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From: Huang Ying <ying.huang@intel.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>,
	Pavel Machek <pavel@ucw.cz>,
	nigel@nigel.suspend2.net, "Rafael J. Wysocki" <rjw@sisk.pl>,
	Andrew Morton <akpm@linux-foundation.org>,
	Vivek Goyal <vgoyal@redhat.com>,
	mingo@elte.hu, Linus Torvalds <torvalds@linux-foundation.org>
Cc: Kexec Mailing List <kexec@lists.infradead.org>,
	linux-kernel@vger.kernel.org
Subject: [PATCH -v2 7/8] kexec jump: ftrace_enabled_save/restore
Date: Fri, 08 Aug 2008 14:52:48 +0800	[thread overview]
Message-ID: <1218178368.22039.80.camel@caritas-dev.intel.com> (raw)

Add ftrace_enabled_save/restore, used to disable ftrace for a
while. This is used by kexec jump.

Signed-off-by: Huang Ying <ying.huang@intel.com>

---
 include/linux/ftrace.h |   18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -98,6 +98,24 @@ static inline void tracer_disable(void)
 #endif
 }
 
+static inline int ftrace_enabled_save(void)
+{
+#ifdef CONFIG_FTRACE
+	int saved_ftrace_enabled = ftrace_enabled;
+	ftrace_enabled = 0;
+	return saved_ftrace_enabled;
+#else
+	return 0;
+#endif
+}
+
+static inline void ftrace_enabled_restore(int enabled)
+{
+#ifdef CONFIG_FTRACE
+	ftrace_enabled = enabled;
+#endif
+}
+
 #ifdef CONFIG_FRAME_POINTER
 /* TODO: need to fix this for ARM */
 # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))



_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec

WARNING: multiple messages have this Message-ID (diff)
From: Huang Ying <ying.huang@intel.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>,
	Pavel Machek <pavel@ucw.cz>,
	nigel@nigel.suspend2.net, "Rafael J. Wysocki" <rjw@sisk.pl>,
	Andrew Morton <akpm@linux-foundation.org>,
	Vivek Goyal <vgoyal@redhat.com>,
	mingo@elte.hu, Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org,
	Kexec Mailing List <kexec@lists.infradead.org>
Subject: [PATCH -v2 7/8] kexec jump: ftrace_enabled_save/restore
Date: Fri, 08 Aug 2008 14:52:48 +0800	[thread overview]
Message-ID: <1218178368.22039.80.camel@caritas-dev.intel.com> (raw)

Add ftrace_enabled_save/restore, used to disable ftrace for a
while. This is used by kexec jump.

Signed-off-by: Huang Ying <ying.huang@intel.com>

---
 include/linux/ftrace.h |   18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -98,6 +98,24 @@ static inline void tracer_disable(void)
 #endif
 }
 
+static inline int ftrace_enabled_save(void)
+{
+#ifdef CONFIG_FTRACE
+	int saved_ftrace_enabled = ftrace_enabled;
+	ftrace_enabled = 0;
+	return saved_ftrace_enabled;
+#else
+	return 0;
+#endif
+}
+
+static inline void ftrace_enabled_restore(int enabled)
+{
+#ifdef CONFIG_FTRACE
+	ftrace_enabled = enabled;
+#endif
+}
+
 #ifdef CONFIG_FRAME_POINTER
 /* TODO: need to fix this for ARM */
 # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))



             reply	other threads:[~2008-08-08  6:52 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-08-08  6:52 Huang Ying [this message]
2008-08-08  6:52 ` [PATCH -v2 7/8] kexec jump: ftrace_enabled_save/restore Huang Ying
2008-08-08 14:17 ` Vivek Goyal
2008-08-08 14:17   ` Vivek Goyal
2008-08-08 14:30   ` Steven Rostedt
2008-08-08 14:30     ` Steven Rostedt
2008-08-11  1:22     ` Huang Ying
2008-08-11  1:22       ` Huang Ying
2008-08-11 12:29       ` Steven Rostedt
2008-08-11 12:29         ` Steven Rostedt
2008-08-11 13:51       ` Vivek Goyal
2008-08-11 13:51         ` Vivek Goyal
2008-08-12  1:22         ` Huang Ying
2008-08-12  1:22           ` Huang Ying

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