linux-kernel - [RFC PATCH 4/5] powerpc: Use the new schedule

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Date:	Fri,  1 Feb 2013 18:27:44 +0800
From:	Li Zhong <zhong@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	linuxppc-dev@...ts.ozlabs.org, paulmck@...ux.vnet.ibm.com,
	fweisbec@...il.com, benh@...nel.crashing.org, paulus@...ba.org,
	Li Zhong <zhong@...ux.vnet.ibm.com>
Subject: [RFC PATCH 4/5] powerpc: Use the new schedule_user API on userspace preemption

This patch corresponds to
[PATCH] x86: Use the new schedule_user API on userspace preemption
  commit 0430499ce9d78691f3985962021b16bf8f8a8048

Signed-off-by: Li Zhong <zhong@...ux.vnet.ibm.com>
---
 arch/powerpc/include/asm/context_tracking.h |   11 +++++++++++
 arch/powerpc/kernel/entry_64.S              |    3 ++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/include/asm/context_tracking.h b/arch/powerpc/include/asm/context_tracking.h
index 3adccd8..2e042ba 100644
--- a/arch/powerpc/include/asm/context_tracking.h
+++ b/arch/powerpc/include/asm/context_tracking.h
@@ -1,6 +1,7 @@
 #ifndef _ASM_POWERPC_CONTEXT_TRACKING_H
 #define _ASM_POWERPC_CONTEXT_TRACKING_H
 
+#ifndef __ASSEMBLY__
 #include <linux/context_tracking.h>
 #include <asm/ptrace.h>
 
@@ -17,4 +18,14 @@ static inline void exception_exit(struct pt_regs *regs)
 #endif
 }
 
+#else /* __ASSEMBLY__ */
+
+#ifdef CONFIG_CONTEXT_TRACKING
+#define SCHEDULE_USER bl	.schedule_user
+#else
+#define SCHEDULE_USER bl	.schedule
+#endif
+
+#endif /* !__ASSEMBLY__ */
+
 #endif
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 3d990d3..91f09ec 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -33,6 +33,7 @@
 #include <asm/irqflags.h>
 #include <asm/ftrace.h>
 #include <asm/hw_irq.h>
+#include <asm/context_tracking.h>
 
 /*
  * System calls.
@@ -595,7 +596,7 @@ _GLOBAL(ret_from_except_lite)
 	andi.	r0,r4,_TIF_NEED_RESCHED
 	beq	1f
 	bl	.restore_interrupts
-	bl	.schedule
+	SCHEDULE_USER
 	b	.ret_from_except_lite
 
 1:	bl	.save_nvgprs
-- 
1.7.9.5

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