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author | Randy Dunlap <randy.dunlap@oracle.com> | 2010-09-02 15:48:16 -0700 |
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committer | Ingo Molnar <mingo@elte.hu> | 2010-09-03 08:19:51 +0200 |
commit | ef5dc121d5a0bb1fa477c5395277259f07d318a3 (patch) | |
tree | 5af1d24406aa014eed72f07097316ba6f7d0d04f /Documentation/mutex-design.txt | |
parent | 950eaaca681c44aab87a46225c9e44f902c080aa (diff) | |
download | kernel_samsung_crespo-ef5dc121d5a0bb1fa477c5395277259f07d318a3.zip kernel_samsung_crespo-ef5dc121d5a0bb1fa477c5395277259f07d318a3.tar.gz kernel_samsung_crespo-ef5dc121d5a0bb1fa477c5395277259f07d318a3.tar.bz2 |
mutex: Fix annotations to include it in kernel-locking docbook
Fix kernel-doc notation in linux/mutex.h and kernel/mutex.c,
then add these 2 files to the kernel-locking docbook as the
Mutex API reference chapter.
Add one API function to mutex-design.txt and correct a typo in
that file.
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
LKML-Reference: <20100902154816.6cc2f9ad.randy.dunlap@oracle.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'Documentation/mutex-design.txt')
-rw-r--r-- | Documentation/mutex-design.txt | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Documentation/mutex-design.txt b/Documentation/mutex-design.txt index c91ccc0..38c10fd 100644 --- a/Documentation/mutex-design.txt +++ b/Documentation/mutex-design.txt @@ -9,7 +9,7 @@ firstly, there's nothing wrong with semaphores. But if the simpler mutex semantics are sufficient for your code, then there are a couple of advantages of mutexes: - - 'struct mutex' is smaller on most architectures: .e.g on x86, + - 'struct mutex' is smaller on most architectures: E.g. on x86, 'struct semaphore' is 20 bytes, 'struct mutex' is 16 bytes. A smaller structure size means less RAM footprint, and better CPU-cache utilization. @@ -136,3 +136,4 @@ the APIs of 'struct mutex' have been streamlined: void mutex_lock_nested(struct mutex *lock, unsigned int subclass); int mutex_lock_interruptible_nested(struct mutex *lock, unsigned int subclass); + int atomic_dec_and_mutex_lock(atomic_t *cnt, struct mutex *lock); |