From 812cb83a56a908729c453a7db3fb2c262119bc9d Mon Sep 17 00:00:00 2001
From: Kirill Tkhai <tkhai@yandex.ru>
Date: Sat, 14 Sep 2013 16:02:11 +0400
Subject: sparc64: Implement HAVE_CONTEXT_TRACKING

Mark the places when the system are in user or are in kernel.
This is used to make full dynticks system (tickless) --
CONFIG_NO_HZ_FULL dependence.

Signed-off-by: Kirill Tkhai <tkhai@yandex.ru>
CC: David Miller <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 arch/sparc/kernel/kprobes.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'arch/sparc/kernel/kprobes.c')

diff --git a/arch/sparc/kernel/kprobes.c b/arch/sparc/kernel/kprobes.c
index e72212148d2a..5a09fd315e5f 100644
--- a/arch/sparc/kernel/kprobes.c
+++ b/arch/sparc/kernel/kprobes.c
@@ -8,6 +8,7 @@
 #include <linux/module.h>
 #include <linux/kdebug.h>
 #include <linux/slab.h>
+#include <linux/context_tracking.h>
 #include <asm/signal.h>
 #include <asm/cacheflush.h>
 #include <asm/uaccess.h>
@@ -418,12 +419,14 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self,
 asmlinkage void __kprobes kprobe_trap(unsigned long trap_level,
 				      struct pt_regs *regs)
 {
+	enum ctx_state prev_state = exception_enter();
+
 	BUG_ON(trap_level != 0x170 && trap_level != 0x171);
 
 	if (user_mode(regs)) {
 		local_irq_enable();
 		bad_trap(regs, trap_level);
-		return;
+		goto out;
 	}
 
 	/* trap_level == 0x170 --> ta 0x70
@@ -433,6 +436,8 @@ asmlinkage void __kprobes kprobe_trap(unsigned long trap_level,
 		       (trap_level == 0x170) ? "debug" : "debug_2",
 		       regs, 0, trap_level, SIGTRAP) != NOTIFY_STOP)
 		bad_trap(regs, trap_level);
+out:
+	exception_exit(prev_state);
 }
 
 /* Jprobes support.  */
-- 
cgit