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x86: clean up process_32/64.c 

White space and coding style clean up.
Make process_32/64.c similar.

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Hiroshi Shimamoto 2008-01-30 13:31:03 +01:00 committed by Ingo Molnar
parent 3c2362e629
commit 6612538ca9
2 changed files with 102 additions and 103 deletions
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4
arch/x86/kernel/process_32.c
View File

@ -142,7 +142,7 @@ EXPORT_SYMBOL(default_idle);
* to poll the ->work.need_resched flag instead of waiting for the
* cross-CPU IPI to arrive. Use this option with caution.
*/
static void poll_idle (void)
static void poll_idle(void)
{
cpu_relax();
}
@ -493,7 +493,7 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
p->thread.ip = (unsigned long) ret_from_fork;
savesegment(gs,p->thread.gs);
savesegment(gs, p->thread.gs);
tsk = current;
if (unlikely(test_tsk_thread_flag(tsk, TIF_IO_BITMAP))) {

145
arch/x86/kernel/process_64.c
View File

@ -19,19 +19,19 @@
#include <linux/cpu.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/elfcore.h>
#include <linux/smp.h>
#include <linux/slab.h>
#include <linux/user.h>
#include <linux/module.h>
#include <linux/a.out.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/ptrace.h>
#include <linux/utsname.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/ptrace.h>
#include <linux/random.h>
#include <linux/notifier.h>
#include <linux/kprobes.h>
@ -129,54 +129,12 @@ static void default_idle(void)
* to poll the ->need_resched flag instead of waiting for the
* cross-CPU IPI to arrive. Use this option with caution.
*/
static void poll_idle (void)
static void poll_idle(void)
{
local_irq_enable();
cpu_relax();
}
static void do_nothing(void *unused)
{
}
void cpu_idle_wait(void)
{
unsigned int cpu, this_cpu = get_cpu();
cpumask_t map, tmp = current->cpus_allowed;
set_cpus_allowed(current, cpumask_of_cpu(this_cpu));
put_cpu();
cpus_clear(map);
for_each_online_cpu(cpu) {
per_cpu(cpu_idle_state, cpu) = 1;
cpu_set(cpu, map);
}
__get_cpu_var(cpu_idle_state) = 0;
wmb();
do {
ssleep(1);
for_each_online_cpu(cpu) {
if (cpu_isset(cpu, map) &&
!per_cpu(cpu_idle_state, cpu))
cpu_clear(cpu, map);
}
cpus_and(map, map, cpu_online_map);
/*
* We waited 1 sec, if a CPU still did not call idle
* it may be because it is in idle and not waking up
* because it has nothing to do.
* Give all the remaining CPUS a kick.
*/
smp_call_function_mask(map, do_nothing, 0, 0);
} while (!cpus_empty(map));
set_cpus_allowed(current, tmp);
}
EXPORT_SYMBOL_GPL(cpu_idle_wait);
#ifdef CONFIG_HOTPLUG_CPU
DECLARE_PER_CPU(int, cpu_state);
@ -247,6 +205,47 @@ void cpu_idle(void)
}
}
static void do_nothing(void *unused)
{
}
void cpu_idle_wait(void)
{
unsigned int cpu, this_cpu = get_cpu();
cpumask_t map, tmp = current->cpus_allowed;
set_cpus_allowed(current, cpumask_of_cpu(this_cpu));
put_cpu();
cpus_clear(map);
for_each_online_cpu(cpu) {
per_cpu(cpu_idle_state, cpu) = 1;
cpu_set(cpu, map);
}
__get_cpu_var(cpu_idle_state) = 0;
wmb();
do {
ssleep(1);
for_each_online_cpu(cpu) {
if (cpu_isset(cpu, map) && !per_cpu(cpu_idle_state, cpu))
cpu_clear(cpu, map);
}
cpus_and(map, map, cpu_online_map);
/*
* We waited 1 sec, if a CPU still did not call idle
* it may be because it is in idle and not waking up
* because it has nothing to do.
* Give all the remaining CPUS a kick.
*/
smp_call_function_mask(map, do_nothing, 0, 0);
} while (!cpus_empty(map));
set_cpus_allowed(current, tmp);
}
EXPORT_SYMBOL_GPL(cpu_idle_wait);
/*
* This uses new MONITOR/MWAIT instructions on P4 processors with PNI,
* which can obviate IPI to trigger checking of need_resched.
@ -300,7 +299,7 @@ void __cpuinit select_idle_routine(const struct cpuinfo_x86 *c)
}
}
static int __init idle_setup (char *str)
static int __init idle_setup(char *str)
{
if (!strcmp(str, "poll")) {
printk("using polling idle threads.\n");
@ -320,8 +319,8 @@ void __show_regs(struct pt_regs * regs)
{
unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L, fs, gs, shadowgs;
unsigned long d0, d1, d2, d3, d6, d7;
unsigned int fsindex,gsindex;
unsigned int ds,cs,es;
unsigned int fsindex, gsindex;
unsigned int ds, cs, es;
printk("\n");
print_modules();
@ -544,11 +543,29 @@ out:
/*
* This special macro can be used to load a debugging register
*/
#define loaddebug(thread,r) set_debugreg(thread->debugreg ## r, r)
#define loaddebug(thread, r) set_debugreg(thread->debugreg ## r, r)
/*
* Capture the user space registers if the task is not running (in user space)
*/
int dump_task_regs(struct task_struct *tsk, elf_gregset_t *regs)
{
struct pt_regs *pp, ptregs;
pp = task_pt_regs(tsk);
ptregs = *pp;
ptregs.cs &= 0xffff;
ptregs.ss &= 0xffff;
elf_core_copy_regs(regs, &ptregs);
return 1;
}
static inline void __switch_to_xtra(struct task_struct *prev_p,
struct task_struct *next_p,
struct tss_struct *tss)
struct task_struct *next_p,
struct tss_struct *tss)
{
struct thread_struct *prev, *next;
@ -726,7 +743,7 @@ void set_personality_64bit(void)
/* TBD: overwrites user setup. Should have two bits.
But 64bit processes have always behaved this way,
so it's not too bad. The main problem is just that
32bit childs are affected again. */
32bit childs are affected again. */
current->personality &= ~READ_IMPLIES_EXEC;
}
@ -860,7 +877,7 @@ long do_arch_prctl(struct task_struct *task, int code, unsigned long addr)
if (task->thread.gsindex == GS_TLS_SEL)
base = read_32bit_tls(task, GS_TLS);
else if (doit) {
asm("movl %%gs,%0" : "=r" (gsindex));
asm("movl %%gs,%0" : "=r" (gsindex));
if (gsindex)
rdmsrl(MSR_KERNEL_GS_BASE, base);
else
@ -885,24 +902,6 @@ long sys_arch_prctl(int code, unsigned long addr)
return do_arch_prctl(current, code, addr);
}
/*
* Capture the user space registers if the task is not running (in user space)
*/
int dump_task_regs(struct task_struct *tsk, elf_gregset_t *regs)
{
struct pt_regs *pp, ptregs;
pp = task_pt_regs(tsk);
ptregs = *pp;
ptregs.cs &= 0xffff;
ptregs.ss &= 0xffff;
elf_core_copy_regs(regs, &ptregs);
return 1;
}
unsigned long arch_align_stack(unsigned long sp)
{
if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)