Commit f3fe866d authored by Sam Ravnborg's avatar Sam Ravnborg
Browse files

compiler.h: introduce __section() 



Add a new helper: __section() that makes a section definition
much shorter and more readable.

Signed-off-by: default avatarSam Ravnborg <sam@ravnborg.org>
parent 01ba2bdc

include/linux/compiler.h

+5 −0
Original line number Diff line number Diff line
@@ -175,4 +175,9 @@ extern void __chk_io_ptr(const volatile void __iomem *); 
#define __cold

#endif



/* Simple shorthand for a section definition */

#ifndef __section

# define __section(S) __attribute__ ((__section__(#S)))

#endif



#endif /* __LINUX_COMPILER_H */

include/linux/init.h

+13 −13
Original line number Diff line number Diff line
@@ -40,10 +40,10 @@ 


/* These are for everybody (although not all archs will actually

   discard it in modules) */

#define __init		__attribute__ ((__section__ (".init.text"))) __cold

#define __initdata	__attribute__ ((__section__ (".init.data")))

#define __exitdata	__attribute__ ((__section__(".exit.data")))

#define __exit_call	__attribute_used__ __attribute__ ((__section__ (".exitcall.exit")))

#define __init		__section(.init.text) __cold

#define __initdata	__section(.init.data)

#define __exitdata	__section(.exit.data)

#define __exit_call	__attribute_used__ __section(.exitcall.exit)



/* modpost check for section mismatches during the kernel build.

 * A section mismatch happens when there are references from a
@@ -55,14 +55,14 @@ 
 * the init/exit section (code or data) is valid and will teach modpost

 * not to issue a warning.

 * The markers follow same syntax rules as __init / __initdata. */

#define __init_refok     noinline __attribute__ ((__section__ (".text.init.refok")))

#define __initdata_refok          __attribute__ ((__section__ (".data.init.refok")))

#define __exit_refok     noinline __attribute__ ((__section__ (".exit.text.refok")))

#define __init_refok     noinline __section(.text.init.refok)

#define __initdata_refok          __section(.data.init.refok)

#define __exit_refok     noinline __section(.exit.text.refok)



#ifdef MODULE

#define __exit		__attribute__ ((__section__(".exit.text"))) __cold

#define __exit		__section(.exit.text) __cold

#else

#define __exit		__attribute_used__ __attribute__ ((__section__(".exit.text"))) __cold

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

#endif



/* For assembly routines */
@@ -142,11 +142,11 @@ void prepare_namespace(void); 


#define console_initcall(fn) \

	static initcall_t __initcall_##fn \

	__attribute_used__ __attribute__((__section__(".con_initcall.init")))=fn

	__attribute_used__ __section(.con_initcall.init)=fn



#define security_initcall(fn) \

	static initcall_t __initcall_##fn \

	__attribute_used__ __attribute__((__section__(".security_initcall.init"))) = fn

	__attribute_used__ __section(.security_initcall.init) = fn



struct obs_kernel_param {

	const char *str;
@@ -164,7 +164,7 @@ struct obs_kernel_param { 
	static char __setup_str_##unique_id[] __initdata __aligned(1) = str; \

	static struct obs_kernel_param __setup_##unique_id	\

		__attribute_used__				\

		__attribute__((__section__(".init.setup")))	\

		__section(.init.setup)				\

		__attribute__((aligned((sizeof(long)))))	\

		= { __setup_str_##unique_id, fn, early }
@@ -242,7 +242,7 @@ void __init parse_early_param(void); 
#endif



/* Data marked not to be saved by software suspend */

#define __nosavedata __attribute__ ((__section__ (".data.nosave")))

#define __nosavedata __section(.data.nosave)



/* This means "can be init if no module support, otherwise module load

   may call it." */