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authorLi Zefan <lizefan@huawei.com>2014-02-14 12:57:27 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-02-15 02:31:37 +0400
commitf41c593454943b80a2017c8a2a3d6b1d0b0a6f89 (patch)
tree3ecd1f3669b51386a716115a2da6809048149ce7 /fs/kernfs/mount.c
parent9383f4c6b66256c039c65ddc141f0caeeae51847 (diff)
downloadlinux-f41c593454943b80a2017c8a2a3d6b1d0b0a6f89.tar.xz
kernfs: fix kernfs_node_from_dentry()
Currently kernfs_node_from_dentry() returns NULL for root dentry, because root_dentry->d_op == NULL. Due to this bug cgroupstats_build() returns -EINVAL for root cgroup. # mount -t cgroup -o cpuacct /cgroup # Documentation/accounting/getdelays -C /cgroup fatal reply error, errno -22 With this fix: # Documentation/accounting/getdelays -C /cgroup sleeping 305, blocked 0, running 1, stopped 0, uninterruptible 1 Signed-off-by: Li Zefan <lizefan@huawei.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/kernfs/mount.c')
-rw-r--r--fs/kernfs/mount.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/kernfs/mount.c b/fs/kernfs/mount.c
index e5b28b0ebc37..405279b5517b 100644
--- a/fs/kernfs/mount.c
+++ b/fs/kernfs/mount.c
@@ -39,7 +39,7 @@ static int kernfs_sop_show_options(struct seq_file *sf, struct dentry *dentry)
return 0;
}
-static const struct super_operations kernfs_sops = {
+const struct super_operations kernfs_sops = {
.statfs = simple_statfs,
.drop_inode = generic_delete_inode,
.evict_inode = kernfs_evict_inode,