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locking, oprofile: Annotate oprofilefs lock as raw

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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 <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Thomas Gleixner 2009-07-25 16:18:34 +02:00 • committed by Ingo Molnar
commit 2d21a29fb6
5 changed files with 10 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

4
drivers/oprofile/event_buffer.c
View file

@ -82,10 +82,10 @@ int alloc_event_buffer(void)
{
unsigned long flags;
spin_lock_irqsave(&oprofilefs_lock, flags);
raw_spin_lock_irqsave(&oprofilefs_lock, flags);
buffer_size = oprofile_buffer_size;
buffer_watershed = oprofile_buffer_watershed;
spin_unlock_irqrestore(&oprofilefs_lock, flags);
raw_spin_unlock_irqrestore(&oprofilefs_lock, flags);
if (buffer_watershed >= buffer_size)
return -EINVAL;

4
drivers/oprofile/oprofile_perf.c
View file

@ -160,9 +160,9 @@ static int oprofile_perf_create_files(struct super_block *sb, struct dentry *roo
static int oprofile_perf_setup(void)
{
spin_lock(&oprofilefs_lock);
raw_spin_lock(&oprofilefs_lock);
op_perf_setup();
spin_unlock(&oprofilefs_lock);
raw_spin_unlock(&oprofilefs_lock);
return 0;
}

6
drivers/oprofile/oprofilefs.c
View file

@ -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;
}