| From: Thomas Gleixner <tglx@linutronix.de> |
| Date: Tue, 21 Jul 2009 23:06:05 +0200 |
| Subject: core: Do not disable interrupts on RT in kernel/users.c |
| |
| Use the local_irq_*_nort variants to reduce latencies in RT. The code |
| is serialized by the locks. No need to disable interrupts. |
| |
| Signed-off-by: Thomas Gleixner <tglx@linutronix.de> |
| |
| --- |
| kernel/user.c | 4 ++-- |
| 1 file changed, 2 insertions(+), 2 deletions(-) |
| |
| Index: linux-stable/kernel/user.c |
| =================================================================== |
| --- linux-stable.orig/kernel/user.c |
| +++ linux-stable/kernel/user.c |
| @@ -147,11 +147,11 @@ void free_uid(struct user_struct *up) |
| if (!up) |
| return; |
| |
| - local_irq_save(flags); |
| + local_irq_save_nort(flags); |
| if (atomic_dec_and_lock(&up->__count, &uidhash_lock)) |
| free_user(up, flags); |
| else |
| - local_irq_restore(flags); |
| + local_irq_restore_nort(flags); |
| } |
| |
| struct user_struct *alloc_uid(kuid_t uid) |
