From: Daniel Walker <dwalker@mvista.com>
To: mingo@elte.hu
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH -rt] revert bh_lru_lock() to preempt_disable()
Date: Sat, 22 Apr 2006 08:05:48 -0700 [thread overview]
Message-ID: <200604221505.k3MF5mql022083@dwalker1.mvista.com> (raw)
The bh_lru_lock() was set to disable interrupt to protect
from IPI's, which are only on SMP . So I don't think it's needed
in UP PREEMPT_RT configs.
Signed-Off-By: Daniel Walker <dwalker@mvista.com>
Index: linux-2.6.16/fs/buffer.c
===================================================================
--- linux-2.6.16.orig/fs/buffer.c
+++ linux-2.6.16/fs/buffer.c
@@ -1326,7 +1326,7 @@ struct bh_lru {
static DEFINE_PER_CPU(struct bh_lru, bh_lrus) = {{ NULL }};
-#if defined(CONFIG_SMP) || defined(CONFIG_PREEMPT_RT)
+#if defined(CONFIG_SMP)
#define bh_lru_lock() local_irq_disable()
#define bh_lru_unlock() local_irq_enable()
#else
next reply other threads:[~2006-04-22 18:33 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-22 15:05 Daniel Walker [this message]
2006-05-03 20:47 ` Ingo Molnar
2006-05-03 20:47 ` Daniel Walker
2006-05-03 21:01 ` Ingo Molnar
2006-05-03 21:01 ` Daniel Walker
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