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| author | Ingo Molnar <mingo@elte.hu> | 2006-07-03 00:24:34 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-03 15:27:02 -0700 |
| commit | e4d919188554a77c798a267e098059bc9aa39726 (patch) | |
| tree | bb5e47e09f5d107db44358ad668988f5ae768ade /include/linux/seqlock.h | |
| parent | 9cebb5526833059f327d237a032422c762378b2a (diff) | |
| download | linux-stable-e4d919188554a77c798a267e098059bc9aa39726.tar.gz linux-stable-e4d919188554a77c798a267e098059bc9aa39726.tar.bz2 linux-stable-e4d919188554a77c798a267e098059bc9aa39726.zip | |
[PATCH] lockdep: locking init debugging improvement
Locking init improvement:
- introduce and use __SPIN_LOCK_UNLOCKED for array initializations,
to pass in the name string of locks, used by debugging
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/seqlock.h')
| -rw-r--r-- | include/linux/seqlock.h | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/include/linux/seqlock.h b/include/linux/seqlock.h index 7bc5c7c12b54..46000936f8f1 100644 --- a/include/linux/seqlock.h +++ b/include/linux/seqlock.h @@ -38,9 +38,17 @@ typedef struct { * These macros triggered gcc-3.x compile-time problems. We think these are * OK now. Be cautious. */ -#define SEQLOCK_UNLOCKED { 0, SPIN_LOCK_UNLOCKED } -#define seqlock_init(x) do { *(x) = (seqlock_t) SEQLOCK_UNLOCKED; } while (0) +#define __SEQLOCK_UNLOCKED(lockname) \ + { 0, __SPIN_LOCK_UNLOCKED(lockname) } +#define SEQLOCK_UNLOCKED \ + __SEQLOCK_UNLOCKED(old_style_seqlock_init) + +#define seqlock_init(x) \ + do { *(x) = (seqlock_t) __SEQLOCK_UNLOCKED(x); } while (0) + +#define DEFINE_SEQLOCK(x) \ + seqlock_t x = __SEQLOCK_UNLOCKED(x) /* Lock out other writers and update the count. * Acts like a normal spin_lock/unlock. |