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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 /include/linux/writeback.h
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 'include/linux/writeback.h')
-rw-r--r--include/linux/writeback.h6
1 files changed, 0 insertions, 6 deletions
diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index 343d883d69c5..64a36ba43b2f 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -60,12 +60,6 @@ struct writeback_control {
60}; 60};
61 61
62/* 62/*
63 * ->writepage() return values (make these much larger than a pagesize, in
64 * case some fs is returning number-of-bytes-written from writepage)
65 */
66#define WRITEPAGE_ACTIVATE 0x80000 /* IO was not started: activate page */
67
68/*
69 * fs/fs-writeback.c 63 * fs/fs-writeback.c
70 */ 64 */
71void writeback_inodes(struct writeback_control *wbc); 65void writeback_inodes(struct writeback_control *wbc);