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Commit 16bf1348 authored by Hugh Dickins's avatar Hugh Dickins Committed by Linus Torvalds
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[PATCH] compound page: no access_process_vm check 



The PageCompound check before access_process_vm's set_page_dirty_lock is no
longer necessary, so remove it.  But leave the PageCompound checks in
bio_set_pages_dirty, dio_bio_complete and nfs_free_user_pages: at least some
of those were introduced as a little optimization on hugetlb pages.

Signed-off-by: default avatarHugh Dickins <hugh@veritas.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent d98c7a09

kernel/ptrace.c

+1 −2
Original line number Diff line number Diff line
@@ -242,7 +242,6 @@ int access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, in 
		if (write) {

			copy_to_user_page(vma, page, addr,

					  maddr + offset, buf, bytes);

			if (!PageCompound(page))

			set_page_dirty_lock(page);

		} else {

			copy_from_user_page(vma, page, addr,