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authorDave Chinner <dchinner@redhat.com>2010-07-19 00:56:17 -0400
committerDave Chinner <david@fromorbit.com>2010-07-19 00:56:17 -0400
commit7f8275d0d660c146de6ee3017e1e2e594c49e820 (patch)
tree884db927118b44102750b5168ee36ef4b8b5cb4e /include
parentd0c6f6258478e1dba532bf7c28e2cd6e1047d3a4 (diff)
mm: add context argument to shrinker callback
The current shrinker implementation requires the registered callback to have global state to work from. This makes it difficult to shrink caches that are not global (e.g. per-filesystem caches). Pass the shrinker structure to the callback so that users can embed the shrinker structure in the context the shrinker needs to operate on and get back to it in the callback via container_of(). Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'include')
-rw-r--r--include/linux/mm.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index b969efb03787..a2b48041b910 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -999,7 +999,7 @@ static inline void sync_mm_rss(struct task_struct *task, struct mm_struct *mm)
999 * querying the cache size, so a fastpath for that case is appropriate. 999 * querying the cache size, so a fastpath for that case is appropriate.
1000 */ 1000 */
1001struct shrinker { 1001struct shrinker {
1002 int (*shrink)(int nr_to_scan, gfp_t gfp_mask); 1002 int (*shrink)(struct shrinker *, int nr_to_scan, gfp_t gfp_mask);
1003 int seeks; /* seeks to recreate an obj */ 1003 int seeks; /* seeks to recreate an obj */
1004 1004
1005 /* These are for internal use */ 1005 /* These are for internal use */