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| author | Olof Johansson <olof@lixom.net> | 2012-11-29 22:39:11 -0800 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2012-11-29 22:39:11 -0800 |
| commit | 68fb31706d50dd5d337cd7928aeb780358b910a5 (patch) | |
| tree | 6632d05aae22e99d7f128104b536bfdfc225a696 /kernel | |
| parent | 9489e9dcae718d5fde988e4a684a0f55b5f94d17 (diff) | |
| parent | c8a1ceccf394b2f99feed2b702732140e9f0f92d (diff) | |
| download | cachepc-linux-68fb31706d50dd5d337cd7928aeb780358b910a5.tar.gz cachepc-linux-68fb31706d50dd5d337cd7928aeb780358b910a5.zip | |
Merge branch 'next/cleanup' into next/pm2
By Tony Lindgren (36) and others
via Tony Lindgren (22) and others
* next/cleanup: (303 commits)
ARM: Kirkwood: Use hw_pci.ops instead of hw_pci.scan
ARM: OMAP3: cm-t3517: use GPTIMER for system clock
ARM: OMAP2+: timer: remove CONFIG_OMAP_32K_TIMER
ARM: SAMSUNG: use devm_ functions for ADC driver
ARM: EXYNOS: no duplicate mask/unmask in eint0_15
ARM: S3C24XX: SPI clock channel setup is fixed for S3C2443
ARM: EXYNOS: Remove i2c0 resource information and setting of device names
ARM: Kirkwood: checkpatch cleanups
ARM: Kirkwood: Fix sparse warnings.
ARM: Kirkwood: Remove unused includes
ARM: kirkwood: cleanup lsxl board includes
ARM: integrator: use BUG_ON where possible
ARM: integrator: push down SC dependencies
ARM: integrator: delete static UART1 mapping
ARM: integrator: delete SC mapping on the CP
ARM: integrator: remove static CP syscon mapping
ARM: integrator: remove static AP syscon mapping
ARM: integrator: hook the CP into the SoC bus
ARM: integrator: hook the AP into the SoC bus
ARM: OMAP2+: Fix compiler warning for 32k timer
...
Diffstat (limited to 'kernel')
| -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 2d607f4d1797..22e070f3470a 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)) |