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>
diff --git a/drivers/oprofile/oprofilefs.c b/drivers/oprofile/oprofilefs.c
index e9ff6f7..d0de6cc 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 @@
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;
}