[PATCH] remap_file_pages() speedup
Avoid taking down_write(mmap_sem) unless we really need it. Seems that the only reason we're taking it for writing is to protect vma->vm_flags. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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