From: Yury Norov yury.norov@gmail.com
mainline inclusion from mainline-v6.1-rc1 commit 7102b3bb070fdf4580a05cbfc5ad3c0691dc4bf9 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/?i...
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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 --- include/linux/cpumask.h | 4 ---- 1 file changed, 4 deletions(-)
diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h index 7b3f83f452ec..192144b52b47 100644 --- a/include/linux/cpumask.h +++ b/include/linux/cpumask.h @@ -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.