posix-timers: Noralize good_sigevent
authorEric W. Biederman <ebiederm@xmission.com>
Sat, 21 Jul 2018 05:00:29 +0000 (00:00 -0500)
committerEric W. Biederman <ebiederm@xmission.com>
Sat, 21 Jul 2018 15:43:12 +0000 (10:43 -0500)
commit2118e1f53f6f0973a1d9a6a7dc9296959bf39ec0
tree7ff0387ebe57636883dadc12ef2c596b8681fb94
parent019191342fecce4a461978a7191a43f313e19e86
posix-timers: Noralize good_sigevent

In good_sigevent directly compute the default return value as
"task_tgid(current)".  This is exactly the same as
"task_pid(current->group_leader)" but written more clearly.

In the thread case first compute the thread's pid.  Then veify that
attached to that pid is a thread of the current thread group.

This has the net effect of making the code a little clearer, and
making it obvious that posix timers never look up a process by a the
pid of a thread.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
kernel/time/posix-timers.c