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cgroup: kill cgrp_ss_priv[CGROUP_CANFORK_COUNT] and friends

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Now that nobody use the "priv" arg passed to can_fork/cancel_fork/fork we can
kill CGROUP_CANFORK_COUNT/SUBSYS_TAG/etc and cgrp_ss_priv[] in copy_process().

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Oleg Nesterov
2015-12-03 10:24:08 -05:00
committed by Tejun Heo
parent 8075b542cf
commit b53202e630
8 changed files with 23 additions and 71 deletions
Download Patch File Download Diff File Expand all files Collapse all files
kernel/fork.c
+3 -4
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@@ -1249,7 +1249,6 @@ static struct task_struct *copy_process(unsigned long clone_flags,
{
int retval;
struct task_struct *p;
void *cgrp_ss_priv[CGROUP_CANFORK_COUNT] = {};
if ((clone_flags & (CLONE_NEWNS|CLONE_FS)) == (CLONE_NEWNS|CLONE_FS))
return ERR_PTR(-EINVAL);
@@ -1526,7 +1525,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
* between here and cgroup_post_fork() if an organisation operation is in
* progress.
*/
retval = cgroup_can_fork(p, cgrp_ss_priv);
retval = cgroup_can_fork(p);
if (retval)
goto bad_fork_free_pid;
@@ -1608,7 +1607,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
write_unlock_irq(&tasklist_lock);
proc_fork_connector(p);
cgroup_post_fork(p, cgrp_ss_priv);
cgroup_post_fork(p);
threadgroup_change_end(current);
perf_event_fork(p);
@@ -1618,7 +1617,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
return p;
bad_fork_cancel_cgroup:
cgroup_cancel_fork(p, cgrp_ss_priv);
cgroup_cancel_fork(p);
bad_fork_free_pid:
if (pid != &init_struct_pid)
free_pid(pid);