linux-kernel - [PATCH 117/208] x86/fpu: Factor out fpu__init_cpu

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Date:	Tue,  5 May 2015 19:50:09 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	linux-kernel@...r.kernel.org
Cc:	Andy Lutomirski <luto@...capital.net>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Fenghua Yu <fenghua.yu@...el.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH 117/208] x86/fpu: Factor out fpu__init_cpu_generic()

Factor out the generic bits from fpu__init_cpu(), to create
a flat sequence of per CPU initialization function calls:

	fpu__init_cpu_generic();
	fpu__init_cpu_xstate();
	fpu__init_cpu_ctx_switch();

Reviewed-by: Borislav Petkov <bp@...en8.de>
Cc: Andy Lutomirski <luto@...capital.net>
Cc: Dave Hansen <dave.hansen@...ux.intel.com>
Cc: Fenghua Yu <fenghua.yu@...el.com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Oleg Nesterov <oleg@...hat.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/fpu/init.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/fpu/init.c b/arch/x86/kernel/fpu/init.c
index cf27bbed1ba1..37e8b139dc31 100644
--- a/arch/x86/kernel/fpu/init.c
+++ b/arch/x86/kernel/fpu/init.c
@@ -136,9 +136,9 @@ static void fpu__init_cpu_ctx_switch(void)
 }
 
 /*
- * Enable all supported FPU features. Called when a CPU is brought online.
+ * Initialize the registers found in all CPUs, CR0 and CR4:
  */
-void fpu__init_cpu(void)
+static void fpu__init_cpu_generic(void)
 {
 	unsigned long cr0;
 	unsigned long cr4_mask = 0;
@@ -163,7 +163,14 @@ void fpu__init_cpu(void)
 	if (!cpu_has_fpu)
 		cr0 |= X86_CR0_EM;
 	write_cr0(cr0);
+}
 
+/*
+ * Enable all supported FPU features. Called when a CPU is brought online.
+ */
+void fpu__init_cpu(void)
+{
+	fpu__init_cpu_generic();
 	fpu__init_cpu_xstate();
 	fpu__init_cpu_ctx_switch();
 }
-- 
2.1.0

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