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x86: introduce smpboot_clear_io_apic 

x86_64 has two nr_ioapics = 0 statements. In 32-bit, it can be done
too. We do it through the smpboot_clear_io_apic() inline function,
to cope with subarchitectures (visws) that does not compile mpparse in

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Glauber de Oliveira Costa 2008-03-19 14:26:10 -03:00 committed by Ingo Molnar
parent 771263d311
commit 9f3734f631
4 changed files with 13 additions and 2 deletions
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2
arch/x86/kernel/smpboot_32.c
View File

@ -155,6 +155,7 @@ static int __init smp_sanity_check(unsigned max_cpus)
printk(KERN_ERR "BIOS bug, local APIC #%d not detected!...\n",
boot_cpu_physical_apicid);
printk(KERN_ERR "... forcing use of dummy APIC emulation. (tell your hw vendor)\n");
smpboot_clear_io_apic();
return -1;
}
@ -173,6 +174,7 @@ static int __init smp_sanity_check(unsigned max_cpus)
setup_local_APIC();
end_local_APIC_setup();
}
smpboot_clear_io_apic();
return -1;
}
return 0;

4
arch/x86/kernel/smpboot_64.c
View File

@ -134,7 +134,7 @@ static int __init smp_sanity_check(unsigned max_cpus)
printk(KERN_ERR "BIOS bug, local APIC #%d not detected!...\n",
boot_cpu_physical_apicid);
printk(KERN_ERR "... forcing use of dummy APIC emulation. (tell your hw vendor)\n");
nr_ioapics = 0;
smpboot_clear_io_apic();
return -1;
}
@ -145,7 +145,7 @@ static int __init smp_sanity_check(unsigned max_cpus)
*/
if (!max_cpus) {
printk(KERN_INFO "SMP mode deactivated, forcing use of dummy APIC emulation.\n");
nr_ioapics = 0;
smpboot_clear_io_apic();
return -1;
}

5
include/asm-x86/mach-default/smpboot_hooks.h
View File

@ -44,3 +44,8 @@ static inline void smpboot_setup_io_apic(void)
else
nr_ioapics = 0;
}
static inline void smpboot_clear_io_apic(void)
{
nr_ioapics = 0;
}

4
include/asm-x86/mach-visws/smpboot_hooks.h
View File

@ -22,3 +22,7 @@ static inline void smpboot_restore_warm_reset_vector(void)
static inline void smpboot_setup_io_apic(void)
{
}
static inline void smpboot_clear_io_apic(void)
{
}