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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: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt 2011-04-12 19:06:39 -04:00 committed by Steven Rostedt
parent 85356f8022
commit f0201738b6
1 changed files with 7 additions and 7 deletions
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14
include/linux/init.h
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@ -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)