diff options
Diffstat (limited to 'mm/madvise.c')
| -rw-r--r-- | mm/madvise.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/mm/madvise.c b/mm/madvise.c index 4d7d1e5ddba9..eea1c733286f 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -80,6 +80,17 @@ static long madvise_behavior(struct vm_area_struct *vma, } new_flags &= ~VM_DONTCOPY; break; + case MADV_WIPEONFORK: + /* MADV_WIPEONFORK is only supported on anonymous memory. */ + if (vma->vm_file || vma->vm_flags & VM_SHARED) { + error = -EINVAL; + goto out; + } + new_flags |= VM_WIPEONFORK; + break; + case MADV_KEEPONFORK: + new_flags &= ~VM_WIPEONFORK; + break; case MADV_DONTDUMP: new_flags |= VM_DONTDUMP; break; @@ -696,6 +707,8 @@ madvise_behavior_valid(int behavior) #endif case MADV_DONTDUMP: case MADV_DODUMP: + case MADV_WIPEONFORK: + case MADV_KEEPONFORK: #ifdef CONFIG_MEMORY_FAILURE case MADV_SOFT_OFFLINE: case MADV_HWPOISON: |