Commit 980af75e authored by Daniel Lezcano's avatar Daniel Lezcano Committed by Zhang Rui
Browse files

thermal/drivers/core: Add init section table for self-encapsulation 



Currently the governors are declared in their respective files but they
export their [un]register functions which in turn call the [un]register
governors core's functions. That implies a cyclic dependency which is
not desirable. There is a way to self-encapsulate the governors by letting
them to declare themselves in a __init section table.

Define the table in the asm generic linker description like the other
tables and provide the specific macros to deal with.

Reviewed-by: default avatarAmit Kucheria <amit.kucheria@linaro.org>
Signed-off-by: default avatarDaniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: default avatarZhang Rui <rui.zhang@intel.com>
parent 4b972a01

drivers/thermal/thermal_core.h

+15 −0
Original line number Diff line number Diff line
@@ -15,6 +15,21 @@ 
/* Initial state of a cooling device during binding */

#define THERMAL_NO_TARGET -1UL



/* Init section thermal table */

extern struct thermal_governor *__governor_thermal_table[];

extern struct thermal_governor *__governor_thermal_table_end[];



#define THERMAL_TABLE_ENTRY(table, name)			\

	static typeof(name) *__thermal_table_entry_##name	\

	__used __section(__##table##_thermal_table) = &name



#define THERMAL_GOVERNOR_DECLARE(name)	THERMAL_TABLE_ENTRY(governor, name)



#define for_each_governor_table(__governor)		\

	for (__governor = __governor_thermal_table;	\

	     __governor < __governor_thermal_table_end;	\

	     __governor++)



/*

 * This structure is used to describe the behavior of

 * a certain cooling device on a certain trip point

include/asm-generic/vmlinux.lds.h

+11 −0
Original line number Diff line number Diff line
@@ -239,6 +239,16 @@ 
#define ACPI_PROBE_TABLE(name)

#endif



#ifdef CONFIG_THERMAL

#define THERMAL_TABLE(name)						\

	. = ALIGN(8);							\

	__##name##_thermal_table = .;					\

	KEEP(*(__##name##_thermal_table))				\

	__##name##_thermal_table_end = .;

#else

#define THERMAL_TABLE(name)

#endif



#define KERNEL_DTB()							\

	STRUCT_ALIGN();							\

	__dtb_start = .;						\
@@ -608,6 +618,7 @@ 
	IRQCHIP_OF_MATCH_TABLE()					\

	ACPI_PROBE_TABLE(irqchip)					\

	ACPI_PROBE_TABLE(timer)						\

	THERMAL_TABLE(governor)						\

	EARLYCON_TABLE()						\

	LSM_TABLE()

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