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From cf78dde27b1d46ea38507f6e750892433b3b9508 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Tue, 21 Jul 2009 23:06:05 +0200
Subject: [PATCH] core: Do not disable interrupts on RT in kernel/users.c
commit 3d6ac61dfab979f3d8bec531772773b9dfaf0800 in tip.
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>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
---
kernel/user.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/user.c b/kernel/user.c
index 766467b..f3d2011 100644
--- a/kernel/user.c
+++ b/kernel/user.c
@@ -125,11 +125,11 @@ 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(struct user_namespace *ns, uid_t uid)
--
1.7.0.4
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