md: add __acquires/__releases annotations to (un)lock_two_stripes

This tells sparse that we acquire/release the two stripe locks and
avoids a warning.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Song Liu <songliubraving@fb.com>

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 364dd2f..d794d87 100644 (file)
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -711,6 +711,8 @@ static bool is_full_stripe_write(struct stripe_head *sh)
 }
 
 static void lock_two_stripes(struct stripe_head *sh1, struct stripe_head *sh2)
+               __acquires(&sh1->stripe_lock)
+               __acquires(&sh2->stripe_lock)
 {
        if (sh1 > sh2) {
                spin_lock_irq(&sh2->stripe_lock);
@@ -722,6 +724,8 @@ static void lock_two_stripes(struct stripe_head *sh1, struct stripe_head *sh2)
 }
 
 static void unlock_two_stripes(struct stripe_head *sh1, struct stripe_head *sh2)
+               __releases(&sh1->stripe_lock)
+               __releases(&sh2->stripe_lock)
 {
        spin_unlock(&sh1->stripe_lock);
        spin_unlock_irq(&sh2->stripe_lock);