mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 08:58:07 +00:00
0ff0edb550
- rtmutex cleanup & spring cleaning pass that removes ~400 lines of code
- Futex simplifications & cleanups
- Add debugging to the CSD code, to help track down a tenacious race (or hw problem)
- Add lockdep_assert_not_held(), to allow code to require a lock to not be held,
and propagate this into the ath10k driver
- Misc LKMM documentation updates
- Misc KCSAN updates: cleanups & documentation updates
- Misc fixes and cleanups
- Fix locktorture bugs with ww_mutexes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
-----BEGIN PGP SIGNATURE-----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=cOOk
-----END PGP SIGNATURE-----
Merge tag 'locking-core-2021-04-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking updates from Ingo Molnar:
- rtmutex cleanup & spring cleaning pass that removes ~400 lines of
code
- Futex simplifications & cleanups
- Add debugging to the CSD code, to help track down a tenacious race
(or hw problem)
- Add lockdep_assert_not_held(), to allow code to require a lock to not
be held, and propagate this into the ath10k driver
- Misc LKMM documentation updates
- Misc KCSAN updates: cleanups & documentation updates
- Misc fixes and cleanups
- Fix locktorture bugs with ww_mutexes
* tag 'locking-core-2021-04-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (44 commits)
kcsan: Fix printk format string
static_call: Relax static_call_update() function argument type
static_call: Fix unused variable warn w/o MODULE
locking/rtmutex: Clean up signal handling in __rt_mutex_slowlock()
locking/rtmutex: Restrict the trylock WARN_ON() to debug
locking/rtmutex: Fix misleading comment in rt_mutex_postunlock()
locking/rtmutex: Consolidate the fast/slowpath invocation
locking/rtmutex: Make text section and inlining consistent
locking/rtmutex: Move debug functions as inlines into common header
locking/rtmutex: Decrapify __rt_mutex_init()
locking/rtmutex: Remove pointless CONFIG_RT_MUTEXES=n stubs
locking/rtmutex: Inline chainwalk depth check
locking/rtmutex: Move rt_mutex_debug_task_free() to rtmutex.c
locking/rtmutex: Remove empty and unused debug stubs
locking/rtmutex: Consolidate rt_mutex_init()
locking/rtmutex: Remove output from deadlock detector
locking/rtmutex: Remove rtmutex deadlock tester leftovers
locking/rtmutex: Remove rt_mutex_timed_lock()
MAINTAINERS: Add myself as futex reviewer
locking/mutex: Remove repeated declaration
...
88 lines
1.8 KiB
C
88 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_X86_JUMP_LABEL_H
|
|
#define _ASM_X86_JUMP_LABEL_H
|
|
|
|
#define HAVE_JUMP_LABEL_BATCH
|
|
|
|
#define JUMP_LABEL_NOP_SIZE 5
|
|
|
|
#include <asm/asm.h>
|
|
#include <asm/nops.h>
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <linux/stringify.h>
|
|
#include <linux/types.h>
|
|
|
|
static __always_inline bool arch_static_branch(struct static_key * const key, const bool branch)
|
|
{
|
|
asm_volatile_goto("1:"
|
|
".byte " __stringify(BYTES_NOP5) "\n\t"
|
|
".pushsection __jump_table, \"aw\" \n\t"
|
|
_ASM_ALIGN "\n\t"
|
|
".long 1b - ., %l[l_yes] - . \n\t"
|
|
_ASM_PTR "%c0 + %c1 - .\n\t"
|
|
".popsection \n\t"
|
|
: : "i" (key), "i" (branch) : : l_yes);
|
|
|
|
return false;
|
|
l_yes:
|
|
return true;
|
|
}
|
|
|
|
static __always_inline bool arch_static_branch_jump(struct static_key * const key, const bool branch)
|
|
{
|
|
asm_volatile_goto("1:"
|
|
".byte 0xe9\n\t .long %l[l_yes] - 2f\n\t"
|
|
"2:\n\t"
|
|
".pushsection __jump_table, \"aw\" \n\t"
|
|
_ASM_ALIGN "\n\t"
|
|
".long 1b - ., %l[l_yes] - . \n\t"
|
|
_ASM_PTR "%c0 + %c1 - .\n\t"
|
|
".popsection \n\t"
|
|
: : "i" (key), "i" (branch) : : l_yes);
|
|
|
|
return false;
|
|
l_yes:
|
|
return true;
|
|
}
|
|
|
|
#else /* __ASSEMBLY__ */
|
|
|
|
.macro STATIC_JUMP_IF_TRUE target, key, def
|
|
.Lstatic_jump_\@:
|
|
.if \def
|
|
/* Equivalent to "jmp.d32 \target" */
|
|
.byte 0xe9
|
|
.long \target - .Lstatic_jump_after_\@
|
|
.Lstatic_jump_after_\@:
|
|
.else
|
|
.byte BYTES_NOP5
|
|
.endif
|
|
.pushsection __jump_table, "aw"
|
|
_ASM_ALIGN
|
|
.long .Lstatic_jump_\@ - ., \target - .
|
|
_ASM_PTR \key - .
|
|
.popsection
|
|
.endm
|
|
|
|
.macro STATIC_JUMP_IF_FALSE target, key, def
|
|
.Lstatic_jump_\@:
|
|
.if \def
|
|
.byte BYTES_NOP5
|
|
.else
|
|
/* Equivalent to "jmp.d32 \target" */
|
|
.byte 0xe9
|
|
.long \target - .Lstatic_jump_after_\@
|
|
.Lstatic_jump_after_\@:
|
|
.endif
|
|
.pushsection __jump_table, "aw"
|
|
_ASM_ALIGN
|
|
.long .Lstatic_jump_\@ - ., \target - .
|
|
_ASM_PTR \key + 1 - .
|
|
.popsection
|
|
.endm
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif
|