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futex_wake(): disable IRQs while iterating plist

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Change-Id: I796794b2159816183c6487ef0048f42f97aac73b
This commit is contained in:
Balazs Gerofi
2020-03-17 11:37:45 +09:00
committed by Masamichi Takagi
parent ab11b168f0
commit a37f72da0e
1 changed files with 3 additions and 2 deletions
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5
kernel/futex.c
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@@ -311,6 +311,7 @@ static int futex_wake(uint32_t *uaddr, int fshared, int nr_wake, uint32_t bitset
struct plist_head *head;
union futex_key key = FUTEX_KEY_INIT;
int ret;
unsigned long irqstate;
if (!bitset)
return -EINVAL;
@@ -320,7 +321,7 @@ static int futex_wake(uint32_t *uaddr, int fshared, int nr_wake, uint32_t bitset
goto out;
hb = hash_futex(&key);
ihk_mc_spinlock_lock_noirq(&hb->lock);
irqstate = ihk_mc_spinlock_lock(&hb->lock);
head = &hb->chain;
plist_for_each_entry_safe(this, next, head, list) {
@@ -337,7 +338,7 @@ static int futex_wake(uint32_t *uaddr, int fshared, int nr_wake, uint32_t bitset
}
}
ihk_mc_spinlock_unlock_noirq(&hb->lock);
ihk_mc_spinlock_unlock(&hb->lock, irqstate);
put_futex_key(fshared, &key);
out:
return ret;