korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-28 06:34:12 +08:00
Code Issues Packages Projects Releases Wiki Activity

[PATCH] page_add_file_rmap(): remove BUG_ON()s

Browse Source 
Remove two early-development BUG_ONs from page_add_file_rmap.

The pfn_valid test (originally useful for checking that nobody passed an
artificial struct page) comes too late, since we already have the struct
page.

The PageAnon test (useful when anon was first distinguished from file rmap)
prevents ->nopage implementations from reusing ->mapping, which would
otherwise be available.

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 2006-03-09 17:33:34 -08:00 committed by Linus Torvalds
parent 6218cf4410
commit 85a6cd03a9
1 changed files with 0 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
mm/rmap.c
View File

@ -537,9 +537,6 @@ void page_add_new_anon_rmap(struct page *page,
*/
void page_add_file_rmap(struct page *page)
{
BUG_ON(PageAnon(page));
BUG_ON(!pfn_valid(page_to_pfn(page)));
if (atomic_inc_and_test(&page->_mapcount))
__inc_page_state(nr_mapped);
}