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author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-11-26 16:02:40 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-11-26 16:02:40 -0800 |
commit | 168829ad09ca9cdfdc664b2110d0e3569932c12d (patch) | |
tree | 1b6351ab5766a272dec1fc08f77272a199bba978 /include/linux/seqlock.h | |
parent | Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip (diff) | |
parent | lkdtm: Remove references to CONFIG_REFCOUNT_FULL (diff) | |
download | linux-dev-168829ad09ca9cdfdc664b2110d0e3569932c12d.tar.xz linux-dev-168829ad09ca9cdfdc664b2110d0e3569932c12d.zip |
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking updates from Ingo Molnar:
"The main changes in this cycle were:
- A comprehensive rewrite of the robust/PI futex code's exit handling
to fix various exit races. (Thomas Gleixner et al)
- Rework the generic REFCOUNT_FULL implementation using
atomic_fetch_* operations so that the performance impact of the
cmpxchg() loops is mitigated for common refcount operations.
With these performance improvements the generic implementation of
refcount_t should be good enough for everybody - and this got
confirmed by performance testing, so remove ARCH_HAS_REFCOUNT and
REFCOUNT_FULL entirely, leaving the generic implementation enabled
unconditionally. (Will Deacon)
- Other misc changes, fixes, cleanups"
* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (27 commits)
lkdtm: Remove references to CONFIG_REFCOUNT_FULL
locking/refcount: Remove unused 'refcount_error_report()' function
locking/refcount: Consolidate implementations of refcount_t
locking/refcount: Consolidate REFCOUNT_{MAX,SATURATED} definitions
locking/refcount: Move saturation warnings out of line
locking/refcount: Improve performance of generic REFCOUNT_FULL code
locking/refcount: Move the bulk of the REFCOUNT_FULL implementation into the <linux/refcount.h> header
locking/refcount: Remove unused refcount_*_checked() variants
locking/refcount: Ensure integer operands are treated as signed
locking/refcount: Define constants for saturation and max refcount values
futex: Prevent exit livelock
futex: Provide distinct return value when owner is exiting
futex: Add mutex around futex exit
futex: Provide state handling for exec() as well
futex: Sanitize exit state handling
futex: Mark the begin of futex exit explicitly
futex: Set task::futex_state to DEAD right after handling futex exit
futex: Split futex_mm_release() for exit/exec
exit/exec: Seperate mm_release()
futex: Replace PF_EXITPIDONE with a state
...
Diffstat (limited to 'include/linux/seqlock.h')
-rw-r--r-- | include/linux/seqlock.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/seqlock.h b/include/linux/seqlock.h index bcf4cf26b8c8..0491d963d47e 100644 --- a/include/linux/seqlock.h +++ b/include/linux/seqlock.h @@ -79,7 +79,7 @@ static inline void seqcount_lockdep_reader_access(const seqcount_t *s) local_irq_save(flags); seqcount_acquire_read(&l->dep_map, 0, 0, _RET_IP_); - seqcount_release(&l->dep_map, 1, _RET_IP_); + seqcount_release(&l->dep_map, _RET_IP_); local_irq_restore(flags); } @@ -384,7 +384,7 @@ static inline void write_seqcount_begin(seqcount_t *s) static inline void write_seqcount_end(seqcount_t *s) { - seqcount_release(&s->dep_map, 1, _RET_IP_); + seqcount_release(&s->dep_map, _RET_IP_); raw_write_seqcount_end(s); } |