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| author | Daniel Lezcano | 2019-06-12 22:13:24 +0200 |
|---|---|---|
| committer | Zhang Rui | 2019-06-27 15:22:13 +0200 |
| commit | 980af75ede4f36107b98aa5c247359b87c6afc30 (patch) | |
| tree | b89606fef59a940be991d4ddea6c5810cd97c9d3 | |
| parent | Linux 5.2-rc6 (diff) | |
| download | kernel-qcow2-linux-980af75ede4f36107b98aa5c247359b87c6afc30.tar.gz kernel-qcow2-linux-980af75ede4f36107b98aa5c247359b87c6afc30.tar.xz kernel-qcow2-linux-980af75ede4f36107b98aa5c247359b87c6afc30.zip | |
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: Amit Kucheria <amit.kucheria@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
| -rw-r--r-- | drivers/thermal/thermal_core.h | 15 | ||||
| -rw-r--r-- | include/asm-generic/vmlinux.lds.h | 11 |
2 files changed, 26 insertions, 0 deletions
diff --git a/drivers/thermal/thermal_core.h b/drivers/thermal/thermal_core.h index 0df190ed82a7..06778cec8416 100644 --- a/drivers/thermal/thermal_core.h +++ b/drivers/thermal/thermal_core.h @@ -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 diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index 088987e9a3ea..5a06822fcd6c 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -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() |