diff options
author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2008-04-19 17:17:34 +0100 |
---|---|---|
committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-04-19 17:17:34 +0100 |
commit | cf816ecb533ab96b883dfdc0db174598b5b5c4d2 (patch) | |
tree | 1b7705db288ae2917105e624b01fdf81e0882bf1 /kernel/printk.c | |
parent | Merge branch 'omap2-upstream' into devel (diff) | |
parent | [ARM] Remove leds-tosa.c (diff) | |
download | linux-dev-cf816ecb533ab96b883dfdc0db174598b5b5c4d2.tar.xz linux-dev-cf816ecb533ab96b883dfdc0db174598b5b5c4d2.zip |
Merge branch 'merge-fixes' into devel
Diffstat (limited to 'kernel/printk.c')
-rw-r--r-- | kernel/printk.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/kernel/printk.c b/kernel/printk.c index c46a20a19a15..bdd4ea8c3f2b 100644 --- a/kernel/printk.c +++ b/kernel/printk.c @@ -643,8 +643,21 @@ static int acquire_console_semaphore_for_printk(unsigned int cpu) { int retval = 0; - if (can_use_console(cpu)) - retval = !try_acquire_console_sem(); + if (!try_acquire_console_sem()) { + retval = 1; + + /* + * If we can't use the console, we need to release + * the console semaphore by hand to avoid flushing + * the buffer. We need to hold the console semaphore + * in order to do this test safely. + */ + if (!can_use_console(cpu)) { + console_locked = 0; + up(&console_sem); + retval = 0; + } + } printk_cpu = UINT_MAX; spin_unlock(&logbuf_lock); return retval; |