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authorLinus Torvalds <torvalds@linux-foundation.org>2012-03-21 13:32:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-03-21 13:32:19 -0700
commit3a990a52f9f25f45469e272017a31e7a3fda60ed (patch)
tree366f639d9ce1e907b65caa72bc098df6c4b5a240 /mm/mmap.c
parent3556485f1595e3964ba539e39ea682acbb835cee (diff)
parentf5cc4eef9987d0b517364d01e290d6438e47ee5d (diff)
downloadlinux-3a990a52f9f25f45469e272017a31e7a3fda60ed.tar.bz2
Merge branch 'vm' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull munmap/truncate race fixes from Al Viro: "Fixes for racy use of unmap_vmas() on truncate-related codepaths" * 'vm' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: VM: make zap_page_range() callers that act on a single VMA use separate helper VM: make unmap_vmas() return void VM: don't bother with feeding upper limit to tlb_finish_mmu() in exit_mmap() VM: make zap_page_range() return void VM: can't go through the inner loop in unmap_vmas() more than once... VM: unmap_page_range() can return void
Diffstat (limited to 'mm/mmap.c')
-rw-r--r--mm/mmap.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/mm/mmap.c b/mm/mmap.c
index 39a68ddf38bd..6f3766b57803 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2237,7 +2237,6 @@ void exit_mmap(struct mm_struct *mm)
struct mmu_gather tlb;
struct vm_area_struct *vma;
unsigned long nr_accounted = 0;
- unsigned long end;
/* mm's last user has gone, and its about to be pulled down */
mmu_notifier_release(mm);
@@ -2262,11 +2261,11 @@ void exit_mmap(struct mm_struct *mm)
tlb_gather_mmu(&tlb, mm, 1);
/* update_hiwater_rss(mm) here? but nobody should be looking */
/* Use -1 here to ensure all VMAs in the mm are unmapped */
- end = unmap_vmas(&tlb, vma, 0, -1, &nr_accounted, NULL);
+ unmap_vmas(&tlb, vma, 0, -1, &nr_accounted, NULL);
vm_unacct_memory(nr_accounted);
free_pgtables(&tlb, vma, FIRST_USER_ADDRESS, 0);
- tlb_finish_mmu(&tlb, 0, end);
+ tlb_finish_mmu(&tlb, 0, -1);
/*
* Walk the list again, actually closing and freeing it,