From c22f8828806f08ae3adfab1968fc1eefdd52b7d1 Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@elte.hu>
Date: Wed, 12 Nov 2008 13:17:38 +0100
Subject: [PATCH] --- yaml --- r: 121101 b: refs/heads/master c:
 2b7d0390a6d6d595f43ea3806639664afe5b9ebe h: refs/heads/master i:   121099:
 483b37606847ce81e007a7ad8ad77772f3b8a28d v: v3

---
 [refs]                               | 2 +-
 trunk/arch/x86/kernel/vsyscall_64.c  | 9 ++-------
 trunk/arch/x86/vdso/vclock_gettime.c | 3 +++
 trunk/include/linux/compiler.h       | 6 +++++-
 4 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/[refs] b/[refs]
index 378f2bf979a0..6b9a2b1ee99c 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f88c4ae9f8c3939bee4337c75c7a673b5de7a8a7
+refs/heads/master: 2b7d0390a6d6d595f43ea3806639664afe5b9ebe
diff --git a/trunk/arch/x86/kernel/vsyscall_64.c b/trunk/arch/x86/kernel/vsyscall_64.c
index 2f90202e59b3..ece02932ea57 100644
--- a/trunk/arch/x86/kernel/vsyscall_64.c
+++ b/trunk/arch/x86/kernel/vsyscall_64.c
@@ -17,13 +17,8 @@
  *  want per guest time just set the kernel.vsyscall64 sysctl to 0.
  */
 
-/* Protect userspace from profiling */
-#ifdef CONFIG_TRACE_UNLIKELY_PROFILE
-# undef likely
-# undef unlikely
-# define likely(x)		likely_notrace(x)
-# define unlikely(x)		unlikely_notrace(x)
-#endif
+/* Disable profiling for userspace code: */
+#define DISABLE_UNLIKELY_PROFILE
 
 #include <linux/time.h>
 #include <linux/init.h>
diff --git a/trunk/arch/x86/vdso/vclock_gettime.c b/trunk/arch/x86/vdso/vclock_gettime.c
index 1ef0f90813d6..6e667631e7dc 100644
--- a/trunk/arch/x86/vdso/vclock_gettime.c
+++ b/trunk/arch/x86/vdso/vclock_gettime.c
@@ -9,6 +9,9 @@
  * Also alternative() doesn't work.
  */
 
+/* Disable profiling for userspace code: */
+#define DISABLE_UNLIKELY_PROFILE
+
 #include <linux/kernel.h>
 #include <linux/posix-timers.h>
 #include <linux/time.h>
diff --git a/trunk/include/linux/compiler.h b/trunk/include/linux/compiler.h
index 935e30cfaf3c..63b7d9089d6e 100644
--- a/trunk/include/linux/compiler.h
+++ b/trunk/include/linux/compiler.h
@@ -59,7 +59,11 @@ extern void __chk_io_ptr(const volatile void __iomem *);
  * specific implementations come from the above header files
  */
 
-#ifdef CONFIG_TRACE_UNLIKELY_PROFILE
+/*
+ * Note: DISABLE_UNLIKELY_PROFILE can be used by special lowlevel code
+ * to disable branch tracing on a per file basis.
+ */
+#if defined(CONFIG_TRACE_UNLIKELY_PROFILE) && !defined(DISABLE_UNLIKELY_PROFILE)
 struct ftrace_likely_data {
 	const char *func;
 	const char *file;