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 <[email protected]>
Cc: Paolo 'Blaisorblade' Giarrusso <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/arch/um/kernel/skas/tlb.c b/arch/um/kernel/skas/tlb.c
index b3d722ddde31506480c95cedb776ca8dffc7821f..c0f0693743babd98095f834a73407876afcbe354 100644 (file)
--- a/arch/um/kernel/skas/tlb.c
+++ b/arch/um/kernel/skas/tlb.c
@@ -89,8 +89,13 @@ void flush_tlb_mm_skas(struct mm_struct *mm)
 
 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)