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author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-11-14 16:30:30 +0900 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-11-14 16:30:30 +0900 |
commit | 5e30025a319910695f5010dc0fb53a23299da14d (patch) | |
tree | 4292bcf78de221c7de1774ccf5ad0ac5a9315c26 /Documentation/mutex-design.txt | |
parent | 7971e23a66c94f1b9bd2d64a3e86dfbfa8c60121 (diff) | |
parent | 90d3839b90fe379557dae4a44735a6af78f42885 (diff) |
Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull core locking changes from Ingo Molnar:
"The biggest changes:
- add lockdep support for seqcount/seqlocks structures, this
unearthed both bugs and required extra annotation.
- move the various kernel locking primitives to the new
kernel/locking/ directory"
* 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits)
block: Use u64_stats_init() to initialize seqcounts
locking/lockdep: Mark __lockdep_count_forward_deps() as static
lockdep/proc: Fix lock-time avg computation
locking/doc: Update references to kernel/mutex.c
ipv6: Fix possible ipv6 seqlock deadlock
cpuset: Fix potential deadlock w/ set_mems_allowed
seqcount: Add lockdep functionality to seqcount/seqlock structures
net: Explicitly initialize u64_stats_sync structures for lockdep
locking: Move the percpu-rwsem code to kernel/locking/
locking: Move the lglocks code to kernel/locking/
locking: Move the rwsem code to kernel/locking/
locking: Move the rtmutex code to kernel/locking/
locking: Move the semaphore core to kernel/locking/
locking: Move the spinlock code to kernel/locking/
locking: Move the lockdep code to kernel/locking/
locking: Move the mutex code to kernel/locking/
hung_task debugging: Add tracepoint to report the hang
x86/locking/kconfig: Update paravirt spinlock Kconfig description
lockstat: Report avg wait and hold times
lockdep, x86/alternatives: Drop ancient lockdep fixup message
...
Diffstat (limited to 'Documentation/mutex-design.txt')
-rw-r--r-- | Documentation/mutex-design.txt | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/Documentation/mutex-design.txt b/Documentation/mutex-design.txt index 38c10fd7f411..1dfe62c3641d 100644 --- a/Documentation/mutex-design.txt +++ b/Documentation/mutex-design.txt @@ -116,11 +116,11 @@ using mutexes at the moment, please let me know if you find any. ] Implementation of mutexes ------------------------- -'struct mutex' is the new mutex type, defined in include/linux/mutex.h -and implemented in kernel/mutex.c. It is a counter-based mutex with a -spinlock and a wait-list. The counter has 3 states: 1 for "unlocked", -0 for "locked" and negative numbers (usually -1) for "locked, potential -waiters queued". +'struct mutex' is the new mutex type, defined in include/linux/mutex.h and +implemented in kernel/locking/mutex.c. It is a counter-based mutex with a +spinlock and a wait-list. The counter has 3 states: 1 for "unlocked", 0 for +"locked" and negative numbers (usually -1) for "locked, potential waiters +queued". the APIs of 'struct mutex' have been streamlined: |