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authorDavid S. Miller <davem@davemloft.net>2008-10-01 06:12:56 -0700
committerDavid S. Miller <davem@davemloft.net>2008-10-01 06:12:56 -0700
commitb262e60309e1b0eb25d300c7e739427d5316abb1 (patch)
treebf319d78c79bb5cb617ff0c8340c73aa349bba15 /fs/ubifs/gc.c
parent93c8b90f01f0dc73891da4e84b26524b61d29d66 (diff)
parent0523820482dcb42784572ffd2296c2f08c275a2b (diff)
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts: drivers/net/wireless/ath9k/core.c drivers/net/wireless/ath9k/main.c net/core/dev.c
Diffstat (limited to 'fs/ubifs/gc.c')
-rw-r--r--fs/ubifs/gc.c20
1 files changed, 17 insertions, 3 deletions
diff --git a/fs/ubifs/gc.c b/fs/ubifs/gc.c
index d0f3dac2908..02aba36fe3d 100644
--- a/fs/ubifs/gc.c
+++ b/fs/ubifs/gc.c
@@ -334,15 +334,21 @@ int ubifs_garbage_collect_leb(struct ubifs_info *c, struct ubifs_lprops *lp)
err = move_nodes(c, sleb);
if (err)
- goto out;
+ goto out_inc_seq;
err = gc_sync_wbufs(c);
if (err)
- goto out;
+ goto out_inc_seq;
err = ubifs_change_one_lp(c, lnum, c->leb_size, 0, 0, 0, 0);
if (err)
- goto out;
+ goto out_inc_seq;
+
+ /* 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;
@@ -363,6 +369,14 @@ int ubifs_garbage_collect_leb(struct ubifs_info *c, struct ubifs_lprops *lp)
out:
ubifs_scan_destroy(sleb);
return err;
+
+out_inc_seq:
+ /* We may have moved at least some nodes so allow for races with TNC */
+ c->gced_lnum = lnum;
+ smp_wmb();
+ c->gc_seq += 1;
+ smp_wmb();
+ goto out;
}
/**