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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2013-08-12 12:01:28 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-08-12 12:01:28 -0700 |
| commit | 278225588d9989437e02b1020661f440b4df1709 (patch) | |
| tree | 7d3a91d05f90cb895c93ab9068d3cbf99326d88d | |
| parent | Linux 3.11-rc5 (diff) | |
| parent | mutex: Fix w/w mutex deadlock injection (diff) | |
| download | linux-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
| -rw-r--r-- | kernel/mutex.c | 4 |
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; |