Commit 5b8c4f23 authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

printk: Make console_sem a semaphore not a pseudo mutex



It needs to be investigated whether it can be replaced by a real
mutex, but that needs more thought.
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Christoph Hellwig <hch@infradead.org>
LKML-Reference: <20100907125057.179587334@linutronix.de>
parent 8192b1f6
......@@ -85,7 +85,7 @@ EXPORT_SYMBOL(oops_in_progress);
* provides serialisation for access to the entire console
* driver system.
*/
static DECLARE_MUTEX(console_sem);
static DEFINE_SEMAPHORE(console_sem);
struct console *console_drivers;
EXPORT_SYMBOL_GPL(console_drivers);
......@@ -556,7 +556,7 @@ static void zap_locks(void)
/* If a crash is occurring, make sure we can't deadlock */
spin_lock_init(&logbuf_lock);
/* And make sure that we print immediately */
init_MUTEX(&console_sem);
sema_init(&console_sem, 1);
}
#if defined(CONFIG_PRINTK_TIME)
......
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