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| author | Markus Armbruster <armbru@redhat.com> | 2006-06-25 05:47:33 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-25 10:01:04 -0700 |
| commit | 59cc185ada89245204c658ebcf64422968736672 (patch) | |
| tree | 042e46cfe90c2ad5b711e2791b05f73ab1fe7725 /drivers/oprofile/event_buffer.c | |
| parent | a2926b1449bcc3d348e2228114b04869dc2f3986 (diff) | |
| download | linux-59cc185ada89245204c658ebcf64422968736672.tar.gz linux-59cc185ada89245204c658ebcf64422968736672.tar.bz2 linux-59cc185ada89245204c658ebcf64422968736672.zip | |
[PATCH] oprofile: convert from semaphores to mutexes
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Cc: Philippe Elie <phil.el@wanadoo.fr>
Cc: John Levon <levon@movementarian.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/oprofile/event_buffer.c')
| -rw-r--r-- | drivers/oprofile/event_buffer.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/oprofile/event_buffer.c b/drivers/oprofile/event_buffer.c index b80318f03420..04d641714d34 100644 --- a/drivers/oprofile/event_buffer.c +++ b/drivers/oprofile/event_buffer.c @@ -24,7 +24,7 @@ #include "event_buffer.h" #include "oprofile_stats.h" -DECLARE_MUTEX(buffer_sem); +DEFINE_MUTEX(buffer_mutex); static unsigned long buffer_opened; static DECLARE_WAIT_QUEUE_HEAD(buffer_wait); @@ -32,7 +32,7 @@ static unsigned long * event_buffer; static unsigned long buffer_size; static unsigned long buffer_watershed; static size_t buffer_pos; -/* atomic_t because wait_event checks it outside of buffer_sem */ +/* atomic_t because wait_event checks it outside of buffer_mutex */ static atomic_t buffer_ready = ATOMIC_INIT(0); /* Add an entry to the event buffer. When we @@ -60,10 +60,10 @@ void add_event_entry(unsigned long value) */ void wake_up_buffer_waiter(void) { - down(&buffer_sem); + mutex_lock(&buffer_mutex); atomic_set(&buffer_ready, 1); wake_up(&buffer_wait); - up(&buffer_sem); + mutex_unlock(&buffer_mutex); } @@ -162,7 +162,7 @@ static ssize_t event_buffer_read(struct file * file, char __user * buf, if (!atomic_read(&buffer_ready)) return -EAGAIN; - down(&buffer_sem); + mutex_lock(&buffer_mutex); atomic_set(&buffer_ready, 0); @@ -177,7 +177,7 @@ static ssize_t event_buffer_read(struct file * file, char __user * buf, buffer_pos = 0; out: - up(&buffer_sem); + mutex_unlock(&buffer_mutex); return retval; } |