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Commit 9766cdbc authored by Jaswinder Singh Rajput's avatar Jaswinder Singh Rajput Committed by Ingo Molnar
Browse files

x86: cpu/common.c cleanups 



- fix various style problems
 - declare varibles before they get used
 - introduced clear_all_debug_regs
 - fix header files issues

LKML-Reference: <1237009789.4387.2.camel@localhost.localdomain>
Signed-off-by: default avatarJaswinder Singh Rajput <jaswinder@kernel.org>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent bf5172d0

arch/x86/include/asm/processor.h

+3 −0
Original line number Diff line number Diff line
@@ -391,6 +391,9 @@ DECLARE_PER_CPU(union irq_stack_union, irq_stack_union); 
DECLARE_INIT_PER_CPU(irq_stack_union);



DECLARE_PER_CPU(char *, irq_stack_ptr);

DECLARE_PER_CPU(unsigned int, irq_count);

extern unsigned long kernel_eflags;

extern asmlinkage void ignore_sysret(void);

#else	/* X86_64 */

#ifdef CONFIG_CC_STACKPROTECTOR

DECLARE_PER_CPU(unsigned long, stack_canary);

arch/x86/kernel/cpu/common.c

+65 −64
Original line number Diff line number Diff line 
#include <linux/init.h>

#include <linux/kernel.h>

#include <linux/sched.h>

#include <linux/string.h>

#include <linux/topology.h>

#include <linux/bootmem.h>

#include <linux/linkage.h>

#include <linux/bitops.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/kgdb.h>

#include <linux/topology.h>

#include <linux/percpu.h>

#include <linux/string.h>

#include <linux/delay.h>

#include <linux/sched.h>

#include <linux/init.h>

#include <linux/kgdb.h>

#include <linux/smp.h>

#include <linux/percpu.h>

#include <asm/i387.h>

#include <asm/msr.h>

#include <asm/io.h>

#include <asm/linkage.h>

#include <linux/io.h>



#include <asm/stackprotector.h>

#include <asm/mmu_context.h>

#include <asm/hypervisor.h>

#include <asm/processor.h>

#include <asm/sections.h>

#include <asm/cpumask.h>

#include <asm/pgtable.h>

#include <asm/atomic.h>

#include <asm/proto.h>

#include <asm/setup.h>

#include <asm/apic.h>

#include <asm/desc.h>

#include <asm/i387.h>

#include <asm/mtrr.h>

#include <asm/numa.h>

#include <asm/asm.h>

#include <asm/cpu.h>

#include <asm/mce.h>

#include <asm/msr.h>

#include <asm/pat.h>

#include <asm/asm.h>

#include <asm/numa.h>

#include <asm/smp.h>

#include <asm/cpu.h>

#include <asm/cpumask.h>

#include <asm/apic.h>



#ifdef CONFIG_X86_LOCAL_APIC

#include <asm/uv/uv.h>

#endif



#include <asm/pgtable.h>

#include <asm/processor.h>

#include <asm/desc.h>

#include <asm/atomic.h>

#include <asm/proto.h>

#include <asm/sections.h>

#include <asm/setup.h>

#include <asm/hypervisor.h>

#include <asm/stackprotector.h>



#include "cpu.h"



#ifdef CONFIG_X86_64



/* all of these masks are initialized in setup_cpu_local_masks() */

cpumask_var_t cpu_callin_mask;

cpumask_var_t cpu_callout_mask;

cpumask_var_t cpu_initialized_mask;

cpumask_var_t cpu_callout_mask;

cpumask_var_t cpu_callin_mask;



/* representing cpus for which sibling maps can be computed */

cpumask_var_t cpu_sibling_setup_mask;
@@ -62,10 +62,10 @@ void __init setup_cpu_local_masks(void) 


#else /* CONFIG_X86_32 */



cpumask_t cpu_callin_map;

cpumask_t cpu_sibling_setup_map;

cpumask_t cpu_callout_map;

cpumask_t cpu_initialized;

cpumask_t cpu_sibling_setup_map;

cpumask_t cpu_callin_map;



#endif /* CONFIG_X86_32 */
@@ -79,7 +79,7 @@ DEFINE_PER_CPU_PAGE_ALIGNED(struct gdt_page, gdt_page) = { .gdt = { 
	 * IRET will check the segment types  kkeil 2000/10/28

	 * Also sysret mandates a special GDT layout

	 *

	 * The TLS descriptors are currently at a different place compared to i386.

	 * TLS descriptors are currently at a different place compared to i386.

	 * Hopefully nobody expects them at a fixed place (Wine?)

