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| author | Ingo Molnar <mingo@elte.hu> | 2006-12-12 12:10:28 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-12 08:10:44 -0800 |
| commit | 99a3eb3845f034eb55640a3da73e5e28349678c6 (patch) | |
| tree | 9a6704ac9d8bb0ab2b3649cb05999daa0e96175c | |
| parent | d907dd2efd69195f4a5fc584a0eaecc599ca4c2c (diff) | |
| download | linux-stable-99a3eb3845f034eb55640a3da73e5e28349678c6.tar.gz linux-stable-99a3eb3845f034eb55640a3da73e5e28349678c6.tar.bz2 linux-stable-99a3eb3845f034eb55640a3da73e5e28349678c6.zip | |
[PATCH] lockdep: fix seqlock_init()
seqlock_init() needs to use spin_lock_init() for dynamic locks, so that
lockdep is notified about the presence of a new lock.
(this is a fallout of the recent networking merge, which started using
the so-far unused seqlock_init() API.)
This fix solves the following lockdep-internal warning on current -git:
INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
__lock_acquire+0x10c/0x9f9
lock_acquire+0x56/0x72
_spin_lock+0x35/0x42
neigh_destroy+0x9d/0x12e
neigh_periodic_timer+0x10a/0x15c
run_timer_softirq+0x126/0x18e
__do_softirq+0x6b/0xe6
do_softirq+0x64/0xd2
ksoftirqd+0x82/0x138
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | include/linux/seqlock.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/include/linux/seqlock.h b/include/linux/seqlock.h index 46000936f8f1..6b0648cfdffc 100644 --- a/include/linux/seqlock.h +++ b/include/linux/seqlock.h @@ -44,8 +44,11 @@ typedef struct { #define SEQLOCK_UNLOCKED \ __SEQLOCK_UNLOCKED(old_style_seqlock_init) -#define seqlock_init(x) \ - do { *(x) = (seqlock_t) __SEQLOCK_UNLOCKED(x); } while (0) +#define seqlock_init(x) \ + do { \ + (x)->sequence = 0; \ + spin_lock_init(&(x)->lock); \ + } while (0) #define DEFINE_SEQLOCK(x) \ seqlock_t x = __SEQLOCK_UNLOCKED(x) |