A-Team_Digital_Solutions/android_kernel_motorola_sm6375
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Make sure we copy pages inserted with "vm_insert_page()" on fork

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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 <[email protected]>

Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Linus Torvalds 2005-12-16 10:21:23 -08:00
commit 4d7672b462
4 changed files with 5 additions and 3 deletions
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2
mm/mremap.c
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@ -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;
}