From 59cc185ada89245204c658ebcf64422968736672 Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Sun, 25 Jun 2006 05:47:33 -0700 Subject: [PATCH] oprofile: convert from semaphores to mutexes Signed-off-by: Markus Armbruster Cc: Philippe Elie Cc: John Levon Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/oprofile/event_buffer.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'drivers/oprofile/event_buffer.c') diff --git a/drivers/oprofile/event_buffer.c b/drivers/oprofile/event_buffer.c index b80318f0342..04d641714d3 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; } -- cgit v1.2.3