897fa2c38c
In some cases, it's useful to be able to select a random cpu from the intersection of two masks, excluding a particular CPU. For example, in some systems an uncore PMU is shared by a subset of CPUs, and management of this PMU is assigned to some arbitrary CPU in this set. Whenever the management CPU is hotplugged out, we wish to migrate responsibility to another arbitrary CPU which is both in this set and online. Today we can use cpumask_any_and() to select an arbitrary CPU in the intersection of two masks. We can also use cpumask_any_but() to select any arbitrary cpu in a mask excluding, a particular CPU. To do both, we either need to use a temporary cpumask, which is wasteful, or use some lower-level cpumask helpers, which can be unclear. This patch adds a new cpumask_any_and_but() to cater for these cases. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: linux-kernel@vger.kernel.org Signed-off-by: Dawei Li <dawei.li@shingroup.cn> Acked-by: Yury Norov <yury.norov@gmail.com> Link: https://lore.kernel.org/r/20240403155950.2068109-2-dawei.li@shingroup.cn Signed-off-by: Will Deacon <will@kernel.org> |
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| .. | ||
| acpi | ||
| asm-generic | ||
| clocksource | ||
| crypto | ||
| drm | ||
| dt-bindings | ||
| keys | ||
| kunit | ||
| kvm | ||
| linux | ||
| math-emu | ||
| media | ||
| memory | ||
| misc | ||
| net | ||
| pcmcia | ||
| ras | ||
| rdma | ||
| rv | ||
| scsi | ||
| soc | ||
| sound | ||
| target | ||
| trace | ||
| uapi | ||
| ufs | ||
| vdso | ||
| video | ||
| xen | ||