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8238b4579866b7c1bb99883cfe102a43db5506ff
linux/include/asm-generic
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Mikulas Patocka 8238b45798 wait_on_bit: add an acquire memory barrier 
There are several places in the kernel where wait_on_bit is not followed
by a memory barrier (for example, in drivers/md/dm-bufio.c:new_read).

On architectures with weak memory ordering, it may happen that memory
accesses that follow wait_on_bit are reordered before wait_on_bit and
they may return invalid data.

Fix this class of bugs by introducing a new function "test_bit_acquire"
that works like test_bit, but has acquire memory ordering semantics.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Acked-by: Will Deacon <will@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-08-26 09:30:25 -07:00
..
bitops
wait_on_bit: add an acquire memory barrier
2022-08-26 09:30:25 -07:00
vdso
lib/vdso: Avoid highres update if clocksource is not VDSO capable
2020-02-17 20:12:17 +01:00
access_ok.h
uaccess: remove CONFIG_SET_FS
2022-02-25 09:36:06 +01:00
archrandom.h
random: handle archrandom with multiple longs
2022-07-25 13:26:14 +02:00
asm-offsets.h
asm-generic: Add common asm-offsets.h
2015-06-23 13:35:49 +09:00
asm-prototypes.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
atomic64.h
locking/atomic: delete !ARCH_ATOMIC remnants
2021-05-26 13:20:52 +02:00
atomic.h
locking/atomic: delete !ARCH_ATOMIC remnants
2021-05-26 13:20:52 +02:00
audit_change_attr.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
audit_dir_write.h
audit: Avoid build failures on systems without renameat
2018-01-30 19:07:54 -08:00
audit_read.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
audit_signal.h
[PATCH] add SIGNAL syscall class (v3)
2007-05-11 05:38:25 -04:00
audit_write.h
Merge tag 'audit-pr-20171113' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit
2017-11-15 13:28:48 -08:00
barrier.h
asm-generic: Add memory barrier dma_mb()
2022-06-23 18:34:58 +01:00
bitops.h
include: move find.h from asm_generic to linux
2022-01-15 08:47:31 -08:00
bitsperlong.h
lib: extend the scope of small_const_nbits() macro
2021-05-06 19:24:11 -07:00
bug.h
bug: Have __warn() prototype defined unconditionally
2022-04-26 10:59:57 +02:00
bugs.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
cache.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
cacheflush.h
Add linux/cacheflush.h
2021-11-17 10:36:15 -05:00
checksum.h
unify generic instances of csum_partial_copy_nocheck()
2020-08-20 15:45:14 -04:00
cmpxchg-local.h
locking/atomic: cmpxchg: make generic a prefix
2021-05-26 13:20:50 +02:00
cmpxchg.h
locking/atomic: delete !ARCH_ATOMIC remnants
2021-05-26 13:20:52 +02:00
compat.h
riscv: compat: syscall: Add compat_sys_call_table implementation
2022-04-26 13:36:25 -07:00
current.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
delay.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
device.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428
2019-06-05 17:37:16 +02:00
div64.h
ARM: 9117/1: asm-generic: div64: Remove always-true __div64_const32_is_OK()
2021-08-20 11:39:28 +01:00
dma-mapping.h
dma-mapping: bypass indirect calls for dma-direct
2018-12-13 21:06:18 +01:00
dma.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
early_ioremap.h
mm/early_ioremap.c: remove redundant early_ioremap_shutdown()
2021-09-08 11:50:24 -07:00
emergency-restart.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
error-injection.h
asm-generic/error-injection.h: fix a spelling mistake, and a coding style issue
2021-12-17 14:12:14 +01:00
exec.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36
2019-05-24 17:27:11 +02:00
export.h
kbuild: link symbol CRCs at final link, removing CONFIG_MODULE_REL_CRCS
2022-05-24 16:33:20 +09:00
extable.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
fb.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
