From: Martin Schwidefsky <schwidefsky@de.ibm.com>
Date: Wed, 24 Apr 2013 10:58:39 +0000 (+0200)
Subject: s390: system call path micro optimization
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~146^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=616498813b11ffefe1ed36b9f2e4fd2cdbd22f15;p=pandora-kernel.git

s390: system call path micro optimization

Add a pointer to the system call table to the thread_info structure.
The TIF_31BIT bit is set or cleared by SET_PERSONALITY exactly once
for the lifetime of a process. With the pointer to the correct system
call table in thread_info the system call code in entry64.S path can
drop the check for TIF_31BIT which saves a couple of instructions.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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