3.16.78-rc1 review patch. If anyone has any objections, please let me know.
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From: Dou Liyang douly.fnst@cn.fujitsu.com
commit 8f1561680f42a5491b371b513f1ab8197f31fd62 upstream.
The logical_smp_processor_id() inline which is only called in setup_local_APIC() on x86_32 systems has no real value.
Drop it and directly use GET_APIC_LOGICAL_ID() at the call site and use a more suitable variable name for readability
Signed-off-by: Dou Liyang douly.fnst@cn.fujitsu.com Signed-off-by: Thomas Gleixner tglx@linutronix.de Cc: andy.shevchenko@gmail.com Cc: bhe@redhat.com Cc: ebiederm@xmission.com Link: https://lkml.kernel.org/r/20180301055930.2396-4-douly.fnst@cn.fujitsu.com [bwh: Backported to 3.16: adjust context] Signed-off-by: Ben Hutchings ben@decadent.org.uk --- --- a/arch/x86/include/asm/smp.h +++ b/arch/x86/include/asm/smp.h @@ -203,16 +203,6 @@ extern int safe_smp_processor_id(void); #endif
#ifdef CONFIG_X86_LOCAL_APIC - -#ifndef CONFIG_X86_64 -static inline int logical_smp_processor_id(void) -{ - /* we don't want to mark this access volatile - bad code generation */ - return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR)); -} - -#endif - extern int hard_smp_processor_id(void);
#else /* CONFIG_X86_LOCAL_APIC */ --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -1305,6 +1305,9 @@ void setup_local_APIC(void) int i, j, acked = 0; unsigned long long tsc = 0, ntsc; long long max_loops = cpu_khz ? cpu_khz : 1000000; +#ifdef CONFIG_X86_32 + int logical_apicid, ldr_apicid; +#endif
if (cpu_has_tsc) rdtscll(tsc); @@ -1344,11 +1347,11 @@ void setup_local_APIC(void) * initialized during get_smp_config(), make sure it matches the * actual value. */ - i = early_per_cpu(x86_cpu_to_logical_apicid, cpu); - WARN_ON(i != BAD_APICID && i != logical_smp_processor_id()); + logical_apicid = early_per_cpu(x86_cpu_to_logical_apicid, cpu); + ldr_apicid = GET_APIC_LOGICAL_ID(apic_read(APIC_LDR)); + WARN_ON(logical_apicid != BAD_APICID && logical_apicid != ldr_apicid); /* always use the value from LDR */ - early_per_cpu(x86_cpu_to_logical_apicid, cpu) = - logical_smp_processor_id(); + early_per_cpu(x86_cpu_to_logical_apicid, cpu) = ldr_apicid;
/* * Some NUMA implementations (NUMAQ) don't initialize apicid to