From a3cd613b2e775eb59816c2c7c49c038d54917208 Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Fri, 30 Oct 2009 12:26:53 +0100
Subject: [PATCH] microblaze: Add TRACE_IRQFLAGS_SUPPORT

There are just two major changes
Renamed local_irq functions to raw_local_irq in irq.c.
Added TRACE_IRQFLAGS_SUPPORT to Kconfig.debug.

Look at Documentation/irqflags-tracing.txt

Signed-off-by: Michal Simek <monstr@monstr.eu>
---
 arch/microblaze/Kconfig.debug          |   3 +
 arch/microblaze/include/asm/irqflags.h | 112 +++++++++++--------------
 arch/microblaze/kernel/cpu/pvr.c       |   2 +-
 3 files changed, 54 insertions(+), 63 deletions(-)

diff --git a/arch/microblaze/Kconfig.debug b/arch/microblaze/Kconfig.debug
index 242cd35bdb4..9dc708a7f70 100644
--- a/arch/microblaze/Kconfig.debug
+++ b/arch/microblaze/Kconfig.debug
@@ -3,6 +3,9 @@
 
 menu "Kernel hacking"
 
+config TRACE_IRQFLAGS_SUPPORT
+	def_bool y
+
 source "lib/Kconfig.debug"
 
 config EARLY_PRINTK
diff --git a/arch/microblaze/include/asm/irqflags.h b/arch/microblaze/include/asm/irqflags.h
index dea65645a4f..2c38c6d8017 100644
--- a/arch/microblaze/include/asm/irqflags.h
+++ b/arch/microblaze/include/asm/irqflags.h
@@ -10,78 +10,73 @@
 #define _ASM_MICROBLAZE_IRQFLAGS_H
 
 #include <linux/irqflags.h>
+#include <asm/registers.h>
 
 # if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
 
-# define local_irq_save(flags)				\
+# define raw_local_irq_save(flags)			\
 	do {						\
-		asm volatile ("# local_irq_save	\n\t"	\
-				"msrclr %0, %1	\n\t"	\
-				"nop	\n\t"		\
+		asm volatile ("	msrclr %0, %1;		\
+				nop;"			\
 				: "=r"(flags)		\
 				: "i"(MSR_IE)		\
 				: "memory");		\
 	} while (0)
 
-# define local_irq_disable()					\
-	do {							\
-		asm volatile ("# local_irq_disable \n\t"	\
-				"msrclr r0, %0 \n\t"		\
-				"nop	\n\t"			\
-				:				\
-				: "i"(MSR_IE)			\
-				: "memory");			\
+# define raw_local_irq_disable()			\
+	do {						\
+		asm volatile ("	msrclr r0, %0;		\
+				nop;"			\
+				:			\
+				: "i"(MSR_IE)		\
+				: "memory");		\
 	} while (0)
 
-# define local_irq_enable()					\
-	do {							\
-		asm volatile ("# local_irq_enable \n\t"		\
-				"msrset	r0, %0 \n\t"		\
-				"nop	\n\t"			\
-				:				\
-				: "i"(MSR_IE)			\
-				: "memory");			\
+# define raw_local_irq_enable()				\
+	do {						\
+		asm volatile ("	msrset	r0, %0;		\
+				nop;"			\
+				:			\
+				: "i"(MSR_IE)		\
+				: "memory");		\
 	} while (0)
 
 # else /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR == 0 */
 
-# define local_irq_save(flags)					\
+# define raw_local_irq_save(flags)				\
 	do {							\
 		register unsigned tmp;				\
-		asm volatile ("# local_irq_save	\n\t"		\
-				"mfs	%0, rmsr \n\t"		\
-				"nop \n\t"			\
-				"andi	%1, %0, %2 \n\t"	\
-				"mts	rmsr, %1 \n\t"		\
-				"nop \n\t"			\
+		asm volatile ("	mfs	%0, rmsr;		\
+				nop;				\
+				andi	%1, %0, %2;		\
+				mts	rmsr, %1;		\
+				nop;"				\
 				: "=r"(flags), "=r" (tmp)	\
 				: "i"(~MSR_IE)			\
 				: "memory");			\
 	} while (0)
 
