From: Tejun Heo Date: Thu, 5 Dec 2013 17:28:04 +0000 (-0500) Subject: cgroup: attach cgroup_open_file to all cgroup files X-Git-Tag: v3.14-rc1~136^2~15 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7da112792753d71aed44b918395892a1fc53048a;p=pandora-kernel.git cgroup: attach cgroup_open_file to all cgroup files In preparation of conversion to kernfs, cgroup file handling is updated so that it can be easily mapped to kernfs. This patch attaches cgroup_open_file, which used to be attached to pidlist files, to all cgroup files, introduces seq_css/cft() accessors to determine the cgroup_subsys_state and cftype associated with a given cgroup seq_file, exports them as public interface. This doesn't cause any behavior changes but unifies cgroup file handling across different file types and will help converting them to kernfs seq_show() interface. v2: Li pointed out that the original patch was using single_open_size() incorrectly assuming that the size param is private data size. Fix it by allocating @of separately and passing it to single_open() and explicitly freeing it in the release path. This isn't the prettiest but this path is gonna be restructured by the following patches pretty soon. Signed-off-by: Tejun Heo Acked-by: Li Zefan --- Reading git-diff-tree failed