drivers/tty: Compute 'current' directly
authorDavidlohr Bueso <dave@stgolabs.net>
Tue, 3 Jan 2017 21:43:12 +0000 (13:43 -0800)
committerIngo Molnar <mingo@kernel.org>
Sat, 14 Jan 2017 10:14:13 +0000 (11:14 +0100)
commit5376f2e722026e91cb46384bda8d8b3e9f88217c
treec3f73f7179ff9e118e73068923119562689f31ac
parent0039962a1473f07fd5c8355bd8264be1eb87eb3e
drivers/tty: Compute 'current' directly

This patch effectively replaces the tsk pointer dereference
(which is obviously == current), to directly use get_current()
macro. This is to make the removal of setting foreign task
states smoother and painfully obvious. Performance win on some
archs such as x86-64 and ppc64 -- arm64 is no longer an issue.

Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.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: mark.rutland@arm.com
Link: http://lkml.kernel.org/r/1483479794-14013-3-git-send-email-dave@stgolabs.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
drivers/tty/tty_ldsem.c