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cpumask: Introduce for_each_cpu_andnot()

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for_each_cpu_and() is very convenient as it saves having to allocate a
temporary cpumask to store the result of cpumask_and(). The same issue
applies to cpumask_andnot() which doesn't actually need temporary storage
for iteration purposes.

Following what has been done for for_each_cpu_and(), introduce
for_each_cpu_andnot().

Signed-off-by: Valentin Schneider <vschneid@redhat.com>
This commit is contained in:
Valentin Schneider
2022-10-03 16:34:18 +01:00
committed by Yury Norov
parent 90d482908e
commit 5f75ff295c
2 changed files with 23 additions and 0 deletions
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5
include/linux/find.h
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@@ -498,6 +498,11 @@ unsigned long find_next_bit_le(const void *addr, unsigned
(bit) = find_next_and_bit((addr1), (addr2), (size), (bit)), (bit) < (size);\
(bit)++)
#define for_each_andnot_bit(bit, addr1, addr2, size) \
for ((bit) = 0; \
(bit) = find_next_andnot_bit((addr1), (addr2), (size), (bit)), (bit) < (size);\
(bit)++)
/* same as for_each_set_bit() but use bit as value to start with */
#define for_each_set_bit_from(bit, addr, size) \
for (; (bit) = find_next_bit((addr), (size), (bit)), (bit) < (size); (bit)++)