fixmap.h
mm: introduce common STRUCT_PAGE_MAX_SHIFT define
2018-12-14 15:05:45 -08:00
flat.h
binfmt_flat: remove the persistent argument from flat_get_addr_from_rp
2019-06-24 09:16:47 +10:00
ftrace.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
futex.h
futex: Fix additional regressions
2021-12-11 23:31:51 +01:00
getorder.h
asm-generic: force inlining of get_order() to work around gcc10 poor decision
2020-12-15 22:46:15 -08:00
gpio.h
gpio: Avoid kernel.h inclusion where it's possible
2020-02-10 12:58:36 +01:00
hardirq.h
irqstat: Move declaration into asm-generic/hardirq.h
2020-11-23 10:31:06 +01:00
hugetlb.h
mm: change huge_ptep_clear_flush() to return the original pte
2022-05-13 16:48:55 -07:00
hw_irq.h
asm-generic: add legacy I/O header files
2009-06-11 21:02:42 +02:00
hyperv-tlfs.h
KVM: x86: Add checks for reserved-to-zero Hyper-V hypercall fields
2022-02-10 13:50:36 -05:00
ide_iops.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
int-ll64.h
int-ll64.h: define u{8,16,32,64} and s{8,16,32,64} based on uapi header
2018-06-07 17:34:38 -07:00
io.h
Merge tag 'asm-generic-6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic
2022-08-05 10:07:23 -07:00
ioctl.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
iomap.h
parisc: Declare pci_iounmap() parisc version only when CONFIG_PCI enabled
2021-09-19 10:36:09 -07:00
irq_regs.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
irq_work.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
irq.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
irqflags.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
Kbuild
Merge tag 'for-linus-6.0-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
2022-08-04 15:10:55 -07:00
kdebug.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
kmap_size.h
mm/highmem: Provide and use CONFIG_DEBUG_KMAP_LOCAL
2020-11-24 14:42:08 +01:00
kprobes.h
treewide: Convert macro and uses of __section(foo) to __section("foo")
2020-10-25 14:51:49 -07:00
kvm_para.h
KVM: Introduce paravirtualization hints and KVM_HINTS_DEDICATED
2018-03-06 18:40:44 +01:00
kvm_types.h
KVM: Move x86's version of struct kvm_mmu_memory_cache to common code
2020-07-09 13:29:42 -04:00
linkage.h
asm-generic: add generic versions of common headers
2009-06-11 21:02:37 +02:00
local64.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
local.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
logic_io.h
logic_io instance of iounmap() needs volatile on argument
2021-12-21 21:31:08 +01:00
mcs_spinlock.h
locking/mcs: Allow architecture specific asm files to be used for contended case
2014-02-09 21:18:52 +01:00
memory_model.h
mm: remove CONFIG_DISCONTIGMEM
2021-06-29 10:53:55 -07:00
mm_hooks.h
mm: remove arch_bprm_mm_init() hook
2020-01-23 10:41:16 -08:00
mmiowb_types.h
asm-generic/mmiowb: Add generic implementation of mmiowb() tracking
2019-04-08 11:59:39 +01:00
mmiowb.h
asm-generic/mmiowb: Allow mmiowb_set_pending() when preemptible()
2020-07-17 10:02:03 +01:00
mmu_context.h
asm-generic: add generic MMU versions of mmu context functions
2020-10-26 16:45:03 +01:00
mmu.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
module.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
module.lds.h
kbuild: preprocess module linker script
2020-09-25 00:36:41 +09:00
mshyperv.h
Drivers: hv: vmbus: Propagate VMbus coherence to each VMbus device
2022-03-29 12:12:50 +00:00
msi.h
Merge tag 'irq-core-2020-12-15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-12-15 15:03:31 -08:00
nommu_context.h
asm-generic: add generic MMU versions of mmu context functions
2020-10-26 16:45:03 +01:00
numa.h
numa: Move numa implementation to common code
2021-01-14 15:08:55 -08:00
page.h
c6x: remove architecture
2021-01-20 09:30:45 +01:00
param.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
parport.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
pci_iomap.h
