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authorLinus Torvalds <torvalds@linux-foundation.org>2013-08-12 12:01:28 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-08-12 12:01:28 -0700
commit278225588d9989437e02b1020661f440b4df1709 (patch)
tree7d3a91d05f90cb895c93ab9068d3cbf99326d88d /kernel
parentLinux 3.11-rc5 (diff)
parentmutex: Fix w/w mutex deadlock injection (diff)
downloadlinux-dev-278225588d9989437e02b1020661f440b4df1709.tar.xz
linux-dev-278225588d9989437e02b1020661f440b4df1709.zip
Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull w/w mutex deadlock injection fix from Ingo Molnar. This bug made the CONFIG_DEBUG_WW_MUTEX_SLOWPATH=y option largely useless, but wouldn't affect normal users. * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: mutex: Fix w/w mutex deadlock injection
Diffstat (limited to 'kernel')
-rw-r--r--kernel/mutex.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/mutex.c b/kernel/mutex.c
index ff05f4bd86eb..a52ee7bb830d 100644
--- a/kernel/mutex.c
+++ b/kernel/mutex.c
@@ -686,7 +686,7 @@ __ww_mutex_lock(struct ww_mutex *lock, struct ww_acquire_ctx *ctx)
might_sleep();
ret = __mutex_lock_common(&lock->base, TASK_UNINTERRUPTIBLE,
0, &ctx->dep_map, _RET_IP_, ctx);
- if (!ret && ctx->acquired > 0)
+ if (!ret && ctx->acquired > 1)
return ww_mutex_deadlock_injection(lock, ctx);
return ret;
@@ -702,7 +702,7 @@ __ww_mutex_lock_interruptible(struct ww_mutex *lock, struct ww_acquire_ctx *ctx)
ret = __mutex_lock_common(&lock->base, TASK_INTERRUPTIBLE,
0, &ctx->dep_map, _RET_IP_, ctx);
- if (!ret && ctx->acquired > 0)
+ if (!ret && ctx->acquired > 1)
return ww_mutex_deadlock_injection(lock, ctx);
return ret;