diff options
| author |   Steven Rostedt <rostedt@goodmis.org> | 2008-09-06 01:06:04 -0400 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2008-10-14 10:36:58 +0200 |
| commit | 644f991d4b920ab1f5043509651479420b293490 (patch) | |
| tree | 075c57f5fd43206d54e5debed0e738e1878d73aa /kernel/trace/ftrace.c | |
| parent | ftrace: use ftrace_release for all dynamic ftrace functions (diff) | |
| download | linux-dev-644f991d4b920ab1f5043509651479420b293490.tar.xz linux-dev-644f991d4b920ab1f5043509651479420b293490.zip | |
ftrace: fix unlocking of hash
This must be brown paper bag week for Steven Rostedt!
While working on ftrace for PPC, I discovered that the hash locking done
when CONFIG_FTRACE_MCOUNT_RECORD is not set, is totally incorrect.
With a cut and paste error, I had the hash lock macro to lock for both
hash_lock _and_ hash_unlock!
This bug did not affect x86 since this bug was introduced when
CONFIG_FTRACE_MCOUNT_RECORD was added to x86.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to '')
| -rw-r--r-- | kernel/trace/ftrace.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index b69966f0f144..c9e09d86e1d8 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -170,7 +170,8 @@ static int __unregister_ftrace_function(struct ftrace_ops *ops) */ static DEFINE_SPINLOCK(ftrace_hash_lock); #define ftrace_hash_lock(flags) spin_lock_irqsave(&ftrace_hash_lock, flags) -#define ftrace_hash_unlock(flags) spin_lock_irqsave(&ftrace_hash_lock, flags) +#define ftrace_hash_unlock(flags) \ + spin_unlock_irqrestore(&ftrace_hash_lock, flags) #else /* This is protected via the ftrace_lock with MCOUNT_RECORD. */ #define ftrace_hash_lock(flags) do { (void)(flags); } while (0) |