diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2009-07-25 16:18:34 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-09-13 11:12:05 +0200 |
| commit | 2d21a29fb62f142b8a62496700d8d82a6a8fd783 (patch) | |
| tree | 78d83ed47a72b1e31ecadb3f77e91f865b407b48 /drivers/oprofile/oprofilefs.c | |
| parent | 6b2c1800f1d3a608af952cfbd57f8f1a71c5d9b4 (diff) | |
| download | blackbird-op-linux-2d21a29fb62f142b8a62496700d8d82a6a8fd783.tar.gz blackbird-op-linux-2d21a29fb62f142b8a62496700d8d82a6a8fd783.zip | |
locking, oprofile: Annotate oprofilefs lock as raw
The oprofilefs_lock can be taken in atomic context (in profiling
interrupts) and therefore cannot cannot be preempted on -rt -
annotate it.
In mainline this change documents the low level nature of
the lock - otherwise there's no functional difference. Lockdep
and Sparse checking will work as usual.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/oprofile/oprofilefs.c')
| -rw-r--r-- | drivers/oprofile/oprofilefs.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/oprofile/oprofilefs.c b/drivers/oprofile/oprofilefs.c index e9ff6f7770be..d0de6cc2d7a5 100644 --- a/drivers/oprofile/oprofilefs.c +++ b/drivers/oprofile/oprofilefs.c @@ -21,7 +21,7 @@ #define OPROFILEFS_MAGIC 0x6f70726f -DEFINE_SPINLOCK(oprofilefs_lock); +DEFINE_RAW_SPINLOCK(oprofilefs_lock); static struct inode *oprofilefs_get_inode(struct super_block *sb, int mode) { @@ -76,9 +76,9 @@ int oprofilefs_ulong_from_user(unsigned long *val, char const __user *buf, size_ if (copy_from_user(tmpbuf, buf, count)) return -EFAULT; - spin_lock_irqsave(&oprofilefs_lock, flags); + raw_spin_lock_irqsave(&oprofilefs_lock, flags); *val = simple_strtoul(tmpbuf, NULL, 0); - spin_unlock_irqrestore(&oprofilefs_lock, flags); + raw_spin_unlock_irqrestore(&oprofilefs_lock, flags); return 0; } |
