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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>
This commit is contained in:
Christoph Hellwig 2019-04-04 18:56:15 +02:00 committed by Song Liu
parent 2b598ee54a
commit 368ecade05
1 changed files with 4 additions and 0 deletions
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4
drivers/md/raid5.c
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@ -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);