[tip: x86/apic] x86/apic: Mop up early_per_cpu() abuse

[tip-bot2 for Thomas Gleixner]

The following commit has been merged into the x86/apic branch of tip:

Commit-ID:     e3243ed0142bb438bbd284c8c04f4c8e0c2ff498
Gitweb:        https://git.kernel.org/tip/e3243ed0142bb438bbd284c8c04f4c8e0c2ff498
Author:        Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate:    Tue, 08 Aug 2023 15:03:54 -07:00
Committer:     Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
CommitterDate: Wed, 09 Aug 2023 11:58:24 -07:00

x86/apic: Mop up early_per_cpu() abuse

UV X2APIC uses the per CPU variable from:

  native_smp_prepare_cpus()
    uv_system_init()
      uv_system_init_hub()

which is long after the per CPU areas have been set up.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Tested-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>
Tested-by: Sohil Mehta <sohil.mehta@xxxxxxxxx>
Tested-by: Juergen Gross <jgross@xxxxxxxx> # Xen PV (dom0 and unpriv. guest)
---
 arch/x86/kernel/apic/x2apic_uv_x.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 0d812fd..8b14451 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -1843,7 +1843,7 @@ static void __init uv_system_init_hub(void)
 
 	/* Initialize per CPU info: */
 	for_each_possible_cpu(cpu) {
-		int apicid = early_per_cpu(x86_cpu_to_apicid, cpu);
+		int apicid = per_cpu(x86_cpu_to_apicid, cpu);
 		unsigned short bid;
 		unsigned short pnode;