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authorLinus Torvalds <torvalds@g5.osdl.org>2005-12-16 10:21:23 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-12-16 10:21:23 -0800
commit4d7672b46244abffea1953e55688c0ea143dd617 (patch)
tree9f3bdf438bcb0d5f6e723665ced23308fffb8368 /mm/mremap.c
parent281ab031a8c9e5b593142eb4ec59a87faae8676a (diff)
downloadop-kernel-dev-4d7672b46244abffea1953e55688c0ea143dd617.zip
op-kernel-dev-4d7672b46244abffea1953e55688c0ea143dd617.tar.gz
Make sure we copy pages inserted with "vm_insert_page()" on fork
The logic that decides that a fork() might be able to avoid copying a VM area when it can be re-created by page faults didn't know about the new vm_insert_page() case. Also make some things a bit more anal wrt VM_PFNMAP. Pointed out by Hugh Dickins <hugh@veritas.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/mremap.c')
-rw-r--r--mm/mremap.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/mremap.c b/mm/mremap.c
index b535438..ddaeee9 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -323,7 +323,7 @@ unsigned long do_mremap(unsigned long addr,
/* We can't remap across vm area boundaries */
if (old_len > vma->vm_end - addr)
goto out;
- if (vma->vm_flags & VM_DONTEXPAND) {
+ if (vma->vm_flags & (VM_DONTEXPAND | VM_PFNMAP)) {
if (new_len > old_len)
goto out;
}
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