Commit 45918e1a authored by Hugh Dickins's avatar Hugh Dickins Committed by Linus Torvalds
Browse files

[PATCH] dup_mmap: update comment on new vma 



Remove part of comment on linking new vma in dup_mmap: since anon_vma rmap
came in, try_to_unmap_one knows the vma without needing find_vma.  But add
a comment to note that here vma is inserted without mmap_sem.

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 91612e0d

kernel/fork.c

+3 −2
Original line number Diff line number Diff line
@@ -250,8 +250,9 @@ static inline int dup_mmap(struct mm_struct * mm, struct mm_struct * oldmm) 


		/*

		 * Link in the new vma and copy the page table entries:

		 * link in first so that swapoff can see swap entries,

		 * and try_to_unmap_one's find_vma find the new vma.

		 * link in first so that swapoff can see swap entries.

		 * Note that, exceptionally, here the vma is inserted

		 * without holding mm->mmap_sem.

		 */

		spin_lock(&mm->page_table_lock);

		*pprev = tmp;