Uninline find_task_by_xxx set of functions

The find_task_by_something is a set of macros are used to find task by pid
depending on what kind of pid is proposed - global or virtual one.  All of
them are wrappers above the most generic one - find_task_by_pid_type_ns() -
and just substitute some args for it.

It turned out, that dereferencing the current->nsproxy->pid_ns construction
and pushing one more argument on the stack inline cause kernel text size to
grow.

This patch moves all this stuff out-of-line into kernel/pid.c.  Together
with the next patch it saves a bit less than 400 bytes from the .text
section.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Cc: Sukadev Bhattiprolu <sukadev@us.ibm.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Paul Menage <menage@google.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 5 deletions

diff --git a/kernel/sys.c b/kernel/sys.c
index 23620d52cf37..2befc299129d 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -152,8 +152,7 @@ asmlinkage long sys_setpriority(int which, int who, int niceval)
         switch (which) {
                 case PRIO_PROCESS:
                         if (who)
-                                p = find_task_by_pid_ns(who,
-                                                current->nsproxy->pid_ns);
+                                p = find_task_by_vpid(who);
                         else
                                 p = current;
                         if (p)
@@ -210,8 +209,7 @@ asmlinkage long sys_getpriority(int which, int who)
         switch (which) {
                 case PRIO_PROCESS:
                         if (who)
-                                p = find_task_by_pid_ns(who,
-                                                current->nsproxy->pid_ns);
+                                p = find_task_by_vpid(who);
                         else
                                 p = current;
                         if (p) {
@@ -1067,7 +1065,8 @@ asmlinkage long sys_setsid(void)
          * session id and so the check will always fail and make it so
          * init cannot successfully call setsid.
          */
-        if (session > 1 && find_task_by_pid_type(PIDTYPE_PGID, session))
+        if (session > 1 && find_task_by_pid_type_ns(PIDTYPE_PGID,
+                                session, &init_pid_ns))
                 goto out;
 
         group_leader->signal->leader = 1;