Remove apic_write_around from smpboot.c We don't do workarounds for ancient hardware bugs. Signed-off-by: Andi Kleen Index: linux/arch/x86_64/kernel/smpboot.c =================================================================== --- linux.orig/arch/x86_64/kernel/smpboot.c +++ linux/arch/x86_64/kernel/smpboot.c @@ -540,8 +540,8 @@ static void inquire_remote_apic(int apic */ apic_wait_icr_idle(); - apic_write_around(APIC_ICR2, SET_APIC_DEST_FIELD(apicid)); - apic_write_around(APIC_ICR, APIC_DM_REMRD | regs[i]); + apic_write(APIC_ICR2, SET_APIC_DEST_FIELD(apicid)); + apic_write(APIC_ICR, APIC_DM_REMRD | regs[i]); timeout = 0; do { @@ -574,12 +574,12 @@ static int __cpuinit wakeup_secondary_vi /* * Turn INIT on target chip */ - apic_write_around(APIC_ICR2, SET_APIC_DEST_FIELD(phys_apicid)); + apic_write(APIC_ICR2, SET_APIC_DEST_FIELD(phys_apicid)); /* * Send IPI */ - apic_write_around(APIC_ICR, APIC_INT_LEVELTRIG | APIC_INT_ASSERT + apic_write(APIC_ICR, APIC_INT_LEVELTRIG | APIC_INT_ASSERT | APIC_DM_INIT); Dprintk("Waiting for send to finish...\n"); @@ -595,10 +595,10 @@ static int __cpuinit wakeup_secondary_vi Dprintk("Deasserting INIT.\n"); /* Target chip */ - apic_write_around(APIC_ICR2, SET_APIC_DEST_FIELD(phys_apicid)); + apic_write(APIC_ICR2, SET_APIC_DEST_FIELD(phys_apicid)); /* Send IPI */ - apic_write_around(APIC_ICR, APIC_INT_LEVELTRIG | APIC_DM_INIT); + apic_write(APIC_ICR, APIC_INT_LEVELTRIG | APIC_DM_INIT); Dprintk("Waiting for send to finish...\n"); timeout = 0; @@ -640,12 +640,11 @@ static int __cpuinit wakeup_secondary_vi */ /* Target chip */ - apic_write_around(APIC_ICR2, SET_APIC_DEST_FIELD(phys_apicid)); + apic_write(APIC_ICR2, SET_APIC_DEST_FIELD(phys_apicid)); /* Boot on the stack */ /* Kick the second */ - apic_write_around(APIC_ICR, APIC_DM_STARTUP - | (start_rip >> 12)); + apic_write(APIC_ICR, APIC_DM_STARTUP | (start_rip >> 12)); /* * Give the other CPU some time to accept the IPI.