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[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: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Hugh Dickins 2005-06-21 17:15:08 -07:00 committed by Linus Torvalds
parent 91612e0df2
commit 45918e1a8b
1 changed files with 3 additions and 2 deletions
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5
kernel/fork.c
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@ -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;