bdi: register sysfs bdi device only once per queue

[linux-2.6-omap-h63xx.git] / mm / backing-dev.c

diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index f2e574dbc30089d778880d2ad178d5dd48174034..2a56124dbc28effcbda0a48c2268d1b7f763ee91 100644 (file)
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -176,6 +176,9 @@ int bdi_register(struct backing_dev_info *bdi, struct device *parent,
        int ret = 0;
        struct device *dev;
 
+       if (WARN_ON(bdi->dev))
+               goto exit;
+
        va_start(args, fmt);
        dev = device_create_vargs(bdi_class, parent, MKDEV(0, 0), bdi, fmt, args);
        va_end(args);