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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/shmem.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/shmem.c')
-rw-r--r--mm/shmem.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/shmem.c b/mm/shmem.c
index dc25565a61e9..d9fc277940da 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -855,7 +855,7 @@ unlock:
855 swap_free(swap); 855 swap_free(swap);
856redirty: 856redirty:
857 set_page_dirty(page); 857 set_page_dirty(page);
858 return WRITEPAGE_ACTIVATE; /* Return with the page locked */ 858 return AOP_WRITEPAGE_ACTIVATE; /* Return with the page locked */
859} 859}
860 860
861#ifdef CONFIG_NUMA 861#ifdef CONFIG_NUMA