Re: [PATCH 2/3] jump_label: Allow jump labels to be used in assembly

2015-04-09 Thread Steven Rostedt 
On Thu,  9 Apr 2015 13:51:31 +1000
Anton Blanchard  wrote:

> To use jump labels in assembly we need the HAVE_JUMP_LABEL define,
> so we select a fallback version if the toolchain does not support
> them.
> 
> Modify linux/jump_label.h so it can be included by assembly files.
> We also need to add -DCC_HAVE_ASM_GOTO to KBUILD_AFLAGS.
> 
> Signed-off-by: Anton Blanchard 

Acked-by: Steven Rostedt 

-- Steve
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Re: [PATCH 2/3] jump_label: Allow jump labels to be used in assembly

2015-04-09 Thread Peter Zijlstra 
On Thu, Apr 09, 2015 at 01:51:31PM +1000, Anton Blanchard wrote:
> To use jump labels in assembly we need the HAVE_JUMP_LABEL define,
> so we select a fallback version if the toolchain does not support
> them.
> 
> Modify linux/jump_label.h so it can be included by assembly files.
> We also need to add -DCC_HAVE_ASM_GOTO to KBUILD_AFLAGS.
> 
> Signed-off-by: Anton Blanchard 

Acked-by: Peter Zijlstra (Intel) 
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[PATCH 2/3] jump_label: Allow jump labels to be used in assembly

2015-04-08 Thread Anton Blanchard 
To use jump labels in assembly we need the HAVE_JUMP_LABEL define,
so we select a fallback version if the toolchain does not support
them.

Modify linux/jump_label.h so it can be included by assembly files.
We also need to add -DCC_HAVE_ASM_GOTO to KBUILD_AFLAGS.

Signed-off-by: Anton Blanchard 
---
 Makefile   |  1 +
 include/linux/jump_label.h | 21 +
 2 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/Makefile b/Makefile
index e734965..3624215 100644
--- a/Makefile
+++ b/Makefile
@@ -779,6 +779,7 @@ KBUILD_ARFLAGS := $(call ar-option,D)
 # check for 'asm goto'
 ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
+   KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO
 endif
 
 include $(srctree)/scripts/Makefile.kasan
diff --git a/include/linux/jump_label.h b/include/linux/jump_label.h
index 98f923b6..f4de473 100644
--- a/include/linux/jump_label.h
+++ b/include/linux/jump_label.h
@@ -45,6 +45,12 @@
  * same as using STATIC_KEY_INIT_FALSE.
  */
 
+#if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_JUMP_LABEL)
+# define HAVE_JUMP_LABEL
+#endif
+
+#ifndef __ASSEMBLY__
+
 #include 
 #include 
 #include 
@@ -55,7 +61,7 @@ extern bool static_key_initialized;
"%s used before call to jump_label_init", \
__func__)
 
-#if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_JUMP_LABEL)
+#ifdef HAVE_JUMP_LABEL
 
 struct static_key {
atomic_t enabled;
@@ -66,13 +72,18 @@ struct static_key {
 #endif
 };
 
-# include 
-# define HAVE_JUMP_LABEL
 #else
 struct static_key {
atomic_t enabled;
 };
-#endif /* CC_HAVE_ASM_GOTO && CONFIG_JUMP_LABEL */
+#endif /* HAVE_JUMP_LABEL */
+#endif /* __ASSEMBLY__ */
+
+#ifdef HAVE_JUMP_LABEL
+#include 
+#endif
+
+#ifndef __ASSEMBLY__
 
 enum jump_label_type {
JUMP_LABEL_DISABLE = 0,
@@ -203,3 +214,5 @@ static inline bool static_key_enabled(struct static_key 
*key)
 }
 
 #endif /* _LINUX_JUMP_LABEL_H */
+
+#endif /* __ASSEMBLY__ */
-- 
2.1.0

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[PATCH 2/3] jump_label: Allow jump labels to be used in assembly

2015-01-07 Thread Anton Blanchard 
To use jump labels in assembly we need the HAVE_JUMP_LABEL define,
so we select a fallback version if the toolchain does not support
them.

Modify linux/jump_label.h so it can be included by assembly files.
We also need to add -DCC_HAVE_ASM_GOTO to KBUILD_AFLAGS.

Signed-off-by: Anton Blanchard 
---
 Makefile   |  1 +
 include/linux/jump_label.h | 21 +
 2 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/Makefile b/Makefile
index ef748e1..7b83c3f 100644
--- a/Makefile
+++ b/Makefile
@@ -774,6 +774,7 @@ KBUILD_ARFLAGS := $(call ar-option,D)
 # check for 'asm goto'
 ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
+   KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO
 endif
 
 include $(srctree)/scripts/Makefile.extrawarn
diff --git a/include/linux/jump_label.h b/include/linux/jump_label.h
index 98f923b6..f4de473 100644
--- a/include/linux/jump_label.h
+++ b/include/linux/jump_label.h
@@ -45,6 +45,12 @@
  * same as using STATIC_KEY_INIT_FALSE.
  */
 
+#if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_JUMP_LABEL)
+# define HAVE_JUMP_LABEL
+#endif
+
+#ifndef __ASSEMBLY__
+
 #include 
 #include 
 #include 
@@ -55,7 +61,7 @@ extern bool static_key_initialized;
"%s used before call to jump_label_init", \
__func__)
 
-#if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_JUMP_LABEL)
+#ifdef HAVE_JUMP_LABEL
 
 struct static_key {
atomic_t enabled;
@@ -66,13 +72,18 @@ struct static_key {
 #endif
 };
 
-# include 
-# define HAVE_JUMP_LABEL
 #else
 struct static_key {
atomic_t enabled;
 };
-#endif /* CC_HAVE_ASM_GOTO && CONFIG_JUMP_LABEL */
+#endif /* HAVE_JUMP_LABEL */
+#endif /* __ASSEMBLY__ */
+
+#ifdef HAVE_JUMP_LABEL
+#include 
+#endif
+
+#ifndef __ASSEMBLY__
 
 enum jump_label_type {
JUMP_LABEL_DISABLE = 0,
@@ -203,3 +214,5 @@ static inline bool static_key_enabled(struct static_key 
*key)
 }
 
 #endif /* _LINUX_JUMP_LABEL_H */
+
+#endif /* __ASSEMBLY__ */
-- 
2.1.0

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