From: Andrew Morton <akpm@osdl.org>

Cc: Jiri Slaby <jirislaby@gmail.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/vmscan.c |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff -puN mm/vmscan.c~shrink_slab-handle-bad-shrinkers mm/vmscan.c
--- a/mm/vmscan.c~shrink_slab-handle-bad-shrinkers
+++ a/mm/vmscan.c
@@ -20,6 +20,7 @@
 #include <linux/pagemap.h>
 #include <linux/init.h>
 #include <linux/highmem.h>
+#include <linux/kallsyms.h>
 #include <linux/vmstat.h>
 #include <linux/file.h>
 #include <linux/writeback.h>
@@ -170,7 +171,13 @@ unsigned long shrink_slab(unsigned long 
 		unsigned long total_scan;
 		unsigned long max_pass = (*shrinker->shrink)(0, gfp_mask);
 
-		delta = (4 * scanned) / shrinker->seeks;
+		if (!shrinker->seeks) {
+			print_symbol("shrinker %s has zero seeks\n",
+				(unsigned long)shrinker->shrink);
+			delta = (4 * scanned) / DEFAULT_SEEKS;
+		} else {
+			delta = (4 * scanned) / shrinker->seeks;
+		}
 		delta *= max_pass;
 		do_div(delta, lru_pages + 1);
 		shrinker->nr += delta;
_