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authorZach Brown <zach.brown@oracle.com>2005-12-15 17:28:17 -0500
committerJoel Becker <joel.becker@oracle.com>2006-01-03 14:45:42 -0500
commit994fc28c7b1e697ac56befe4aecabf23f0689f46 (patch)
treeda36d162e9bd077e9b5be385b28e2db90475c263 /mm/vmscan.c
parent7063fbf2261194f72ee75afca67b3b38b554b5fa (diff)
[PATCH] add AOP_TRUNCATED_PAGE, prepend AOP_ to WRITEPAGE_ACTIVATE
readpage(), prepare_write(), and commit_write() callers are updated to understand the special return code AOP_TRUNCATED_PAGE in the style of writepage() and WRITEPAGE_ACTIVATE. AOP_TRUNCATED_PAGE tells the caller that the callee has unlocked the page and that the operation should be tried again with a new page. OCFS2 uses this to detect and work around a lock inversion in its aop methods. There should be no change in behaviour for methods that don't return AOP_TRUNCATED_PAGE. WRITEPAGE_ACTIVATE is also prepended with AOP_ for consistency and they are made enums so that kerneldoc can be used to document their semantics. Signed-off-by: Zach Brown <zach.brown@oracle.com>
Diffstat (limited to 'mm/vmscan.c')
-rw-r--r--mm/vmscan.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index b0cd81c32de6..795a050fe471 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -367,7 +367,7 @@ static pageout_t pageout(struct page *page, struct address_space *mapping)
367 res = mapping->a_ops->writepage(page, &wbc); 367 res = mapping->a_ops->writepage(page, &wbc);
368 if (res < 0) 368 if (res < 0)
369 handle_write_error(mapping, page, res); 369 handle_write_error(mapping, page, res);
370 if (res == WRITEPAGE_ACTIVATE) { 370 if (res == AOP_WRITEPAGE_ACTIVATE) {
371 ClearPageReclaim(page); 371 ClearPageReclaim(page);
372 return PAGE_ACTIVATE; 372 return PAGE_ACTIVATE;
373 } 373 }