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driver core: cpu: make cpu_subsys const

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Now that the driver core can properly handle constant struct bus_type,
move the cpu_subsys variable to be a constant structure as well, placing
it into read-only memory which can not be modified at runtime.

Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Link: https://lore.kernel.org/r/2024010548-crane-snooze-a871@gregkh
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2024-01-05 11:26:48 +01:00
parent 05d8f25586
commit 3a480d4bb5
2 changed files with 2 additions and 2 deletions
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2
drivers/base/cpu.c
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@ -366,7 +366,7 @@ static int cpu_uevent(const struct device *dev, struct kobj_uevent_env *env)
}
#endif
struct bus_type cpu_subsys = {
const struct bus_type cpu_subsys = {
.name = "cpu",
.dev_name = "cpu",
.match = cpu_subsys_match,

2
include/linux/cpu.h
View File

@ -128,7 +128,7 @@ static inline void cpu_maps_update_done(void)
static inline int add_cpu(unsigned int cpu) { return 0;}
#endif /* CONFIG_SMP */
extern struct bus_type cpu_subsys;
extern const struct bus_type cpu_subsys;
extern int lockdep_is_cpus_held(void);