linux-kernel - [PATCH 20/25] [PATCH] replace syscall

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Date:	Wed,  8 Aug 2007 01:19:07 -0300
From:	Glauber de Oliveira Costa <gcosta@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	akpm@...ux-foundation.org, rusty@...tcorp.com.au, ak@...e.de,
	mingo@...e.hu, chrisw@...s-sol.org, jeremy@...p.org,
	avi@...ranet.com, anthony@...emonkey.ws,
	virtualization@...ts.linux-foundation.org, lguest@...abs.org,
	Glauber de Oliveira Costa <gcosta@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: [PATCH 20/25] [PATCH] replace syscall_init

This patch replaces syscall_init by x86_64_syscall_init.
The former will be later replaced by a paravirt replacement
in case paravirt is on

Signed-off-by: Glauber de Oliveira Costa <gcosta@...hat.com>
Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
---
 arch/x86_64/kernel/setup64.c |    8 +++++++-
 include/asm-x86_64/proto.h   |    3 +++
 2 files changed, 10 insertions(+), 1 deletions(-)

diff --git a/arch/x86_64/kernel/setup64.c b/arch/x86_64/kernel/setup64.c
index 49f7342..723822c 100644
--- a/arch/x86_64/kernel/setup64.c
+++ b/arch/x86_64/kernel/setup64.c
@@ -153,7 +153,7 @@ __attribute__((section(".bss.page_aligned")));
 extern asmlinkage void ignore_sysret(void);
 
 /* May not be marked __init: used by software suspend */
-void syscall_init(void)
+void x86_64_syscall_init(void)
 {
 	/* 
 	 * LSTAR and STAR live in a bit strange symbiosis.
@@ -172,6 +172,12 @@ void syscall_init(void)
 	wrmsrl(MSR_SYSCALL_MASK, EF_TF|EF_DF|EF_IE|0x3000); 
 }
 
+/* Overriden in paravirt.c if CONFIG_PARAVIRT */
+void __attribute__((weak)) syscall_init(void)
+{
+	x86_64_syscall_init();
+}
+
 void __cpuinit check_efer(void)
 {
 	unsigned long efer;
diff --git a/include/asm-x86_64/proto.h b/include/asm-x86_64/proto.h
index 31f20ad..77ed2de 100644
--- a/include/asm-x86_64/proto.h
+++ b/include/asm-x86_64/proto.h
@@ -18,6 +18,9 @@ extern void init_memory_mapping(unsigned long start, unsigned long end);
 
 extern void system_call(void); 
 extern int kernel_syscall(void);
+#ifdef CONFIG_PARAVIRT
+extern void x86_64_syscall_init(void);
+#endif
 extern void syscall_init(void);
 
 extern void ia32_syscall(void);
-- 
1.4.4.2

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