-# define local_irq_disable()					\
+# define raw_local_irq_disable()				\
 	do {							\
 		register unsigned tmp;				\
-		asm volatile ("# local_irq_disable \n\t"	\
-				"mfs	%0, rmsr \n\t"		\
-				"nop \n\t"			\
-				"andi	%0, %0, %1 \n\t"	\
-				"mts	rmsr, %0 \n\t"		\
-				"nop \n\t"			\
+		asm volatile ("	mfs	%0, rmsr;		\
+				nop;				\
+				andi	%0, %0, %1;		\
+				mts	rmsr, %0;		\
+				nop;"			\
 				: "=r"(tmp)			\
 				: "i"(~MSR_IE)			\
 				: "memory");			\
 	} while (0)
 
-# define local_irq_enable()					\
+# define raw_local_irq_enable()					\
 	do {							\
 		register unsigned tmp;				\
-		asm volatile ("# local_irq_enable \n\t"		\
-				"mfs	%0, rmsr \n\t"		\
-				"nop \n\t"			\
-				"ori	%0, %0, %1 \n\t"	\
-				"mts	rmsr, %0 \n\t"		\
-				"nop \n\t"			\
+		asm volatile ("	mfs	%0, rmsr;		\
+				nop;				\
+				ori	%0, %0, %1;		\
+				mts	rmsr, %0;		\
+				nop;"				\
 				: "=r"(tmp)			\
 				: "i"(MSR_IE)			\
 				: "memory");			\
@@ -89,35 +84,28 @@
 
 # endif /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */
 
-#define local_save_flags(flags)					\
+#define raw_local_irq_restore(flags)				\
 	do {							\
-		asm volatile ("# local_save_flags \n\t"		\
-				"mfs	%0, rmsr \n\t"		\
-				"nop	\n\t"			\
-				: "=r"(flags)			\
+		asm volatile ("	mts	rmsr, %0;		\
+				nop;"				\
 				:				\
+				: "r"(flags)			\
 				: "memory");			\
 	} while (0)
 
-#define local_irq_restore(flags)			\
-	do {						\
-		asm volatile ("# local_irq_restore \n\t"\
-				"mts	rmsr, %0 \n\t"	\
-				"nop	\n\t"		\
-				:			\
-				: "r"(flags)		\
-				: "memory");		\
-	} while (0)
-
-static inline int irqs_disabled(void)
+static inline unsigned long get_msr(void)
 {
 	unsigned long flags;
-
-	local_save_flags(flags);
-	return ((flags & MSR_IE) == 0);
+	asm volatile ("	mfs	%0, rmsr;	\
+			nop;"			\
+			: "=r"(flags)		\
+			:			\
+			: "memory");		\
+	return flags;
 }
 
-#define raw_irqs_disabled irqs_disabled
-#define raw_irqs_disabled_flags(flags)	((flags) == 0)
+#define raw_local_save_flags(flags)	((flags) = get_msr())
+#define raw_irqs_disabled()		((get_msr() & MSR_IE) == 0)
+#define raw_irqs_disabled_flags(flags)	((flags & MSR_IE) == 0)
 
 #endif /* _ASM_MICROBLAZE_IRQFLAGS_H */
diff --git a/arch/microblaze/kernel/cpu/pvr.c b/arch/microblaze/kernel/cpu/pvr.c
index c9a4340ddd5..9bee9382bf7 100644
--- a/arch/microblaze/kernel/cpu/pvr.c
+++ b/arch/microblaze/kernel/cpu/pvr.c
@@ -45,7 +45,7 @@
 
 int cpu_has_pvr(void)
 {
-	unsigned flags;
+	unsigned long flags;
 	unsigned pvr0;
 
 	local_save_flags(flags);