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Subject[Patch RFC 34/37] 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 and investigation.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
kernel/printk.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
Index: linux-2.6-tip/kernel/printk.c
===================================================================
--- linux-2.6-tip.orig/kernel/printk.c
+++ linux-2.6-tip/kernel/printk.c
@@ -73,7 +73,7 @@ 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);

@@ -529,7 +529,7 @@ 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);
+ semaphore_init(&console_sem);
}

#if defined(CONFIG_PRINTK_TIME)



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