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x86_issue_ipi: keep interrupt disabled while issuing IPI

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NAKAMURA Gou
2015-09-29 19:02:40 +09:00
parent a666b69c2c
commit 79266f6b97
1 changed files with 4 additions and 0 deletions
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4
arch/x86/kernel/cpu.c
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@ -818,8 +818,12 @@ static void wait_icr_idle(void)
void x86_issue_ipi(unsigned int apicid, unsigned int low) void x86_issue_ipi(unsigned int apicid, unsigned int low)
{ {
unsigned long flags;
flags = cpu_disable_interrupt_save();
wait_icr_idle(); wait_icr_idle();
lapic_icr_write(apicid << LAPIC_ICR_ID_SHIFT, low); lapic_icr_write(apicid << LAPIC_ICR_ID_SHIFT, low);
cpu_restore_interrupt(flags);
} }
static void outb(uint8_t v, uint16_t port) static void outb(uint8_t v, uint16_t port)