Commit cbb279a5 authored by Nadav Amit's avatar Nadav Amit Committed by Zheng Zengkai
Browse files

cpumask: Mark functions as pure 

mainline inclusion
from mainline-v5.13-rc1
commit 291c4011
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I3ZV2C


CVE: NA

-------------------------------------------------

cpumask_next_and() and cpumask_any_but() are pure, and marking them as
such seems to generate different and presumably better code for
native_flush_tlb_multi().

Signed-off-by: default avatarNadav Amit <namit@vmware.com>
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
Reviewed-by: default avatarDave Hansen <dave.hansen@linux.intel.com>
Link: https://lore.kernel.org/r/20210220231712.2475218-8-namit@vmware.com


Signed-off-by: default avatarTong Tiangen <tongtiangen@huawei.com>
Reviewed-by: default avatarChen Wandun <chenwandun@huawei.com>
Signed-off-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
parent ee525ce3

include/linux/cpumask.h

+3 −3
Original line number Diff line number Diff line
@@ -230,7 +230,7 @@ static inline unsigned int cpumask_last(const struct cpumask *srcp) 
	return find_last_bit(cpumask_bits(srcp), nr_cpumask_bits);

}



unsigned int cpumask_next(int n, const struct cpumask *srcp);

unsigned int __pure cpumask_next(int n, const struct cpumask *srcp);



/**

 * cpumask_next_zero - get the next unset cpu in a cpumask
@@ -247,8 +247,8 @@ static inline unsigned int cpumask_next_zero(int n, const struct cpumask *srcp) 
	return find_next_zero_bit(cpumask_bits(srcp), nr_cpumask_bits, n+1);

}



int cpumask_next_and(int n, const struct cpumask *, const struct cpumask *);

int cpumask_any_but(const struct cpumask *mask, unsigned int cpu);

int __pure cpumask_next_and(int n, const struct cpumask *, const struct cpumask *);

int __pure cpumask_any_but(const struct cpumask *mask, unsigned int cpu);

unsigned int cpumask_local_spread(unsigned int i, int node);

int cpumask_any_and_distribute(const struct cpumask *src1p,

			       const struct cpumask *src2p);