[PATCH 3/24] consolidate spinlock.h

Glauber de Oliveira Costa
2007-11-09T21:31:57Z

The cli and sti instructions need to be replaced by paravirt hooks.
For the i386 architecture, this is already done. The code requirements
aren't much different from x86_64 POV, so this part is consolidated in
the common header

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Jeremy Fitzhardinge <jeremy@xensource.com>
---
include/asm-x86/spinlock.h | 14 ++++++++++++++
include/asm-x86/spinlock_32.h | 9 ---------
include/asm-x86/spinlock_64.h | 8 +++++---
3 files changed, 19 insertions(+), 12 deletions(-)

diff --git a/include/asm-x86/spinlock.h b/include/asm-x86/spinlock.h
index d74d85e..e1d555a 100644
--- a/include/asm-x86/spinlock.h
+++ b/include/asm-x86/spinlock.h
@@ -1,5 +1,19 @@
+#ifndef _X86_SPINLOCK_H_
+#define _X86_SPINLOCK_H_
+
+#ifdef CONFIG_PARAVIRT
+#include <asm/paravirt.h>
+#else
+#define CLI_STRING "cli"
+#define STI_STRING "sti"
+#define CLI_STI_CLOBBERS
+#define CLI_STI_INPUT_ARGS
+#endif /* CONFIG_PARAVIRT */
+
#ifdef CONFIG_X86_32
# include "spinlock_32.h"
#else
# include "spinlock_64.h"
#endif
+
+#endif
diff --git a/include/asm-x86/spinlock_32.h b/include/asm-x86/spinlock_32.h
index d3bcebe..ebbf371 100644
--- a/include/asm-x86/spinlock_32.h
+++ b/include/asm-x86/spinlock_32.h
@@ -7,15 +7,6 @@
#include <asm/processor.h>
#include <linux/compiler.h>

-#ifdef CONFIG_PARAVIRT
-#include <asm/paravirt.h>
-#else
-#define CLI_STRING "cli"
-#define STI_STRING "sti"
-#define CLI_STI_CLOBBERS
-#define CLI_STI_INPUT_ARGS
-#endif /* CONFIG_PARAVIRT */
-
/*
* Your basic SMP spinlocks, allowing only a single CPU anywhere
*
diff --git a/include/asm-x86/spinlock_64.h b/include/asm-x86/spinlock_64.h
index 88bf981..e56b17e 100644
--- a/include/asm-x86/spinlock_64.h
+++ b/include/asm-x86/spinlock_64.h
@@ -48,12 +48,12 @@ static inline void __raw_spin_lock_flags(raw_spinlock_t *lock, unsigned long fla
"jns 5f\n"
"testl $0x200, %1\n\t" /* interrupts were disabled? */
"jz 4f\n\t"
- "sti\n"
+ STI_STRING "\n"
"3:\t"
"rep;nop\n\t"
"cmpl $0, %0\n\t"
"jle 3b\n\t"
- "cli\n\t"
+ CLI_STRING "\n\t"
"jmp 1b\n"
"4:\t"
"rep;nop\n\t"
@@ -61,7 +61,9 @@ static inline void __raw_spin_lock_flags(raw_spinlock_t *lock, unsigned long fla
"jg 1b\n\t"
"jmp 4b\n"
"5:\n\t"
- : "+m" (lock->slock) : "r" ((unsigned)flags) : "memory");
+ : "+m" (lock->slock)
+ : "r" ((unsigned)flags) CLI_STI_INPUT_ARGS
+ : "memory" CLI_STI_CLOBBERS);
}
#endif

--
1.4.4.2