[tip: x86/mm] cpumask: Mark functions as pure

[tip-bot2 for Nadav Amit]

The following commit has been merged into the x86/mm branch of tip:

Commit-ID:     291c4011dd7ac0cd0cebb727a75ee5a50d16dcf7
Gitweb:        https://git.kernel.org/tip/291c4011dd7ac0cd0cebb727a75ee5a50d16dcf7
Author:        Nadav Amit <namit@xxxxxxxxxx>
AuthorDate:    Sat, 20 Feb 2021 15:17:10 -08:00
Committer:     Ingo Molnar <mingo@xxxxxxxxxx>
CommitterDate: Sat, 06 Mar 2021 12:59:10 +01:00

cpumask: Mark functions as pure

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: Nadav Amit <namit@xxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Reviewed-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20210220231712.2475218-8-namit@xxxxxxxxxx
---
 include/linux/cpumask.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
index 383684e..c53364c 100644
--- a/include/linux/cpumask.h
+++ b/include/linux/cpumask.h
@@ -235,7 +235,7 @@ 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
@@ -252,8 +252,8 @@ 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);