PCI: Stub __pci_ioport_map() for arches that don't support it at all
2022-07-29 12:01:00 -05:00
pci.h
asm-generic: Add new pci.h and use it
2022-07-22 17:34:57 -05:00
percpu.h
asm-generic: percpu: avoid Wshadow warning
2020-10-26 23:54:48 +00:00
pgalloc.h
asm-generic: Prepare for riscv use of pud_alloc_one and pud_free
2022-01-19 17:54:08 -08:00
pgtable_uffd.h
userfaultfd: wp: add pmd_swp_*uffd_wp() helpers
2020-04-07 10:43:39 -07:00
pgtable-nop4d.h
mm: rename p4d_page_vaddr to p4d_pgtable and make it return pud_t *
2021-07-08 11:48:22 -07:00
pgtable-nopmd.h
riscv/mm: fix two page table check related issues
2022-05-19 14:08:48 -07:00
pgtable-nopud.h
mm: rename p4d_page_vaddr to p4d_pgtable and make it return pud_t *
2021-07-08 11:48:22 -07:00
preempt.h
sched/core: Initialize the idle task with preemption disabled
2021-05-12 13:01:45 +02:00
qrwlock_types.h
locking/qrwlock: Change "queue rwlock" to "queued rwlock"
2022-05-11 16:27:04 +02:00
qrwlock.h
Merge tag 'asm-generic-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic
2022-05-26 10:50:30 -07:00
qspinlock_types.h
locking/qspinlock: Do not include atomic.h from qspinlock_types.h
2020-07-29 16:14:19 +02:00
qspinlock.h
asm-generic: qspinlock: Indicate the use of mixed-size atomics
2022-05-11 11:49:47 -07:00
resource.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
rwonce.h
asm/rwonce: Don't pull <asm/barrier.h> into 'asm-generic/rwonce.h'
2020-07-21 10:50:36 +01:00
seccomp.h
seccomp: Use -1 marker for end of mode 1 syscall list
2020-07-10 16:01:52 -07:00
sections.h
asm-generic: Refactor dereference_[kernel]_function_descriptor()
2022-02-16 23:25:11 +11:00
serial.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
set_memory.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
shmparam.h
treewide: remove SPDX "WITH Linux-syscall-note" from kernel-space headers
2019-05-14 19:52:48 -07:00
signal.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
simd.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
softirq_stack.h
arch/*: Disable softirq stacks on PREEMPT_RT.
2022-06-15 17:40:59 +02:00
spinlock_types.h
asm-generic: ticket-lock: New generic ticket-based spinlock
2022-05-11 11:49:38 -07:00
spinlock.h
asm-generic: ticket-lock: New generic ticket-based spinlock
2022-05-11 11:49:38 -07:00
statfs.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
string.h
asm-generic: add generic versions of common headers
2009-06-11 21:02:37 +02:00
switch_to.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36
2019-05-24 17:27:11 +02:00
syscall.h
ptrace: Create ptrace_report_syscall_{entry,exit} in ptrace.h
2022-03-10 13:35:08 -06:00
syscalls.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
termios-base.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
termios.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
timex.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
tlb.h
mmu_gather: fix the CONFIG_MMU_GATHER_NO_RANGE case
2022-07-22 09:28:34 -07:00
tlbflush.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
topology.h
mm: replace CONFIG_NEED_MULTIPLE_NODES with CONFIG_NUMA
2021-06-29 10:53:55 -07:00
trace_clock.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
uaccess.h
uaccess: remove CONFIG_SET_FS
2022-02-25 09:36:06 +01:00
unaligned.h
asm-generic: fix __get_unaligned_be48() on 32 bit platforms
2022-04-12 16:31:38 -06:00
user.h
asm-generic/user.h: Fix spelling in comment
2011-03-01 15:49:39 +01:00
vermagic.h
arch: split MODULE_ARCH_VERMAGIC definitions out to <asm/vermagic.h>
2020-04-23 10:50:26 +09:00
vga.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
vmlinux.lds.h
sched: Reverse sched_class layout
2022-05-19 23:46:13 +02:00
vtime.h
include/asm-generic/vtime.h: avoid zero-length file
2013-09-30 14:31:02 -07:00
word-at-a-time.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
xor.h
lib/xor: make xor prototypes more friendly to compiler vectorization
2022-02-11 20:39:39 +11:00