kernel/exit: Compute 'current' directly
authorDavidlohr Bueso <dave@stgolabs.net>
Tue, 3 Jan 2017 21:43:11 +0000 (13:43 -0800)
committerIngo Molnar <mingo@kernel.org>
Sat, 14 Jan 2017 10:14:11 +0000 (11:14 +0100)
commit0039962a1473f07fd5c8355bd8264be1eb87eb3e
tree1611eeff5b2804ebaa7bd89172d85dcd77ac9228
parentaef591cd3d1ddccb268f64c836d38382007373c1
kernel/exit: Compute 'current' directly

This patch effectively replaces the tsk pointer dereference (which is
obviously == current), to directly use get_current() macro. In this
case, do_exit() always passes current to exit_mm(), hence we can
simply get rid of the argument. This is also a performance win on some
archs such as x86-64 and ppc64 -- arm64 is no longer an issue.

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: dave@stgolabs.net
Cc: mark.rutland@arm.com
Link: http://lkml.kernel.org/r/1483479794-14013-2-git-send-email-dave@stgolabs.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
kernel/exit.c