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authorIngo Molnar <mingo@elte.hu>2006-07-03 00:24:34 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-07-03 15:27:02 -0700
commite4d919188554a77c798a267e098059bc9aa39726 (patch)
treebb5e47e09f5d107db44358ad668988f5ae768ade /include/linux/seqlock.h
parent9cebb5526833059f327d237a032422c762378b2a (diff)
downloadlinux-e4d919188554a77c798a267e098059bc9aa39726.tar.gz
[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.h12
1 files changed, 10 insertions, 2 deletions
diff --git a/include/linux/seqlock.h b/include/linux/seqlock.h
index 7bc5c7c12b5..46000936f8f 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.