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md-cluster: make md-cluster also can work when compiled into kernel

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The md-cluster is compiled as module by default,
if it is compiled by built-in way, then we can't
make md-cluster works.

[64782.630008] md/raid1:md127: active with 2 out of 2 mirrors
[64782.630528] md-cluster module not found.
[64782.630530] md127: Could not setup cluster service (-2)

Fixes: edb39c9 ("Introduce md_cluster_operations to handle cluster functions")
Cc: stable@vger.kernel.org (v4.1+)
Reported-by: Marc Smith <marc.smith@mcc.edu>
Reviewed-by: NeilBrown <neilb@suse.com>
Signed-off-by: Guoqing Jiang <gqjiang@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
This commit is contained in:
Guoqing Jiang 2016-09-04 22:17:28 -04:00 committed by Shaohua Li
parent ad5b0f7685
commit 47a7b0d888
1 changed files with 4 additions and 8 deletions
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12
drivers/md/md.c
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@ -7610,16 +7610,12 @@ EXPORT_SYMBOL(unregister_md_cluster_operations);
int md_setup_cluster(struct mddev *mddev, int nodes)
{
int err;
err = request_module("md-cluster");
if (err) {
pr_err("md-cluster module not found.\n");
return -ENOENT;
}
if (!md_cluster_ops)
request_module("md-cluster");
spin_lock(&pers_lock);
/* ensure module won't be unloaded */
if (!md_cluster_ops || !try_module_get(md_cluster_mod)) {
pr_err("can't find md-cluster module or get it's reference.\n");
spin_unlock(&pers_lock);
return -ENOENT;
}