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authorLinus Torvalds <torvalds@linux-foundation.org>2021-11-14 18:39:03 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2021-11-14 18:39:03 +0100
commitfc661f2dcb7e41dcda9ae862efb822bb2f461646 (patch)
tree2aae84cc82d8c0e2b390d313ea36c2550327da49 /arch/x86/kernel/smpboot.c
parentMerge tag 'perf_urgent_for_v5.16_rc1' of git://git.kernel.org/pub/scm/linux/k... (diff)
parentpreempt: Restore preemption model selection configs (diff)
downloadlinux-fc661f2dcb7e41dcda9ae862efb822bb2f461646.tar.xz
linux-fc661f2dcb7e41dcda9ae862efb822bb2f461646.zip
Merge tag 'sched_urgent_for_v5.16_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Borislav Petkov: - Avoid touching ~100 config files in order to be able to select the preemption model - clear cluster CPU masks too, on the CPU unplug path - prevent use-after-free in cfs - Prevent a race condition when updating CPU cache domains - Factor out common shared part of smp_prepare_cpus() into a common helper which can be called by both baremetal and Xen, in order to fix a booting of Xen PV guests * tag 'sched_urgent_for_v5.16_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: preempt: Restore preemption model selection configs arch_topology: Fix missing clear cluster_cpumask in remove_cpu_topology() sched/fair: Prevent dead task groups from regaining cfs_rq's sched/core: Mitigate race cpus_share_cache()/update_top_cache_domain() x86/smp: Factor out parts of native_smp_prepare_cpus()
Diffstat (limited to 'arch/x86/kernel/smpboot.c')
-rw-r--r--arch/x86/kernel/smpboot.c18
1 files changed, 12 insertions, 6 deletions
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 8241927addff..ac2909f0cab3 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1350,12 +1350,7 @@ static void __init smp_get_logical_apicid(void)
cpu0_logical_apicid = GET_APIC_LOGICAL_ID(apic_read(APIC_LDR));
}
-/*
- * Prepare for SMP bootup.
- * @max_cpus: configured maximum number of CPUs, It is a legacy parameter
- * for common interface support.
- */
-void __init native_smp_prepare_cpus(unsigned int max_cpus)
+void __init smp_prepare_cpus_common(void)
{
unsigned int i;
@@ -1386,6 +1381,17 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus)
set_sched_topology(x86_topology);
set_cpu_sibling_map(0);
+}
+
+/*
+ * Prepare for SMP bootup.
+ * @max_cpus: configured maximum number of CPUs, It is a legacy parameter
+ * for common interface support.
+ */
+void __init native_smp_prepare_cpus(unsigned int max_cpus)
+{
+ smp_prepare_cpus_common();
+
init_freq_invariance(false, false);
smp_sanity_check();