From: Oleg Nesterov <oleg@redhat.com>
Date: Fri, 6 Feb 2015 20:01:58 +0000 (-0500)
Subject: x86/fpu: Don't reset thread.fpu_counter
X-Git-Tag: omap-for-v4.1/fixes-rc1~189^2~12^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a9241ea5fd709fc935dade130f4e3b2612bbe9e3;p=pandora-kernel.git

x86/fpu: Don't reset thread.fpu_counter

The "else" branch clears ->fpu_counter as a remnant of the lazy FPU
usage counting:

  e07e23e1fd30 ("[PATCH] non lazy "sleazy" fpu implementation")

However, switch_fpu_prepare() does this now so that else branch is
superfluous.

If we do use_eager_fpu(), then this has no effect. Otherwise, if we
actually wanted to prevent fpu preload after the context switch we would
need to reset it unconditionally, even if __thread_has_fpu().

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Rik van Riel <riel@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1423252925-14451-2-git-send-email-riel@redhat.com
Signed-off-by: Borislav Petkov <bp@suse.de>
---

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