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cgroup: remove cgroup_subsys argument from callbacks

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The argument is not used at all, and it's not necessary, because
a specific callback handler of course knows which subsys it
belongs to.

Now only ->pupulate() takes this argument, because the handlers of
this callback always call cgroup_add_file()/cgroup_add_files().

So we reduce a few lines of code, though the shrinking of object size
is minimal.

 16 files changed, 113 insertions(+), 162 deletions(-)

   text    data     bss     dec     hex filename
5486240  656987 7039960 13183187         c928d3 vmlinux.o.orig
5486170  656987 7039960 13183117         c9288d vmlinux.o

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Li Zefan
2012-01-31 13:47:36 +08:00
committed by Tejun Heo
parent 61d1d219c4
commit 761b3ef50e
16 changed files with 113 additions and 162 deletions
Download Patch File Download Diff File Expand all files Collapse all files
kernel/events/core.c
+5 -8
View File
@@ -6906,8 +6906,7 @@ unlock:
device_initcall(perf_event_sysfs_init);
#ifdef CONFIG_CGROUP_PERF
static struct cgroup_subsys_state *perf_cgroup_create(
struct cgroup_subsys *ss, struct cgroup *cont)
static struct cgroup_subsys_state *perf_cgroup_create(struct cgroup *cont)
{
struct perf_cgroup *jc;
@@ -6924,8 +6923,7 @@ static struct cgroup_subsys_state *perf_cgroup_create(
return &jc->css;
}
static void perf_cgroup_destroy(struct cgroup_subsys *ss,
struct cgroup *cont)
static void perf_cgroup_destroy(struct cgroup *cont)
{
struct perf_cgroup *jc;
jc = container_of(cgroup_subsys_state(cont, perf_subsys_id),
@@ -6941,8 +6939,7 @@ static int __perf_cgroup_move(void *info)
return 0;
}
static void perf_cgroup_attach(struct cgroup_subsys *ss, struct cgroup *cgrp,
struct cgroup_taskset *tset)
static void perf_cgroup_attach(struct cgroup *cgrp, struct cgroup_taskset *tset)
{
struct task_struct *task;
@@ -6950,8 +6947,8 @@ static void perf_cgroup_attach(struct cgroup_subsys *ss, struct cgroup *cgrp,
task_function_call(task, __perf_cgroup_move, task);
}
static void perf_cgroup_exit(struct cgroup_subsys *ss, struct cgroup *cgrp,
struct cgroup *old_cgrp, struct task_struct *task)
static void perf_cgroup_exit(struct cgroup *cgrp, struct cgroup *old_cgrp,
struct task_struct *task)
{
/*
* cgroup_exit() is called in the copy_process() failure path.