diff options
| author | Olof Johansson <olof@lixom.net> | 2012-12-12 16:09:22 -0800 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2012-12-12 16:10:00 -0800 |
| commit | 4a76411ea3f1da9032e031f8fff8894b97d141b2 (patch) | |
| tree | 59976175d70b6e08aacd4abf7090919d3b78fc29 /kernel/printk.c | |
| parent | 5c1af2a7011bf719807de360cb64c2f610269a38 (diff) | |
| parent | fb6842a7bc44bf719bfe85d5819a153d7c215510 (diff) | |
| download | olio-linux-3.10-4a76411ea3f1da9032e031f8fff8894b97d141b2.tar.xz olio-linux-3.10-4a76411ea3f1da9032e031f8fff8894b97d141b2.zip | |
ARM: arm-soc: Merge branch 'next/clk' into next/pm
Merge together a couple of the smaller pm/clock branches into one.
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'kernel/printk.c')
| -rw-r--r-- | kernel/printk.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/kernel/printk.c b/kernel/printk.c index 2d607f4d179..22e070f3470 100644 --- a/kernel/printk.c +++ b/kernel/printk.c @@ -87,6 +87,12 @@ static DEFINE_SEMAPHORE(console_sem); struct console *console_drivers; EXPORT_SYMBOL_GPL(console_drivers); +#ifdef CONFIG_LOCKDEP +static struct lockdep_map console_lock_dep_map = { + .name = "console_lock" +}; +#endif + /* * This is used for debugging the mess that is the VT code by * keeping track if we have the console semaphore held. It's @@ -1908,12 +1914,14 @@ static int __cpuinit console_cpu_notify(struct notifier_block *self, */ void console_lock(void) { - BUG_ON(in_interrupt()); + might_sleep(); + down(&console_sem); if (console_suspended) return; console_locked = 1; console_may_schedule = 1; + mutex_acquire(&console_lock_dep_map, 0, 0, _RET_IP_); } EXPORT_SYMBOL(console_lock); @@ -1935,6 +1943,7 @@ int console_trylock(void) } console_locked = 1; console_may_schedule = 0; + mutex_acquire(&console_lock_dep_map, 0, 1, _RET_IP_); return 1; } EXPORT_SYMBOL(console_trylock); @@ -2095,6 +2104,7 @@ skip: local_irq_restore(flags); } console_locked = 0; + mutex_release(&console_lock_dep_map, 1, _RET_IP_); /* Release the exclusive_console once it is used */ if (unlikely(exclusive_console)) |