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cfb463b717
Introduce bitmap_intersects_and() to determine whether the intersection of three bitmaps is non-empty. Unlike cpumask_first_and_and(), this returns immediately when an intersecting word is found and does not calculate the first matching bit. Add cpumask_intersects_and() as the corresponding cpumask wrapper. A subsequent patch uses the helper to determine whether a task has a CPU that is present in its affinity mask, the preferred CPU mask, and task possible CPU mask. Suggested-by: Yury Norov <yury.norov@gmail.com> Signed-off-by: Shrikanth Hegde <sshegde@linux.ibm.com> Reviwed-by: Yury Norov <yury.norov@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Yury Norov <yury.norov@gmail.com> Link: https://patch.msgid.link/20260928053728.797539-3-sshegde@linux.ibm.com |
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