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Diffstat (limited to 'arch/i386/kernel/apm.c')
-rw-r--r--arch/i386/kernel/apm.c66
1 files changed, 44 insertions, 22 deletions
diff --git a/arch/i386/kernel/apm.c b/arch/i386/kernel/apm.c
index d7811c4e8b5..1e60acbed3c 100644
--- a/arch/i386/kernel/apm.c
+++ b/arch/i386/kernel/apm.c
@@ -218,6 +218,7 @@
#include <linux/time.h>
#include <linux/sched.h>
#include <linux/pm.h>
+#include <linux/pm_legacy.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/smp.h>
@@ -447,8 +448,7 @@ static char * apm_event_name[] = {
"system standby resume",
"capabilities change"
};
-#define NR_APM_EVENT_NAME \
- (sizeof(apm_event_name) / sizeof(apm_event_name[0]))
+#define NR_APM_EVENT_NAME ARRAY_SIZE(apm_event_name)
typedef struct lookup_t {
int key;
@@ -479,7 +479,7 @@ static const lookup_t error_table[] = {
{ APM_NO_ERROR, "BIOS did not set a return code" },
{ APM_NOT_PRESENT, "No APM present" }
};
-#define ERROR_COUNT (sizeof(error_table)/sizeof(lookup_t))
+#define ERROR_COUNT ARRAY_SIZE(error_table)
/**
* apm_error - display an APM error
@@ -597,12 +597,14 @@ static u8 apm_bios_call(u32 func, u32 ebx_in, u32 ecx_in,
cpumask_t cpus;
int cpu;
struct desc_struct save_desc_40;
+ struct desc_struct *gdt;
cpus = apm_save_cpus();
cpu = get_cpu();
- save_desc_40 = per_cpu(cpu_gdt_table, cpu)[0x40 / 8];
- per_cpu(cpu_gdt_table, cpu)[0x40 / 8] = bad_bios_desc;
+ gdt = get_cpu_gdt_table(cpu);
+ save_desc_40 = gdt[0x40 / 8];
+ gdt[0x40 / 8] = bad_bios_desc;
local_save_flags(flags);
APM_DO_CLI;
@@ -610,7 +612,7 @@ static u8 apm_bios_call(u32 func, u32 ebx_in, u32 ecx_in,
apm_bios_call_asm(func, ebx_in, ecx_in, eax, ebx, ecx, edx, esi);
APM_DO_RESTORE_SEGS;
local_irq_restore(flags);
- per_cpu(cpu_gdt_table, cpu)[0x40 / 8] = save_desc_40;
+ gdt[0x40 / 8] = save_desc_40;
put_cpu();
apm_restore_cpus(cpus);
@@ -639,13 +641,14 @@ static u8 apm_bios_call_simple(u32 func, u32 ebx_in, u32 ecx_in, u32 *eax)
cpumask_t cpus;
int cpu;
struct desc_struct save_desc_40;
-
+ struct desc_struct *gdt;
cpus = apm_save_cpus();
cpu = get_cpu();
- save_desc_40 = per_cpu(cpu_gdt_table, cpu)[0x40 / 8];
- per_cpu(cpu_gdt_table, cpu)[0x40 / 8] = bad_bios_desc;
+ gdt = get_cpu_gdt_table(cpu);
+ save_desc_40 = gdt[0x40 / 8];
+ gdt[0x40 / 8] = bad_bios_desc;
local_save_flags(flags);
APM_DO_CLI;
@@ -653,7 +656,7 @@ static u8 apm_bios_call_simple(u32 func, u32 ebx_in, u32 ecx_in, u32 *eax)
error = apm_bios_call_simple_asm(func, ebx_in, ecx_in, eax);
APM_DO_RESTORE_SEGS;
local_irq_restore(flags);
- __get_cpu_var(cpu_gdt_table)[0x40 / 8] = save_desc_40;
+ gdt[0x40 / 8] = save_desc_40;
put_cpu();
apm_restore_cpus(cpus);
return error;
@@ -767,8 +770,26 @@ static int set_system_power_state(u_short state)
static int apm_do_idle(void)
{
u32 eax;
+ u8 ret = 0;
+ int idled = 0;
+ int polling;
+
+ polling = test_thread_flag(TIF_POLLING_NRFLAG);
+ if (polling) {
+ clear_thread_flag(TIF_POLLING_NRFLAG);
+ smp_mb__after_clear_bit();
+ }
+ if (!need_resched()) {
+ idled = 1;
+ ret = apm_bios_call_simple(APM_FUNC_IDLE, 0, 0, &eax);
+ }
+ if (polling)
+ set_thread_flag(TIF_POLLING_NRFLAG);
+
+ if (!idled)
+ return 0;
- if (apm_bios_call_simple(APM_FUNC_IDLE, 0, 0, &eax)) {
+ if (ret) {
static unsigned long t;
/* This always fails on some SMP boards running UP kernels.
