UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

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>
This commit is contained in:
Jan Blunck 2010-02-24 13:25:34 +01:00 committed by Arnd Bergmann
parent efdffb5403
commit 38d018dba3
1 changed files with 0 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
kernel/cgroup.c
View File

@ -52,7 +52,6 @@
#include <linux/cgroupstats.h>
#include <linux/hash.h>
#include <linux/namei.h>
#include <linux/smp_lock.h>
#include <linux/pid_namespace.h>
#include <linux/idr.h>
#include <linux/vmalloc.h> /* TODO: replace with more sophisticated array */
@ -1222,7 +1221,6 @@ static int cgroup_remount(struct super_block *sb, int *flags, char *data)
struct cgroup *cgrp = &root->top_cgroup;
struct cgroup_sb_opts opts;
lock_kernel();
mutex_lock(&cgrp->dentry->d_inode->i_mutex);
mutex_lock(&cgroup_mutex);
@ -1255,7 +1253,6 @@ static int cgroup_remount(struct super_block *sb, int *flags, char *data)
kfree(opts.name);
mutex_unlock(&cgroup_mutex);
mutex_unlock(&cgrp->dentry->d_inode->i_mutex);
unlock_kernel();
return ret;
}
@ -1430,8 +1427,6 @@ static int cgroup_get_sb(struct file_system_type *fs_type,
struct super_block *sb;
struct cgroupfs_root *new_root;
lock_kernel();
/* First find the desired set of subsystems */
mutex_lock(&cgroup_mutex);
ret = parse_cgroupfs_options(data, &opts);
@ -1561,7 +1556,6 @@ static int cgroup_get_sb(struct file_system_type *fs_type,
simple_set_mnt(mnt, sb);
kfree(opts.release_agent);
kfree(opts.name);
unlock_kernel();
return 0;
drop_new_super:
@ -1571,8 +1565,6 @@ static int cgroup_get_sb(struct file_system_type *fs_type,
out_err:
kfree(opts.release_agent);
kfree(opts.name);
unlock_kernel();
return ret;
}