	 */

	[GDT_ENTRY_KERNEL32_CS] = { { { 0x0000ffff, 0x00cf9b00 } } },
@@ -243,6 +243,7 @@ cpuid_dependent_features[] = { 
static void __cpuinit filter_cpuid_features(struct cpuinfo_x86 *c, bool warn)

{

	const struct cpuid_dependent_feature *df;



	for (df = cpuid_dependent_features; df->feature; df++) {

		/*

		 * Note: cpuid_level is set to -1 if unavailable, but
@@ -441,14 +442,15 @@ void __cpuinit detect_ht(struct cpuinfo_x86 *c) 
	} else if (smp_num_siblings > 1) {



		if (smp_num_siblings > nr_cpu_ids) {

			printk(KERN_WARNING "CPU: Unsupported number of siblings %d",

			pr_warning("CPU: Unsupported number of siblings %d",

				   smp_num_siblings);

			smp_num_siblings = 1;

			return;

		}



		index_msb = get_count_order(smp_num_siblings);

		c->phys_proc_id = apic->phys_pkg_id(c->initial_apicid, index_msb);

		c->phys_proc_id = apic->phys_pkg_id(c->initial_apicid,

						    index_msb);



		smp_num_siblings = smp_num_siblings / c->x86_max_cores;
@@ -491,7 +493,8 @@ static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c) 


	if (!printed) {

		printed++;

		printk(KERN_ERR "CPU: vendor_id '%s' unknown, using generic init.\n", v);

		printk(KERN_ERR "CPU: vendor_id '%s'"

			"unknown, using generic init.\n", v);

		printk(KERN_ERR "CPU: Your system may be unstable.\n");

	}
@@ -637,7 +640,7 @@ void __init early_cpu_init(void) 
	struct cpu_dev **cdev;

	int count = 0;



	printk("KERNEL supported cpus:\n");

	printk(KERN_INFO "KERNEL supported cpus:\n");

	for (cdev = __x86_cpu_dev_start; cdev < __x86_cpu_dev_end; cdev++) {

		struct cpu_dev *cpudev = *cdev;

		unsigned int j;
@@ -650,7 +653,7 @@ void __init early_cpu_init(void) 
		for (j = 0; j < 2; j++) {

			if (!cpudev->c_ident[j])

				continue;

			printk("  %s %s\n", cpudev->c_vendor,

			printk(KERN_INFO "  %s %s\n", cpudev->c_vendor,

				cpudev->c_ident[j]);

		}

	}
@@ -952,8 +955,6 @@ static DEFINE_PER_CPU_PAGE_ALIGNED(char, exception_stacks 
	[(N_EXCEPTION_STACKS - 1) * EXCEPTION_STKSZ + DEBUG_STKSZ])

	__aligned(PAGE_SIZE);



extern asmlinkage void ignore_sysret(void);



/* May not be marked __init: used by software suspend */

void syscall_init(void)

{
@@ -999,6 +1000,22 @@ struct pt_regs * __cpuinit idle_regs(struct pt_regs *regs) 
}

#endif	/* x86_64 */



/*

 * Clear all 6 debug registers:

 */

static void clear_all_debug_regs(void)

{

	int i;



	for (i = 0; i < 8; i++) {

		/* Ignore db4, db5 */

		if ((i == 4) || (i == 5))

			continue;



		set_debugreg(0, i);

	}

}



/*

 * cpu_init() initializes state that is per-CPU. Some data is already

 * initialized (naturally) in the bootstrap process, such as the GDT
@@ -1098,17 +1115,7 @@ void __cpuinit cpu_init(void) 
		arch_kgdb_ops.correct_hw_break();

	else

#endif

	{

		/*

		 * Clear all 6 debug registers:

		 */

		set_debugreg(0UL, 0);

		set_debugreg(0UL, 1);

		set_debugreg(0UL, 2);

		set_debugreg(0UL, 3);

		set_debugreg(0UL, 6);

		set_debugreg(0UL, 7);

	}

		clear_all_debug_regs();



	fpu_init();
@@ -1129,7 +1136,8 @@ void __cpuinit cpu_init(void) 


	if (cpumask_test_and_set_cpu(cpu, cpu_initialized_mask)) {

		printk(KERN_WARNING "CPU#%d already initialized!\n", cpu);

		for (;;) local_irq_enable();

		for (;;)

			local_irq_enable();

	}



	printk(KERN_INFO "Initializing CPU#%d\n", cpu);
@@ -1159,13 +1167,7 @@ void __cpuinit cpu_init(void) 
	__set_tss_desc(cpu, GDT_ENTRY_DOUBLEFAULT_TSS, &doublefault_tss);

#endif



	/* Clear all 6 debug registers: */

	set_debugreg(0, 0);

	set_debugreg(0, 1);

	set_debugreg(0, 2);

	set_debugreg(0, 3);

	set_debugreg(0, 6);

	set_debugreg(0, 7);

	clear_all_debug_regs();



	/*

	 * Force FPU initialization:
@@ -1186,5 +1188,4 @@ void __cpuinit cpu_init(void) 
	xsave_init();

}





#endif