From: Geert Uytterhoeven <geert@linux-m68k.org>
Date: Tue, 14 Sep 2010 19:34:58 +0000 (+0200)
Subject: m68k: Remove big kernel lock in cache flush code
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=2f81a18446c3061b74f4770eb95adeba2a864b0f;p=sagit-ice-cold%2Fkernel_xiaomi_msm8998.git

m68k: Remove big kernel lock in cache flush code

The cache flush code doesn't need a lock, so we can remove the use of the BKL.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reported-by: Arnd Bergmann <arnd@arndb.de>
Suggested-by: Andreas Schwab <schwab@linux-m68k.org>
---

diff --git a/arch/m68k/kernel/sys_m68k.c b/arch/m68k/kernel/sys_m68k.c
index 2f431ece7b5f..3db2e7f902aa 100644
--- a/arch/m68k/kernel/sys_m68k.c
+++ b/arch/m68k/kernel/sys_m68k.c
@@ -12,7 +12,6 @@
 #include <linux/mm.h>
 #include <linux/fs.h>
 #include <linux/smp.h>
-#include <linux/smp_lock.h>
 #include <linux/sem.h>
 #include <linux/msg.h>
 #include <linux/shm.h>
@@ -377,7 +376,6 @@ sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len)
 	struct vm_area_struct *vma;
 	int ret = -EINVAL;
 
-	lock_kernel();
 	if (scope < FLUSH_SCOPE_LINE || scope > FLUSH_SCOPE_ALL ||
 	    cache & ~FLUSH_CACHE_BOTH)
 		goto out;
@@ -446,7 +444,6 @@ sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len)
 	    }
 	}
 out:
-	unlock_kernel();
 	return ret;
 }