Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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: Alexander Lobakin <aleksander.lobakin@intel.com>
Signed-off-by: Yury Norov <yury.norov@gmail.com>
+6
-34
+6
-34
include/linux/cpumask.h
+6
-34
include/linux/cpumask.h
···
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void init_cpu_possible(const struct cpumask *src);
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void init_cpu_online(const struct cpumask *src);
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static inline void
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set_cpu_possible(unsigned int cpu, bool possible)
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-
{
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if (possible)
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cpumask_set_cpu(cpu, &__cpu_possible_mask);
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else
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cpumask_clear_cpu(cpu, &__cpu_possible_mask);
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}
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+
#define assign_cpu(cpu, mask, val) \
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assign_bit(cpumask_check(cpu), cpumask_bits(mask), (val))
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static inline void
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set_cpu_present(unsigned int cpu, bool present)
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{
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if (present)
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cpumask_set_cpu(cpu, &__cpu_present_mask);
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else
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cpumask_clear_cpu(cpu, &__cpu_present_mask);
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-
}
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#define set_cpu_possible(cpu, possible) assign_cpu((cpu), &__cpu_possible_mask, (possible))
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#define set_cpu_present(cpu, present) assign_cpu((cpu), &__cpu_present_mask, (present))
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#define set_cpu_active(cpu, active) assign_cpu((cpu), &__cpu_active_mask, (active))
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#define set_cpu_dying(cpu, dying) assign_cpu((cpu), &__cpu_dying_mask, (dying))
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void set_cpu_online(unsigned int cpu, bool online);
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-
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static inline void
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set_cpu_active(unsigned int cpu, bool active)
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{
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if (active)
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cpumask_set_cpu(cpu, &__cpu_active_mask);
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else
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cpumask_clear_cpu(cpu, &__cpu_active_mask);
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}
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-
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static inline void
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set_cpu_dying(unsigned int cpu, bool dying)
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{
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if (dying)
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cpumask_set_cpu(cpu, &__cpu_dying_mask);
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else
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cpumask_clear_cpu(cpu, &__cpu_dying_mask);
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-
}
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/**
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* to_cpumask - convert a NR_CPUS bitmap to a struct cpumask *