From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Tue, 7 Jun 2011 09:17:30 +0000 (+0200)
Subject: printk, lockdep: Remove superfluous preempt_disable()
X-Git-Tag: accepted/tizen/common/20141203.182822~5609^2~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=47ff5c95db598184122aa634fa3452c0eecea877;p=platform%2Fkernel%2Flinux-arm64.git

printk, lockdep: Remove superfluous preempt_disable()

The raw_lock_irq_{save,restore}() already implies a
non-preemptibility.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/kernel/printk.c b/kernel/printk.c
index 6d08794..ba5ee04 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -841,7 +841,6 @@ asmlinkage int vprintk(const char *fmt, va_list args)
 	boot_delay_msec();
 	printk_delay();
 
-	preempt_disable();
 	/* This stops the holder of console_sem just where we want him */
 	raw_local_irq_save(flags);
 	this_cpu = smp_processor_id();
@@ -965,7 +964,6 @@ asmlinkage int vprintk(const char *fmt, va_list args)
 out_restore_irqs:
 	raw_local_irq_restore(flags);
 
-	preempt_enable();
 	return printed_len;
 }
 EXPORT_SYMBOL(printk);