Commit 7a371237 authored Dec 13, 2023 by Yury Norov Committed by Lu Jialin Dec 13, 2023

lib/cpumask: delete misleading comment

mainline inclusion
from mainline-v6.1-rc1
commit 7102b3bb
category: cleanup
bugzilla: https://gitee.com/openeuler/kernel/issues/I8KQBZ
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7102b3bb070fdf4580a05cbfc5ad3c0691dc4bf9



--------------------------------

The comment says that HOTPLUG config option enables all cpus in
cpu_possible_mask up to NR_CPUs. This is wrong. Even if HOTPLUG is
enabled, the mask is populated on boot with respect to ACPI/DT records.

Signed-off-by: Yury Norov <yury.norov@gmail.com>
Signed-off-by: Zheng Zucheng <zhengzucheng@huawei.com>

parent ad2143d4

include/linux/cpumask.h

+0 −4

Original line number	Diff line number	Diff line
		@@ -70,10 +70,6 @@ static inline void set_nr_cpu_ids(unsigned int nr)
		* cpu_online_mask is the dynamic subset of cpu_present_mask,
		* indicating those CPUs available for scheduling.
		*
		* If HOTPLUG is enabled, then cpu_possible_mask is forced to have
		* all NR_CPUS bits set, otherwise it is just the set of CPUs that
		* ACPI reports present at boot.
		*
		* If HOTPLUG is enabled, then cpu_present_mask varies dynamically,
		* depending on what ACPI reports as currently plugged in, otherwise
		* cpu_present_mask is just a copy of cpu_possible_mask.