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[PATCH] x86-64: Remove obsolete APIC "write around" bug workaround 

No x86-64 chipset has this bug

Generated code doesn't change because it was always disabled.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andi Kleen 2005-09-12 18:49:23 +02:00 committed by Linus Torvalds
parent c1507eb2ee
commit eddfb4ed29
3 changed files with 9 additions and 9 deletions
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4
arch/x86_64/kernel/genapic_cluster.c
View File

@ -51,10 +51,10 @@ static void cluster_init_apic_ldr(void)
count = 3;
id = my_cluster | (1UL << count);
x86_cpu_to_log_apicid[smp_processor_id()] = id;
apic_write_around(APIC_DFR, APIC_DFR_CLUSTER);
apic_write(APIC_DFR, APIC_DFR_CLUSTER);
val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
val |= SET_APIC_LOGICAL_ID(id);
apic_write_around(APIC_LDR, val);
apic_write(APIC_LDR, val);
}
/* Start with all IRQs pointing to boot CPU. IRQ balancing will shift them. */

8
arch/x86_64/kernel/genapic_flat.c
View File

@ -38,10 +38,10 @@ static void flat_init_apic_ldr(void)
num = smp_processor_id();
id = 1UL << num;
x86_cpu_to_log_apicid[num] = id;
apic_write_around(APIC_DFR, APIC_DFR_FLAT);
apic_write(APIC_DFR, APIC_DFR_FLAT);
val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
val |= SET_APIC_LOGICAL_ID(id);
apic_write_around(APIC_LDR, val);
apic_write(APIC_LDR, val);
}
static void flat_send_IPI_mask(cpumask_t cpumask, int vector)
@ -62,7 +62,7 @@ static void flat_send_IPI_mask(cpumask_t cpumask, int vector)
* prepare target chip field
*/
cfg = __prepare_ICR2(mask);
apic_write_around(APIC_ICR2, cfg);
apic_write(APIC_ICR2, cfg);
/*
* program the ICR
@ -72,7 +72,7 @@ static void flat_send_IPI_mask(cpumask_t cpumask, int vector)
/*
* Send the IPI. The write to APIC_ICR fires this off.
*/
apic_write_around(APIC_ICR, cfg);
apic_write(APIC_ICR, cfg);
local_irq_restore(flags);
}

6
include/asm-x86_64/ipi.h
View File

@ -66,7 +66,7 @@ static inline void __send_IPI_shortcut(unsigned int shortcut, int vector, unsign
/*
* Send the IPI. The write to APIC_ICR fires this off.
*/
apic_write_around(APIC_ICR, cfg);
apic_write(APIC_ICR, cfg);
}
@ -92,7 +92,7 @@ static inline void send_IPI_mask_sequence(cpumask_t mask, int vector)
* prepare target chip field
*/
cfg = __prepare_ICR2(x86_cpu_to_apicid[query_cpu]);
apic_write_around(APIC_ICR2, cfg);
apic_write(APIC_ICR2, cfg);
/*
* program the ICR
@ -102,7 +102,7 @@ static inline void send_IPI_mask_sequence(cpumask_t mask, int vector)
/*
* Send the IPI. The write to APIC_ICR fires this off.
*/
apic_write_around(APIC_ICR, cfg);
apic_write(APIC_ICR, cfg);
}
local_irq_restore(flags);
}