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Subject[PATCH 07/10] x86: Cleanup x86_cpu_to_apicid references
Clean up references to x86_cpu_to_apicid.  Removes extraneous
comments and standardizes on "x86_*_early_ptr" for the early
kernel init references.

Signed-off-by: Mike Travis <travis@sgi.com>
Reviewed-by: Christoph Lameter <clameter@sgi.com>
---
arch/x86/kernel/genapic_64.c | 11 ++---------
arch/x86/kernel/mpparse_64.c | 11 +++--------
arch/x86/kernel/setup_64.c | 2 +-
arch/x86/kernel/smpboot_32.c | 9 ++-------
arch/x86/kernel/smpboot_64.c | 16 +++++++++-------
include/asm-x86/smp_32.h | 2 +-
include/asm-x86/smp_64.h | 2 +-
7 files changed, 19 insertions(+), 34 deletions(-)
--- a/arch/x86/kernel/genapic_64.c
+++ b/arch/x86/kernel/genapic_64.c
@@ -24,17 +24,10 @@
#include <acpi/acpi_bus.h>
#endif

-/*
- * which logical CPU number maps to which CPU (physical APIC ID)
- *
- * The following static array is used during kernel startup
- * and the x86_cpu_to_apicid_ptr contains the address of the
- * array during this time. Is it zeroed when the per_cpu
- * data area is removed.
- */
+/* which logical CPU number maps to which CPU (physical APIC ID) */
u16 x86_cpu_to_apicid_init[NR_CPUS] __initdata
= { [0 ... NR_CPUS-1] = BAD_APICID };
-void *x86_cpu_to_apicid_ptr;
+void *x86_cpu_to_apicid_early_ptr;
DEFINE_PER_CPU(u16, x86_cpu_to_apicid) = BAD_APICID;
EXPORT_PER_CPU_SYMBOL(x86_cpu_to_apicid);

--- a/arch/x86/kernel/mpparse_64.c
+++ b/arch/x86/kernel/mpparse_64.c
@@ -125,14 +125,9 @@ static void __cpuinit MP_processor_info(
cpu = 0;
}
bios_cpu_apicid[cpu] = m->mpc_apicid;
- /*
- * We get called early in the the start_kernel initialization
- * process when the per_cpu data area is not yet setup, so we
- * use a static array that is removed after the per_cpu data
- * area is created.
- */
- if (x86_cpu_to_apicid_ptr) {
- u16 *x86_cpu_to_apicid = (u16 *)x86_cpu_to_apicid_ptr;
+ /* are we being called early in kernel startup? */
+ if (x86_cpu_to_apicid_early_ptr) {
+ u16 *x86_cpu_to_apicid = (u16 *)x86_cpu_to_apicid_early_ptr;
x86_cpu_to_apicid[cpu] = m->mpc_apicid;
} else {
per_cpu(x86_cpu_to_apicid, cpu) = m->mpc_apicid;
--- a/arch/x86/kernel/setup_64.c
+++ b/arch/x86/kernel/setup_64.c
@@ -373,7 +373,7 @@ void __init setup_arch(char **cmdline_p)

#ifdef CONFIG_SMP
/* setup to use the static apicid table during kernel startup */
- x86_cpu_to_apicid_ptr = (void *)&x86_cpu_to_apicid_init;
+ x86_cpu_to_apicid_early_ptr = (void *)&x86_cpu_to_apicid_init;
#endif

#ifdef CONFIG_ACPI
--- a/arch/x86/kernel/smpboot_32.c
+++ b/arch/x86/kernel/smpboot_32.c
@@ -91,15 +91,10 @@ static cpumask_t smp_commenced_mask;
DEFINE_PER_CPU_SHARED_ALIGNED(struct cpuinfo_x86, cpu_info);
EXPORT_PER_CPU_SYMBOL(cpu_info);

-/*
- * The following static array is used during kernel startup
- * and the x86_cpu_to_apicid_ptr contains the address of the
- * array during this time. Is it zeroed when the per_cpu
- * data area is removed.
- */
+/* which logical CPU number maps to which CPU (physical APIC ID) */
u8 x86_cpu_to_apicid_init[NR_CPUS] __initdata =
{ [0 ... NR_CPUS-1] = BAD_APICID };
-void *x86_cpu_to_apicid_ptr;
+void *x86_cpu_to_apicid_early_ptr;
DEFINE_PER_CPU(u8, x86_cpu_to_apicid) = BAD_APICID;
EXPORT_PER_CPU_SYMBOL(x86_cpu_to_apicid);

--- a/arch/x86/kernel/smpboot_64.c
+++ b/arch/x86/kernel/smpboot_64.c
@@ -852,23 +852,25 @@ static int __init smp_sanity_check(unsig
}

/*
- * Copy apicid's found by MP_processor_info from initial array to the per cpu
- * data area. The x86_cpu_to_apicid_init array is then expendable and the
- * x86_cpu_to_apicid_ptr is zeroed indicating that the static array is no
- * longer available.
+ * Copy data used in early init routines from the initial arrays to the
+ * per cpu data areas. These arrays then become expendable and the
+ * *_ptrs are zeroed indicating that the static arrays are gone.
*/
void __init smp_set_apicids(void)
{
int cpu;

- for_each_cpu_mask(cpu, cpu_possible_map) {
+ for_each_possible_cpu(cpu) {
if (per_cpu_offset(cpu))
per_cpu(x86_cpu_to_apicid, cpu) =
x86_cpu_to_apicid_init[cpu];
+ else
+ printk(KERN_NOTICE "per_cpu_offset zero for cpu %d\n",
+ cpu);
}

- /* indicate the static array will be going away soon */
- x86_cpu_to_apicid_ptr = NULL;
+ /* indicate the early static arrays are gone */
+ x86_cpu_to_apicid_early_ptr = NULL;
}

static void __init smp_cpu_index_default(void)
--- a/include/asm-x86/smp_32.h
+++ b/include/asm-x86/smp_32.h
@@ -30,7 +30,7 @@ extern void (*mtrr_hook) (void);
extern void zap_low_mappings (void);

extern u8 __initdata x86_cpu_to_apicid_init[];
-extern void *x86_cpu_to_apicid_ptr;
+extern void *x86_cpu_to_apicid_early_ptr;

DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
DECLARE_PER_CPU(cpumask_t, cpu_core_map);
--- a/include/asm-x86/smp_64.h
+++ b/include/asm-x86/smp_64.h
@@ -27,7 +27,7 @@ extern int smp_call_function_mask(cpumas
void *info, int wait);

extern u16 __initdata x86_cpu_to_apicid_init[];
-extern void *x86_cpu_to_apicid_ptr;
+extern void *x86_cpu_to_apicid_early_ptr;
extern u16 bios_cpu_apicid[];

DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
--


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