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| author | Manfred Spraul <manfred@colorfullife.com> | 2017-07-12 14:34:44 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-12 16:26:01 -0700 |
| commit | 2cd648c110b5570c3280bd645797658cabbe5f5c (patch) | |
| tree | 6e2cec72bf778d0fb2145b12b72871968dcb93d8 /include/linux/sem.h | |
| parent | dba4cdd39e698d8dcdad0656825423052ac90ccd (diff) | |
| download | linux-2cd648c110b5570c3280bd645797658cabbe5f5c.tar.gz linux-2cd648c110b5570c3280bd645797658cabbe5f5c.tar.bz2 linux-2cd648c110b5570c3280bd645797658cabbe5f5c.zip | |
include/linux/sem.h: correctly document sem_ctime
sem_ctime is initialized to the semget() time and then updated at every
semctl() that changes the array.
Thus it does not represent the time of the last change.
Especially, semop() calls are only stored in sem_otime, not in
sem_ctime.
This is already described in ipc/sem.c, I just overlooked that there is
a comment in include/linux/sem.h and man semctl(2) as well.
So: Correct wrong comments.
Link: http://lkml.kernel.org/r/20170515171912.6298-4-manfred@colorfullife.com
Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: <1vier1@web.de>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/sem.h')
| -rw-r--r-- | include/linux/sem.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/sem.h b/include/linux/sem.h index 9db14093b73c..be5cf2ea14ad 100644 --- a/include/linux/sem.h +++ b/include/linux/sem.h @@ -30,7 +30,7 @@ struct sem { /* One sem_array data structure for each set of semaphores in the system. */ struct sem_array { struct kern_ipc_perm sem_perm; /* permissions .. see ipc.h */ - time_t sem_ctime; /* last change time */ + time_t sem_ctime; /* create/last semctl() time */ struct list_head pending_alter; /* pending operations */ /* that alter the array */ struct list_head pending_const; /* pending complex operations */ |