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: Jaswinder Singh Rajput <jaswinder@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 7613950..dccef5b 100644 (file)
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -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);

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 826d5c8..cad6878 100644 (file)
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1,52 +1,52 @@
-#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
@@ -364,12 +365,12 @@ static void __cpuinit get_model_name(struct cpuinfo_x86 *c)
           undo that brain damage */
        p = q = &c->x86_model_id[0];
        while (*p == ' ')
-            p++;
+               p++;
        if (p != q) {
-            while (*p)
-                 *q++ = *p++;
-            while (q <= &c->x86_model_id[48])
-                 *q++ = '\0';  /* Zero-pad the rest */
+               while (*p)
+                       *q++ = *p++;
+               while (q <= &c->x86_model_id[48])
+                       *q++ = '\0';    /* Zero-pad the rest */
        }
 }
 
@@ -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",
-                                       smp_num_siblings);
+                       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)
 {
@@ -1000,6 +1001,22 @@ 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
  * and IDT. We reload them nevertheless, this function acts as a
@@ -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