diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2020-05-21 16:51:42 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-05-27 16:40:27 +0200 |
| commit | 8539c5151a601593791bd35cf8c7f64a9dba5388 (patch) | |
| tree | 55930dc906bec3538873ce0896ab0eeee75fddd1 /include | |
| parent | 7653fbfc21fe095888b1eaf576019f4eac4ef47c (diff) | |
sched/fair, cpumask: Export for_each_cpu_wrap()
[ Upstream commit c743f0a5c50f2fcbc628526279cfa24f3dabe182 ]
More users for for_each_cpu_wrap() have appeared. Promote the construct
to generic cpumask interface.
The implementation is slightly modified to reduce arguments.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Lauro Ramos Venancio <lvenanci@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: lwang@redhat.com
Link: http://lkml.kernel.org/r/20170414122005.o35me2h5nowqkxbv@hirez.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
[dj: include only what's added to the cpumask interface, 4.4 doesn't
have them in the scheduler]
Signed-off-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/cpumask.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h index bb3a4bb35183..1322883e7b46 100644 --- a/include/linux/cpumask.h +++ b/include/linux/cpumask.h @@ -232,6 +232,23 @@ unsigned int cpumask_local_spread(unsigned int i, int node); (cpu) = cpumask_next_zero((cpu), (mask)), \ (cpu) < nr_cpu_ids;) +extern int cpumask_next_wrap(int n, const struct cpumask *mask, int start, bool wrap); + +/** + * for_each_cpu_wrap - iterate over every cpu in a mask, starting at a specified location + * @cpu: the (optionally unsigned) integer iterator + * @mask: the cpumask poiter + * @start: the start location + * + * The implementation does not assume any bit in @mask is set (including @start). + * + * After the loop, cpu is >= nr_cpu_ids. + */ +#define for_each_cpu_wrap(cpu, mask, start) \ + for ((cpu) = cpumask_next_wrap((start)-1, (mask), (start), false); \ + (cpu) < nr_cpumask_bits; \ + (cpu) = cpumask_next_wrap((cpu), (mask), (start), true)) + /** * for_each_cpu_and - iterate over every cpu in both masks * @cpu: the (optionally unsigned) integer iterator |