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backing-dev: Handle class_create() failure

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I hit this when we had a bug in IDR for a few days. Basically sysfs would
fail to create new inodes since it uses an IDR and therefore class_create would
fail.

While we are unlikely to see this fail we may as well handle it instead of
oopsing.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Anton Blanchard 2010-04-02 09:46:55 +02:00 committed by Jens Axboe
parent a506aedc51
commit 1442145373
1 changed files with 3 additions and 0 deletions
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mm/backing-dev.c
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@ -227,6 +227,9 @@ static struct device_attribute bdi_dev_attrs[] = {
static __init int bdi_class_init(void)
{
bdi_class = class_create(THIS_MODULE, "bdi");
if (IS_ERR(bdi_class))
return PTR_ERR(bdi_class);
bdi_class->dev_attrs = bdi_dev_attrs;
bdi_debug_init();
return 0;