diff options
Diffstat (limited to 'arch/x86/include/asm/smpboot_hooks.h')
| -rw-r--r-- | arch/x86/include/asm/smpboot_hooks.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/include/asm/smpboot_hooks.h b/arch/x86/include/asm/smpboot_hooks.h index 725b7783199..49adfd7bb4a 100644 --- a/arch/x86/include/asm/smpboot_hooks.h +++ b/arch/x86/include/asm/smpboot_hooks.h @@ -10,7 +10,11 @@ static inline void smpboot_clear_io_apic_irqs(void) static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip) { + unsigned long flags; + + spin_lock_irqsave(&rtc_lock, flags); CMOS_WRITE(0xa, 0xf); + spin_unlock_irqrestore(&rtc_lock, flags); local_flush_tlb(); pr_debug("1.\n"); *((volatile unsigned short *)phys_to_virt(apic->trampoline_phys_high)) = @@ -23,6 +27,8 @@ static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip) static inline void smpboot_restore_warm_reset_vector(void) { + unsigned long flags; + /* * Install writable page 0 entry to set BIOS data area. */ @@ -32,7 +38,9 @@ static inline void smpboot_restore_warm_reset_vector(void) * Paranoid: Set warm reset code and vector here back * to default values. */ + spin_lock_irqsave(&rtc_lock, flags); CMOS_WRITE(0, 0xf); + spin_unlock_irqrestore(&rtc_lock, flags); *((volatile u32 *)phys_to_virt(apic->trampoline_phys_low)) = 0; } |