UBIFS: allow for racing between GC and TNC

[linux-2.6-omap-h63xx.git] / fs / ubifs / gc.c

diff --git a/fs/ubifs/gc.c b/fs/ubifs/gc.c
index d0f3dac2908133f1ea7398d8bac29ffbd5eaa8a8..13f1019c859f254bed9ee9512007b50ee79274da 100644 (file)
--- a/fs/ubifs/gc.c
+++ b/fs/ubifs/gc.c
@@ -344,6 +344,12 @@ int ubifs_garbage_collect_leb(struct ubifs_info *c, struct ubifs_lprops *lp)
                if (err)
                        goto out;
 
+               /* Allow for races with TNC */
+               c->gced_lnum = lnum;
+               smp_wmb();
+               c->gc_seq += 1;
+               smp_wmb();
+
                if (c->gc_lnum == -1) {
                        c->gc_lnum = lnum;
                        err = LEB_RETAINED;