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From: Oleg Nesterov <oleg@redhat.com>
To: Al Viro <viro@ZenIV.linux.org.uk>,
	Andrew Morton <akpm@linux-foundation.org>,
	Fenghua Yu <fenghua.yu@intel.com>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Bean Anderson <bean@azulsystems.com>,
	"H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@redhat.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	x86@kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 3/5] x86, fpu: don't drop_fpu() in exit_thread() if use_eager_fpu()
Date: Sun, 24 Aug 2014 21:47:40 +0200	[thread overview]
Message-ID: <20140824194740.GA27444@redhat.com> (raw)
In-Reply-To: <20140824194700.GA27281@redhat.com>

Make exit_thread()->drop_fpu() depend on !use_eager_fpu(). This removes
another source of "use_eager_fpu() && !used_math()" special case.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
---
 arch/x86/kernel/process.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 5df9447..7474f56 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -120,7 +120,8 @@ void exit_thread(void)
 		kfree(bp);
 	}
 
-	drop_fpu(me);
+	if (!use_eager_fpu())
+		drop_fpu(me);
 }
 
 void flush_thread(void)
-- 
1.5.5.1


  parent reply	other threads:[~2014-08-24 19:50 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-08-22 17:11 [PATCH 0/1] x86, fpu: shift drop_init_fpu() from save_xstate_sig() to handle_signal() Oleg Nesterov
2014-08-22 17:12 ` [PATCH 1/1] " Oleg Nesterov
2014-08-24 19:47 ` [PATCH 0/5] x86, fpu: make use_eager_fpu() more eager Oleg Nesterov
2014-08-24 19:47   ` [PATCH 1/5] x86, fpu: change sanitize_restored_xstate() and convert_to_fxsr() to accept thread_xstate Oleg Nesterov
2014-08-24 19:47   ` [PATCH 2/5] x86, fpu: don't drop_fpu() in __restore_xstate_sig() if use_eager_fpu() Oleg Nesterov
2014-08-24 20:05     ` Linus Torvalds
2014-08-25 14:26       ` Oleg Nesterov
2014-08-25 14:41       ` Oleg Nesterov
2014-08-25 16:27         ` Linus Torvalds
2014-08-25 17:09           ` Oleg Nesterov
2014-08-25 17:26             ` Linus Torvalds
2014-08-25 17:39               ` Oleg Nesterov
2014-08-27 17:02                 ` Oleg Nesterov
2014-08-24 19:47   ` Oleg Nesterov [this message]
2014-08-24 19:47   ` [PATCH 4/5] x86, fpu: shift init_fpu() from eager_fpu_init() to eager_fpu_init_bp() Oleg Nesterov
2014-08-24 19:47   ` [PATCH 5/5] x86, fpu: sanitize the usage of use_eager_fpu() in switch_fpu_prepare() Oleg Nesterov
2014-08-25 18:08 ` [PATCH] x86, fpu: __restore_xstate_sig()->math_state_restore() needs preempt_disable() Oleg Nesterov
2014-09-02  5:01   ` Suresh Siddha

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