diff options
| author | Henrik Kretzschmar <henne@nachtwindheim.de> | 2011-02-22 15:38:05 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-02-23 11:38:45 +0100 |
| commit | 7167d08e780a722fa79ea414fc4e72bc00751392 (patch) | |
| tree | f6a103d7de511142c362bc216e886a4eb2ac69bc /arch/x86/kernel/smpboot.c | |
| parent | x86: Add dummy mp_save_irq() (diff) | |
| download | linux-7167d08e780a722fa79ea414fc4e72bc00751392.tar.xz linux-7167d08e780a722fa79ea414fc4e72bc00751392.zip | |
x86: Rework arch_disable_smp_support() for x86
Currently arch_disable_smp_support() on x86 disables only the
support for the IOAPIC and is also compiled in if SMP-support is
not.
Therefore this function is renamed to disable_ioapic_support(),
which meets its purpose and is only compiled in the kernel
when IOAPIC support is also.
A new arch_disable_smp_support() is created in smpboot.c,
which calls disable_ioapic_support() and gets only compiled
in the kernel when SMP support is also.
Signed-off-by: Henrik Kretzschmar <henne@nachtwindheim.de>
LKML-Reference: <1298385487-4708-3-git-send-email-henne@nachtwindheim.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/smpboot.c')
| -rw-r--r-- | arch/x86/kernel/smpboot.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 08776a953487..09d0172a0059 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -64,6 +64,7 @@ #include <asm/mtrr.h> #include <asm/mwait.h> #include <asm/apic.h> +#include <asm/io_apic.h> #include <asm/setup.h> #include <asm/uv/uv.h> #include <linux/mc146818rtc.h> @@ -945,6 +946,14 @@ int __cpuinit native_cpu_up(unsigned int cpu) return 0; } +/** + * arch_disable_smp_support() - disables SMP support for x86 at runtime + */ +void arch_disable_smp_support(void) +{ + disable_ioapic_support(); +} + /* * Fall back to non SMP mode after errors. * @@ -1045,7 +1054,7 @@ static int __init smp_sanity_check(unsigned max_cpus) "(tell your hw vendor)\n"); } smpboot_clear_io_apic(); - arch_disable_smp_support(); + disable_ioapic_support(); return -1; } |