Messages in this thread Patch in this message | | | From | Sebastian Andrzej Siewior <> | Subject | [PATCH 6/8] userns: Use irqsave variant of refcount_dec_and_lock() | Date | Wed, 9 May 2018 21:36:43 +0200 |
| |
From: Anna-Maria Gleixner <anna-maria@linutronix.de>
The irqsave variant of refcount_dec_and_lock handles irqsave/restore when taking/releasing the spin lock. With this variant the call of local_irq_save/restore is no longer required.
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de> [bigeasy: s@atomic_dec_and_lock@refcount_dec_and_lock@g ] Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> --- kernel/user.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/kernel/user.c b/kernel/user.c index 5f65ef195259..0df9b1640b2a 100644 --- a/kernel/user.c +++ b/kernel/user.c @@ -169,11 +169,8 @@ void free_uid(struct user_struct *up) if (!up) return; - local_irq_save(flags); - if (refcount_dec_and_lock(&up->__count, &uidhash_lock)) + if (refcount_dec_and_lock_irqsave(&up->__count, &uidhash_lock, &flags)) free_user(up, flags); - else - local_irq_restore(flags); } struct user_struct *alloc_uid(kuid_t uid) -- 2.17.0
| |