from_fork+0x35/0x40 The issue becomes visible when having a lot of memory (e.g., 4TB) assigned to a single NUMA node - a system that can easily be created using QEMU. Inside VMs on a hypervisor with quite some memory overcommit, this is fairly easy to trigger. Signed-off-by: David Hildenbrand <david@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Pavel Tatashin <pasha.tatashin@soleen.com> Reviewed-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Reviewed-by: Baoquan He <bhe@redhat.com> Reviewed-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Kirill Tkhai <ktkhai@virtuozzo.com> Cc: Shile Zhang <shile.zhang@linux.alibaba.com> Cc: Pavel Tatashin <pasha.tatashin@soleen.com> Cc: Daniel Jordan <daniel.m.jordan@oracle.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Alexander Duyck <alexander.duyck@gmail.com> Cc: Baoquan He <bhe@redhat.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: <stable@vger.kernel.org> Link: http://lkml.kernel.org/r/20200416073417.5003-1-david@redhat.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Yafang Shao
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11d6761218 |
mm, memcg: fix error return value of mem_cgroup_css_alloc()
When I run my memcg testcase which creates lots of memcgs, I found
there're unexpected out of memory logs while there're still enough
available free memory. The error log is
mkdir: cannot create directory 'foo.65533': Cannot allocate memory
The reason is when we try to create more than MEM_CGROUP_ID_MAX memcgs,
an -ENOMEM errno will be set by mem_cgroup_css_alloc(), but the right
errno should be -ENOSPC "No space left on device", which is an
appropriate errno for userspace's failed mkdir.
As the errno really misled me, we should make it right. After this
patch, the error log will be
mkdir: cannot create directory 'foo.65533': No space left on device
[akpm@linux-foundation.org: s/EBUSY/ENOSPC/, per Michal]
[akpm@linux-foundation.org: s/EBUSY/ENOSPC/, per Michal]
Fixes:
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Oleg Nesterov
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b5f2006144 |
ipc/mqueue.c: change __do_notify() to bypass check_kill_permission()
Commit |
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Linus Torvalds
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192ffb7515 |
This includes the following tracing fixes:
- Fix bootconfig causing kernels to fail with CONFIG_BLK_DEV_RAM enabled
- Fix allocation leaks in bootconfig tool
- Fix a double initialization of a variable
- Fix API bootconfig usage from kprobe boot time events
- Reject NULL location for kprobes
- Fix crash caused by preempt delay module not cleaning up kthread
correctly
- Add vmalloc_sync_mappings() to prevent x86_64 page faults from
recursively faulting from tracing page faults
- Fix comment in gpu/trace kerneldoc header
- Fix documentation of how to create a trace event class
- Make the local tracing_snapshot_instance_cond() function static
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Merge tag 'trace-v5.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fixes from Steven Rostedt:
- Fix bootconfig causing kernels to fail with CONFIG_BLK_DEV_RAM
enabled
- Fix allocation leaks in bootconfig tool
- Fix a double initialization of a variable
- Fix API bootconfig usage from kprobe boot time events
- Reject NULL location for kprobes
- Fix crash caused by preempt delay module not cleaning up kthread
correctly
- Add vmalloc_sync_mappings() to prevent x86_64 page faults from
recursively faulting from tracing page faults
- Fix comment in gpu/trace kerneldoc header
- Fix documentation of how to create a trace event class
- Make the local tracing_snapshot_instance_cond() function static
* tag 'trace-v5.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tools/bootconfig: Fix resource leak in apply_xbc()
tracing: Make tracing_snapshot_instance_cond() static
tracing: Fix doc mistakes in trace sample
gpu/trace: Minor comment updates for gpu_mem_total tracepoint
tracing: Add a vmalloc_sync_mappings() for safe measure
tracing: Wait for preempt irq delay thread to finish
tracing/kprobes: Reject new event if loc is NULL
tracing/boottime: Fix kprobe event API usage
tracing/kprobes: Fix a double initialization typo
bootconfig: Fix to remove bootconfig data from initrd while boot
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