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| author | Thomas Gleixner <tglx@linutronix.de> | 2010-09-07 14:33:43 +0000 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2010-10-12 17:36:10 +0200 |
| commit | 5b8c4f23c54edda640a4850bc9b81dee70acb525 (patch) | |
| tree | a09362e849e00625e2a37520e3f81a5ace00dee4 | |
| parent | 8192b1f6b1a46b33213b993471356495a93ffc70 (diff) | |
| download | lwn-5b8c4f23c54edda640a4850bc9b81dee70acb525.tar.gz lwn-5b8c4f23c54edda640a4850bc9b81dee70acb525.zip | |
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: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Christoph Hellwig <hch@infradead.org>
LKML-Reference: <20100907125057.179587334@linutronix.de>
| -rw-r--r-- | kernel/printk.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/printk.c b/kernel/printk.c index 8fe465ac008a..2531017795f6 100644 --- a/kernel/printk.c +++ b/kernel/printk.c @@ -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) |