Commit f0201738 authored by Steven Rostedt's avatar Steven Rostedt Committed by Steven Rostedt
Browse files

ftrace: Avoid recording mcount on .init sections directly 

The init and exit sections should not be traced and adding a call to
mcount to them is a waste of text and instruction cache. Have the
macro section attributes include notrace to ignore these functions
for tracing from the build.

Link: http://lkml.kernel.org/r/20110421023738.953028219@goodmis.org


Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent 85356f80

include/linux/init.h

+7 −7
Original line number Diff line number Diff line
@@ -79,29 +79,29 @@ 
#define __exitused  __used

#endif



#define __exit          __section(.exit.text) __exitused __cold

#define __exit          __section(.exit.text) __exitused __cold notrace



/* Used for HOTPLUG */

#define __devinit        __section(.devinit.text) __cold

#define __devinit        __section(.devinit.text) __cold notrace

#define __devinitdata    __section(.devinit.data)

#define __devinitconst   __section(.devinit.rodata)

#define __devexit        __section(.devexit.text) __exitused __cold

#define __devexit        __section(.devexit.text) __exitused __cold notrace

#define __devexitdata    __section(.devexit.data)

#define __devexitconst   __section(.devexit.rodata)



/* Used for HOTPLUG_CPU */

#define __cpuinit        __section(.cpuinit.text) __cold

#define __cpuinit        __section(.cpuinit.text) __cold notrace

#define __cpuinitdata    __section(.cpuinit.data)

#define __cpuinitconst   __section(.cpuinit.rodata)

#define __cpuexit        __section(.cpuexit.text) __exitused __cold

#define __cpuexit        __section(.cpuexit.text) __exitused __cold notrace

#define __cpuexitdata    __section(.cpuexit.data)

#define __cpuexitconst   __section(.cpuexit.rodata)



/* Used for MEMORY_HOTPLUG */

#define __meminit        __section(.meminit.text) __cold

#define __meminit        __section(.meminit.text) __cold notrace

#define __meminitdata    __section(.meminit.data)

#define __meminitconst   __section(.meminit.rodata)

#define __memexit        __section(.memexit.text) __exitused __cold

#define __memexit        __section(.memexit.text) __exitused __cold notrace

#define __memexitdata    __section(.memexit.data)

#define __memexitconst   __section(.memexit.rodata)

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