diff options
| author | Hugh Dickins <hugh@veritas.com> | 2006-06-23 11:03:45 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-23 16:42:52 +0200 |
| commit | 668e0d8f1a02fd75f1c1e8142a6b08455914242c (patch) | |
| tree | 51fafed7f9260fb969953a89280c77b69a416e84 | |
| parent | [PATCH] remove unused o_flags from do_shmat (diff) | |
| download | linux-668e0d8f1a02fd75f1c1e8142a6b08455914242c.tar.xz linux-668e0d8f1a02fd75f1c1e8142a6b08455914242c.zip | |
[PATCH] fix update_mmu_cache in fremap.c
There are two calls to update_mmu_cache in fremap.c, both defective.
The one in install_page needs to be accompanied by lazy_mmu_prot_update
(some other cleanup time, move that into ia64 update_mmu_cache itself); and
the one in install_file_pte should be removed since the pte is not present.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | mm/fremap.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/mm/fremap.c b/mm/fremap.c index 9f381e58bf44..21b7d0cbc98c 100644 --- a/mm/fremap.c +++ b/mm/fremap.c @@ -83,6 +83,7 @@ int install_page(struct mm_struct *mm, struct vm_area_struct *vma, page_add_file_rmap(page); pte_val = *pte; update_mmu_cache(vma, addr, pte_val); + lazy_mmu_prot_update(pte_val); err = 0; unlock: pte_unmap_unlock(pte, ptl); @@ -114,7 +115,13 @@ int install_file_pte(struct mm_struct *mm, struct vm_area_struct *vma, set_pte_at(mm, addr, pte, pgoff_to_pte(pgoff)); pte_val = *pte; - update_mmu_cache(vma, addr, pte_val); + /* + * We don't need to run update_mmu_cache() here because the "file pte" + * being installed by install_file_pte() is not a real pte - it's a + * non-present entry (like a swap entry), noting what file offset should + * be mapped there when there's a fault (in a non-linear vma where + * that's not obvious). + */ pte_unmap_unlock(pte, ptl); err = 0; out: |