linux-kernel - [RFC PATCH 2/2] ARM: tlb: Use range in tlb_start_vma() and tlb_end

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Date:	Mon,  9 Mar 2009 14:59:57 +0200
From:	Aaro Koskinen <Aaro.Koskinen@...ia.com>
To:	linux-mm@...ck.org
Cc:	linux-kernel@...r.kernel.org
Subject: [RFC PATCH 2/2] ARM: tlb: Use range in tlb_start_vma() and tlb_end_vma()

Flush only the pages that were unmapped.

Signed-off-by: Aaro Koskinen <Aaro.Koskinen@...ia.com>
---
 arch/arm/include/asm/tlb.h |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm/include/asm/tlb.h b/arch/arm/include/asm/tlb.h
index d10c9c3..a034b6d 100644
--- a/arch/arm/include/asm/tlb.h
+++ b/arch/arm/include/asm/tlb.h
@@ -68,14 +68,14 @@ tlb_finish_mmu(struct mmu_gather *tlb, unsigned long start, unsigned long end)
 /*
  * In the case of tlb vma handling, we can optimise these away in the
  * case where we're doing a full MM flush.  When we're doing a munmap,
- * the vmas are adjusted to only cover the region to be torn down.
+ * the range is adjusted to only cover the region to be torn down.
  */
 static inline void
 tlb_start_vma(struct mmu_gather *tlb, struct vm_area_struct *vma,
 	      unsigned long range_start, unsigned long range_end)
 {
 	if (!tlb->fullmm)
-		flush_cache_range(vma, vma->vm_start, vma->vm_end);
+		flush_cache_range(vma, range_start, range_end);
 }
 
 static inline void
@@ -83,7 +83,7 @@ tlb_end_vma(struct mmu_gather *tlb, struct vm_area_struct *vma,
 	    unsigned long range_start, unsigned long range_end)
 {
 	if (!tlb->fullmm)
-		flush_tlb_range(vma, vma->vm_start, vma->vm_end);
+		flush_tlb_range(vma, range_start, range_end);
 }
 
 #define tlb_remove_page(tlb,page)	free_page_and_swap_cache(page)
-- 
1.5.4.3

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