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cgroup: pass around cgroup_subsys_state instead of cgroup in file methods

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cgroup is currently in the process of transitioning to using struct
cgroup_subsys_state * as the primary handle instead of struct cgroup.
Please see the previous commit which converts the subsystem methods
for rationale.

This patch converts all cftype file operations to take @css instead of
@cgroup.  cftypes for the cgroup core files don't have their subsytem
pointer set.  These will automatically use the dummy_css added by the
previous patch and can be converted the same way.

Most subsystem conversions are straight forwards but there are some
interesting ones.

* freezer: update_if_frozen() is also converted to take @css instead
  of @cgroup for consistency.  This will make the code look simpler
  too once iterators are converted to use css.

* memory/vmpressure: mem_cgroup_from_css() needs to be exported to
  vmpressure while mem_cgroup_from_cont() can be made static.
  Updated accordingly.

* cpu: cgroup_tg() doesn't have any user left.  Removed.

* cpuacct: cgroup_ca() doesn't have any user left.  Removed.

* hugetlb: hugetlb_cgroup_form_cgroup() doesn't have any user left.
  Removed.

* net_cls: cgrp_cls_state() doesn't have any user left.  Removed.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Aristeu Rozanski <aris@redhat.com>
Acked-by: Daniel Wagner <daniel.wagner@bmw-carit.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: Matt Helsley <matthltc@us.ibm.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Tejun Heo
2013-08-08 20:11:24 -04:00
parent 67f4c36f83
commit 182446d087
17 changed files with 322 additions and 328 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
security/device_cgroup.c
View File

@@ -289,10 +289,10 @@ static void set_majmin(char *str, unsigned m)
sprintf(str, "%u", m);
}
static int devcgroup_seq_read(struct cgroup *cgroup, struct cftype *cft,
struct seq_file *m)
static int devcgroup_seq_read(struct cgroup_subsys_state *css,
struct cftype *cft, struct seq_file *m)
{
struct dev_cgroup *devcgroup = cgroup_to_devcgroup(cgroup);
struct dev_cgroup *devcgroup = css_to_devcgroup(css);
struct dev_exception_item *ex;
char maj[MAJMINLEN], min[MAJMINLEN], acc[ACCLEN];
@@ -669,13 +669,13 @@ static int devcgroup_update_access(struct dev_cgroup *devcgroup,
return rc;
}
static int devcgroup_access_write(struct cgroup *cgrp, struct cftype *cft,
const char *buffer)
static int devcgroup_access_write(struct cgroup_subsys_state *css,
struct cftype *cft, const char *buffer)
{
int retval;
mutex_lock(&devcgroup_mutex);
retval = devcgroup_update_access(cgroup_to_devcgroup(cgrp),
retval = devcgroup_update_access(css_to_devcgroup(css),
cft->private, buffer);
mutex_unlock(&devcgroup_mutex);
return retval;