BKL: Remove BKL from cgroup
The BKL is only used in remount_fs and get_sb that are both protected by the superblocks s_umount rw_semaphore. Therefore it is safe to remove the BKL entirely. Signed-off-by: Jan Blunck <jblunck@infradead.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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1 changed files with 0 additions and 8 deletions
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@ -52,7 +52,6 @@
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#include <linux/cgroupstats.h>
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#include <linux/hash.h>
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#include <linux/namei.h>
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#include <linux/smp_lock.h>
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#include <linux/pid_namespace.h>
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#include <linux/idr.h>
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#include <linux/vmalloc.h> /* TODO: replace with more sophisticated array */
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@ -1222,7 +1221,6 @@ static int cgroup_remount(struct super_block *sb, int *flags, char *data)
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struct cgroup *cgrp = &root->top_cgroup;
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struct cgroup_sb_opts opts;
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lock_kernel();
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mutex_lock(&cgrp->dentry->d_inode->i_mutex);
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mutex_lock(&cgroup_mutex);
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@ -1255,7 +1253,6 @@ static int cgroup_remount(struct super_block *sb, int *flags, char *data)
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kfree(opts.name);
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mutex_unlock(&cgroup_mutex);
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mutex_unlock(&cgrp->dentry->d_inode->i_mutex);
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unlock_kernel();
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return ret;
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}
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@ -1430,8 +1427,6 @@ static int cgroup_get_sb(struct file_system_type *fs_type,
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struct super_block *sb;
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struct cgroupfs_root *new_root;
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lock_kernel();
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/* First find the desired set of subsystems */
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mutex_lock(&cgroup_mutex);
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ret = parse_cgroupfs_options(data, &opts);
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@ -1561,7 +1556,6 @@ static int cgroup_get_sb(struct file_system_type *fs_type,
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simple_set_mnt(mnt, sb);
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kfree(opts.release_agent);
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kfree(opts.name);
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unlock_kernel();
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return 0;
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drop_new_super:
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@ -1571,8 +1565,6 @@ static int cgroup_get_sb(struct file_system_type *fs_type,
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out_err:
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kfree(opts.release_agent);
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kfree(opts.name);
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unlock_kernel();
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return ret;
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}
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