diff options
| author | Jeff Garzik <jgarzik@pobox.com> | 2006-02-20 02:16:23 -0500 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2006-02-20 02:16:23 -0500 |
| commit | 5b2ffed906a3ebd4e52a5bbef06b99a517c53e4b (patch) | |
| tree | 2f900f89d93db6b0822d8bdf4f49851c581c12a6 /mm/madvise.c | |
| parent | f1b318793dcd2d9ff6b5ac06e7762098fa079cee (diff) | |
| parent | bd71c2b17468a2531fb4c81ec1d73520845e97e1 (diff) | |
Merge branch 'master'
Diffstat (limited to 'mm/madvise.c')
| -rw-r--r-- | mm/madvise.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/mm/madvise.c b/mm/madvise.c index ae0ae3ea299..af3d573b014 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -22,16 +22,23 @@ static long madvise_behavior(struct vm_area_struct * vma, struct mm_struct * mm = vma->vm_mm; int error = 0; pgoff_t pgoff; - int new_flags = vma->vm_flags & ~VM_READHINTMASK; + int new_flags = vma->vm_flags; switch (behavior) { + case MADV_NORMAL: + new_flags = new_flags & ~VM_RAND_READ & ~VM_SEQ_READ; + break; case MADV_SEQUENTIAL: - new_flags |= VM_SEQ_READ; + new_flags = (new_flags & ~VM_RAND_READ) | VM_SEQ_READ; break; case MADV_RANDOM: - new_flags |= VM_RAND_READ; + new_flags = (new_flags & ~VM_SEQ_READ) | VM_RAND_READ; break; - default: + case MADV_DONTFORK: + new_flags |= VM_DONTCOPY; + break; + case MADV_DOFORK: + new_flags &= ~VM_DONTCOPY; break; } @@ -177,6 +184,12 @@ madvise_vma(struct vm_area_struct *vma, struct vm_area_struct **prev, long error; switch (behavior) { + case MADV_DOFORK: + if (vma->vm_flags & VM_IO) { + error = -EINVAL; + break; + } + case MADV_DONTFORK: case MADV_NORMAL: case MADV_SEQUENTIAL: case MADV_RANDOM: |