linux-kernel - [PATCH 3/5] UML - Only flush areas covered by VMA

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Message-ID: <20070426195624.GA9578@c2.user-mode-linux.org>
Date:	Thu, 26 Apr 2007 15:56:24 -0400
From:	Jeff Dike <jdike@...toit.com>
To:	Andrew Morton <akpm@...l.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	uml-devel <user-mode-linux-devel@...ts.sourceforge.net>
Subject: [PATCH 3/5] UML - Only flush areas covered by VMA

When doing a full address space flush, only look at areas covered by a VMA.

Signed-off-by: Jeff Dike <jdike@...ux.intel.com>
--
 arch/um/kernel/skas/tlb.c |    9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

Index: linux-2.6.21-mm/arch/um/kernel/skas/tlb.c
===================================================================
--- linux-2.6.21-mm.orig/arch/um/kernel/skas/tlb.c	2007-04-17 12:20:05.000000000 -0400
+++ linux-2.6.21-mm/arch/um/kernel/skas/tlb.c	2007-04-17 12:55:38.000000000 -0400
@@ -89,8 +89,13 @@ void flush_tlb_mm_skas(struct mm_struct 
 
 void force_flush_all_skas(void)
 {
-	unsigned long end = proc_mm ? task_size : CONFIG_STUB_START;
-        fix_range(current->mm, 0, end, 1);
+	struct mm_struct *mm = current->mm;
+	struct vm_area_struct *vma = mm->mmap;
+
+	while(vma != NULL) {
+		fix_range(mm, vma->vm_start, vma->vm_end, 1);
+		vma = vma->vm_next;
+	}
 }
 
 void flush_tlb_page_skas(struct vm_area_struct *vma, unsigned long address)
-
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