linux-kernel - [PATCH] ARM: tlb: Compile out MULTI_TLB specific code when MULTI

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Message-Id: <1316190666-18905-1-git-send-email-tjlee@ambarella.com>
Date:	Sat, 17 Sep 2011 00:31:06 +0800
From:	Tzu-Jung Lee <roylee17@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	rmk+kernel@....linux.org.uk, Tzu-Jung Lee <tjlee@...arella.com>
Subject: [PATCH] ARM: tlb: Compile out MULTI_TLB specific code when MULTI_TLB is undefined

To eliminate the 'undefined cpu_tlb' errors when the kernel is built with -O0

Change-Id: Ie5afea022b30dbe23a7ee3f3fc6af0dd6479b980
Signed-off-by: Tzu-Jung Lee <tjlee@...arella.com>

diff --git a/arch/arm/include/asm/tlbflush.h b/arch/arm/include/asm/tlbflush.h
index d2005de..a3f7aea 100644
--- a/arch/arm/include/asm/tlbflush.h
+++ b/arch/arm/include/asm/tlbflush.h
@@ -230,23 +230,22 @@ struct cpu_tlb_fns {
  */
 #ifdef MULTI_TLB
 
+extern struct cpu_tlb_fns cpu_tlb;
 #define __cpu_flush_user_tlb_range	cpu_tlb.flush_user_range
 #define __cpu_flush_kern_tlb_range	cpu_tlb.flush_kern_range
+#define __cpu_tlb_flags			cpu_tlb.tlb_flags
 
 #else
 
 #define __cpu_flush_user_tlb_range	__glue(_TLB,_flush_user_tlb_range)
 #define __cpu_flush_kern_tlb_range	__glue(_TLB,_flush_kern_tlb_range)
+#define __cpu_tlb_flags			0
 
 extern void __cpu_flush_user_tlb_range(unsigned long, unsigned long, struct vm_area_struct *);
 extern void __cpu_flush_kern_tlb_range(unsigned long, unsigned long);
 
 #endif
 
-extern struct cpu_tlb_fns cpu_tlb;
-
-#define __cpu_tlb_flags			cpu_tlb.tlb_flags
-
 /*
  *	TLB Management
  *	==============
-- 
1.7.6.1

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