@@ -2295,35 +2316,36 @@ static int __init apm_init(void)
apm_bios_entry.segment = APM_CS;
for (i = 0; i < NR_CPUS; i++) {
- set_base(per_cpu(cpu_gdt_table, i)[APM_CS >> 3],
+ struct desc_struct *gdt = get_cpu_gdt_table(i);
+ set_base(gdt[APM_CS >> 3],
__va((unsigned long)apm_info.bios.cseg << 4));
- set_base(per_cpu(cpu_gdt_table, i)[APM_CS_16 >> 3],
+ set_base(gdt[APM_CS_16 >> 3],
__va((unsigned long)apm_info.bios.cseg_16 << 4));
- set_base(per_cpu(cpu_gdt_table, i)[APM_DS >> 3],
+ set_base(gdt[APM_DS >> 3],
__va((unsigned long)apm_info.bios.dseg << 4));
#ifndef APM_RELAX_SEGMENTS
if (apm_info.bios.version == 0x100) {
#endif
/* For ASUS motherboard, Award BIOS rev 110 (and others?) */
- _set_limit((char *)&per_cpu(cpu_gdt_table, i)[APM_CS >> 3], 64 * 1024 - 1);
+ _set_limit((char *)&gdt[APM_CS >> 3], 64 * 1024 - 1);
/* For some unknown machine. */
- _set_limit((char *)&per_cpu(cpu_gdt_table, i)[APM_CS_16 >> 3], 64 * 1024 - 1);
+ _set_limit((char *)&gdt[APM_CS_16 >> 3], 64 * 1024 - 1);
/* For the DEC Hinote Ultra CT475 (and others?) */
- _set_limit((char *)&per_cpu(cpu_gdt_table, i)[APM_DS >> 3], 64 * 1024 - 1);
+ _set_limit((char *)&gdt[APM_DS >> 3], 64 * 1024 - 1);
#ifndef APM_RELAX_SEGMENTS
} else {
- _set_limit((char *)&per_cpu(cpu_gdt_table, i)[APM_CS >> 3],
+ _set_limit((char *)&gdt[APM_CS >> 3],
(apm_info.bios.cseg_len - 1) & 0xffff);
- _set_limit((char *)&per_cpu(cpu_gdt_table, i)[APM_CS_16 >> 3],
+ _set_limit((char *)&gdt[APM_CS_16 >> 3],
(apm_info.bios.cseg_16_len - 1) & 0xffff);
- _set_limit((char *)&per_cpu(cpu_gdt_table, i)[APM_DS >> 3],
+ _set_limit((char *)&gdt[APM_DS >> 3],
(apm_info.bios.dseg_len - 1) & 0xffff);
/* workaround for broken BIOSes */
if (apm_info.bios.cseg_len <= apm_info.bios.offset)
- _set_limit((char *)&per_cpu(cpu_gdt_table, i)[APM_CS >> 3], 64 * 1024 -1);
+ _set_limit((char *)&gdt[APM_CS >> 3], 64 * 1024 -1);
if (apm_info.bios.dseg_len <= 0x40) { /* 0x40 * 4kB == 64kB */
/* for the BIOS that assumes granularity = 1 */
- per_cpu(cpu_gdt_table, i)[APM_DS >> 3].b |= 0x800000;
+ gdt[APM_DS >> 3].b |= 0x800000;
printk(KERN_NOTICE "apm: we set the granularity of dseg.\n");
}
}
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