pid namespaces: round up the API

The set of functions process_session, task_session, process_group and
task_pgrp is confusing, as the names can be mixed with each other when looking
at the code for a long time.

The proposals are to
* equip the functions that return the integer with _nr suffix to
  represent that fact,
* and to make all functions work with task (not process) by making
  the common prefix of the same name.

For monotony the routines signal_session() and set_signal_session() are
replaced with task_session_nr() and set_task_session(), especially since they
are only used with the explicit task->signal dereference.

Signed-off-by: Pavel Emelianov <xemul@openvz.org>
Acked-by: Serge E. Hallyn <serue@us.ibm.com>
Cc: Kirill Korotaev <dev@openvz.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Cedric Le Goater <clg@fr.ibm.com>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: Sukadev Bhattiprolu <sukadev@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 6e2f3b8dde7f..9ea2b99dc31a 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -1385,8 +1385,8 @@ static void fill_prstatus(struct elf_prstatus *prstatus,
         prstatus->pr_sighold = p->blocked.sig[0];
         prstatus->pr_pid = p->pid;
         prstatus->pr_ppid = p->parent->pid;
-        prstatus->pr_pgrp = process_group(p);
-        prstatus->pr_sid = process_session(p);
+        prstatus->pr_pgrp = task_pgrp_nr(p);
+        prstatus->pr_sid = task_session_nr(p);
         if (thread_group_leader(p)) {
                 /*
                  * This is the record for the group leader.  Add in the
@@ -1431,8 +1431,8 @@ static int fill_psinfo(struct elf_prpsinfo *psinfo, struct task_struct *p,
 
         psinfo->pr_pid = p->pid;
         psinfo->pr_ppid = p->parent->pid;
-        psinfo->pr_pgrp = process_group(p);
-        psinfo->pr_sid = process_session(p);
+        psinfo->pr_pgrp = task_pgrp_nr(p);
+        psinfo->pr_sid = task_session_nr(p);
 
         i = p->state ? ffz(~p->state) + 1 : 0;
         psinfo->pr_state = i;