Commit 5c563ee9 authored by Yury Norov's avatar Yury Norov
Browse files

cpumask: introduce assign_cpu() macro 



Now that assign_bit() is a thin macro wrapper around set_bit() and
clear_bit(), we can use it in cpumask API and drop duplicating
implementations of set_cpu_xxx() helpers with no additional overhead.

Bloat-o-meter reports almost 2k less of generated code for allyesconfig,
mostly in kernel/cpu.c:
	add/remove: 2/4 grow/shrink: 3/4 up/down: 498/-2228 (-1730)

Reviewed-by: default avatarAlexander Lobakin <aleksander.lobakin@intel.com>
Signed-off-by: default avatarYury Norov <yury.norov@gmail.com>
parent 46d1907d

include/linux/cpumask.h

+6 −34
Original line number Diff line number Diff line
@@ -1083,44 +1083,16 @@ void init_cpu_present(const struct cpumask *src); 
void init_cpu_possible(const struct cpumask *src);

void init_cpu_online(const struct cpumask *src);



static inline void

set_cpu_possible(unsigned int cpu, bool possible)

{

	if (possible)

		cpumask_set_cpu(cpu, &__cpu_possible_mask);

	else

		cpumask_clear_cpu(cpu, &__cpu_possible_mask);

}

#define assign_cpu(cpu, mask, val)	\

	assign_bit(cpumask_check(cpu), cpumask_bits(mask), (val))



static inline void

set_cpu_present(unsigned int cpu, bool present)

{

	if (present)

		cpumask_set_cpu(cpu, &__cpu_present_mask);

	else

		cpumask_clear_cpu(cpu, &__cpu_present_mask);

}

#define set_cpu_possible(cpu, possible)	assign_cpu((cpu), &__cpu_possible_mask, (possible))

#define set_cpu_present(cpu, present)	assign_cpu((cpu), &__cpu_present_mask, (present))

#define set_cpu_active(cpu, active)	assign_cpu((cpu), &__cpu_active_mask, (active))

#define set_cpu_dying(cpu, dying)	assign_cpu((cpu), &__cpu_dying_mask, (dying))



void set_cpu_online(unsigned int cpu, bool online);



static inline void

set_cpu_active(unsigned int cpu, bool active)

{

	if (active)

		cpumask_set_cpu(cpu, &__cpu_active_mask);

	else

		cpumask_clear_cpu(cpu, &__cpu_active_mask);

}



static inline void

set_cpu_dying(unsigned int cpu, bool dying)

{

	if (dying)

		cpumask_set_cpu(cpu, &__cpu_dying_mask);

	else

		cpumask_clear_cpu(cpu, &__cpu_dying_mask);

}



/**

 * to_cpumask - convert a NR_CPUS bitmap to a struct cpumask *

 * @bitmap: the bitmap