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Subject[PATCH v2 1/2] cpumask: Add for_each_cpu_from()
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Add for_each_cpu_from() as a generic cpumask macro.

for_each_cpu_from() is the same as for_each_cpu(), except it starts at
@cpu instead of zero.

Signed-off-by: Kyle Meyer <kyle.meyer@hpe.com>
Acked-by: Yury Norov <yury.norov@gmail.com>
---
include/linux/cpumask.h | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
index 1c29947db848..d75060fbd058 100644
--- a/include/linux/cpumask.h
+++ b/include/linux/cpumask.h
@@ -368,6 +368,16 @@ unsigned int __pure cpumask_next_wrap(int n, const struct cpumask *mask, int sta
#define for_each_cpu_or(cpu, mask1, mask2) \
for_each_or_bit(cpu, cpumask_bits(mask1), cpumask_bits(mask2), small_cpumask_bits)

+/**
+ * for_each_cpu_from - iterate over CPUs present in @mask, from @cpu to the end of @mask.
+ * @cpu: the (optionally unsigned) integer iterator
+ * @mask: the cpumask pointer
+ *
+ * After the loop, cpu is >= nr_cpu_ids.
+ */
+#define for_each_cpu_from(cpu, mask) \
+ for_each_set_bit_from(cpu, cpumask_bits(mask), small_cpumask_bits)
+
/**
* cpumask_any_but - return a "random" in a cpumask, but not this one.
* @mask: the cpumask to search
--
2.44.0

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