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Li Zefan 36fd71d293 devcgroup: fix race against rmdir() 
During the use of a dev_cgroup, we should guarantee the corresponding
cgroup won't be deleted (i.e.  via rmdir).  This can be done through
css_get(&dev_cgroup->css), but here we can just get and use the dev_cgroup
under rcu_read_lock.

And also remove checking NULL dev_cgroup, it won't be NULL since a task
always belongs to a cgroup.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Cc: Paul Menage <menage@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2008-09-02 19:21:38 -07:00
..
keys keys: remove unused key_alloc_sem 2008-06-06 11:29:11 -07:00
selinux security: Fix setting of PF_SUPERPRIV by __capable() 2008-08-14 22:59:43 +10:00
smack security: Fix setting of PF_SUPERPRIV by __capable() 2008-08-14 22:59:43 +10:00
Kconfig security: filesystem capabilities no longer experimental 2008-07-24 10:47:22 -07:00
Makefile security: remove dummy module 2008-07-14 15:03:04 +10:00
capability.c security: Fix setting of PF_SUPERPRIV by __capable() 2008-08-14 22:59:43 +10:00
commoncap.c security: Fix setting of PF_SUPERPRIV by __capable() 2008-08-14 22:59:43 +10:00
device_cgroup.c devcgroup: fix race against rmdir() 2008-09-02 19:21:38 -07:00
inode.c
…
root_plug.c security: Fix setting of PF_SUPERPRIV by __capable() 2008-08-14 22:59:43 +10:00
security.c security: Fix setting of PF_SUPERPRIV by __capable() 2008-08-14 22:59:43 +10:00