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>

2 files changed, 3 insertions, 3 deletions

diff --git a/fs/autofs/inode.c b/fs/autofs/inode.c
index e7204d71acc9..45f5992a0957 100644
--- a/fs/autofs/inode.c
+++ b/fs/autofs/inode.c
@@ -80,7 +80,7 @@ static int parse_options(char *options, int *pipefd, uid_t *uid, gid_t *gid,
 
         *uid = current->uid;
         *gid = current->gid;
-        *pgrp = process_group(current);
+        *pgrp = task_pgrp_nr(current);
 
         *minproto = *maxproto = AUTOFS_PROTO_VERSION;
 
diff --git a/fs/autofs/root.c b/fs/autofs/root.c
index c1489533277a..592f64037ae2 100644
--- a/fs/autofs/root.c
+++ b/fs/autofs/root.c
@@ -215,7 +215,7 @@ static struct dentry *autofs_root_lookup(struct inode *dir, struct dentry *dentr
         oz_mode = autofs_oz_mode(sbi);
         DPRINTK(("autofs_lookup: pid = %u, pgrp = %u, catatonic = %d, "
                                 "oz_mode = %d\n", pid_nr(task_pid(current)),
-                                process_group(current), sbi->catatonic,
+                                task_pgrp_nr(current), sbi->catatonic,
                                 oz_mode));
 
         /*
@@ -536,7 +536,7 @@ static int autofs_root_ioctl(struct inode *inode, struct file *filp,
         struct autofs_sb_info *sbi = autofs_sbi(inode->i_sb);
         void __user *argp = (void __user *)arg;
 
-        DPRINTK(("autofs_ioctl: cmd = 0x%08x, arg = 0x%08lx, sbi = %p, pgrp = %u\n",cmd,arg,sbi,process_group(current)));
+        DPRINTK(("autofs_ioctl: cmd = 0x%08x, arg = 0x%08lx, sbi = %p, pgrp = %u\n",cmd,arg,sbi,task_pgrp_nr(current)));
 
         if (_IOC_TYPE(cmd) != _IOC_TYPE(AUTOFS_IOC_FIRST) ||
              _IOC_NR(cmd) - _IOC_NR(AUTOFS_IOC_FIRST) >= AUTOFS_IOC_COUNT)