Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6

[linux-2.6] / arch / x86 / kernel / traps_32.c

diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
index fb8e3cce7bfb6ba77895fea3ae05f084fec888c9..03df8e45e5a1562e6d63f149a6189eb7964e7335 100644 (file)
--- a/arch/x86/kernel/traps_32.c
+++ b/arch/x86/kernel/traps_32.c
@@ -58,6 +58,7 @@
 #include <asm/nmi.h>
 #include <asm/smp.h>
 #include <asm/io.h>
+#include <asm/traps.h>
 
 #include "mach_traps.h"
 
@@ -77,26 +78,6 @@ char ignore_fpu_irq;
 gate_desc idt_table[256]
        __attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
 
-asmlinkage void divide_error(void);
-asmlinkage void debug(void);
-asmlinkage void nmi(void);
-asmlinkage void int3(void);
-asmlinkage void overflow(void);
-asmlinkage void bounds(void);
-asmlinkage void invalid_op(void);
-asmlinkage void device_not_available(void);
-asmlinkage void coprocessor_segment_overrun(void);
-asmlinkage void invalid_TSS(void);
-asmlinkage void segment_not_present(void);
-asmlinkage void stack_segment(void);
-asmlinkage void general_protection(void);
-asmlinkage void page_fault(void);
-asmlinkage void coprocessor_error(void);
-asmlinkage void simd_coprocessor_error(void);
-asmlinkage void alignment_check(void);
-asmlinkage void spurious_interrupt_bug(void);
-asmlinkage void machine_check(void);
-
 int panic_on_unrecovered_nmi;
 int kstack_depth_to_print = 24;
 static unsigned int code_bytes = 64;
@@ -106,13 +87,13 @@ static int die_counter;
 void printk_address(unsigned long address, int reliable)
 {
 #ifdef CONFIG_KALLSYMS
-       char namebuf[KSYM_NAME_LEN];
        unsigned long offset = 0;
        unsigned long symsize;
        const char *symname;
-       char reliab[4] = "";
-       char *delim = ":";
        char *modname;
+       char *delim = ":";
+       char namebuf[KSYM_NAME_LEN];
+       char reliab[4] = "";
 
        symname = kallsyms_lookup(address, &symsize, &offset,
                                        &modname, namebuf);
@@ -135,8 +116,8 @@ void printk_address(unsigned long address, int reliable)
 static inline int valid_stack_ptr(struct thread_info *tinfo,
                        void *p, unsigned int size)
 {
-       return  p > (void *)tinfo &&
-               p <= (void *)tinfo + THREAD_SIZE - size;
+       void *t = tinfo;
+       return  p > t && p <= t + THREAD_SIZE - size;
 }
 
 /* The form of the top of the frame on the stack */
@@ -256,7 +237,7 @@ static const struct stacktrace_ops print_trace_ops = {
 
 static void
 show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
-                  unsigned long *stack, unsigned long bp, char *log_lvl)
+               unsigned long *stack, unsigned long bp, char *log_lvl)
 {
        dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
        printk("%s =======================\n", log_lvl);
@@ -383,6 +364,54 @@ int is_valid_bugaddr(unsigned long ip)
        return ud2 == 0x0b0f;
 }
 
+static raw_spinlock_t die_lock = __RAW_SPIN_LOCK_UNLOCKED;
+static int die_owner = -1;
+static unsigned int die_nest_count;
+
+unsigned __kprobes long oops_begin(void)
+{
+       unsigned long flags;
+
+       oops_enter();
+
+       if (die_owner != raw_smp_processor_id()) {
+               console_verbose();
+               raw_local_irq_save(flags);
+               __raw_spin_lock(&die_lock);
+               die_owner = smp_processor_id();
+               die_nest_count = 0;
+               bust_spinlocks(1);
+       } else {
+               raw_local_irq_save(flags);
+       }
+       die_nest_count++;
+       return flags;
+}
+
+void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
+{
+       bust_spinlocks(0);
+       die_owner = -1;
+       add_taint(TAINT_DIE);
+       __raw_spin_unlock(&die_lock);
+       raw_local_irq_restore(flags);
+
+       if (!regs)
+               return;
+
+       if (kexec_should_crash(current))
+               crash_kexec(regs);
+
+       if (in_interrupt())
+               panic("Fatal exception in interrupt");
+
+       if (panic_on_oops)
+               panic("Fatal exception");
+
+       oops_exit();
+       do_exit(signr);
+}
+
 int __kprobes __die(const char *str, struct pt_regs *regs, long err)
 {
        unsigned short ss;
@@ -423,31 +452,9 @@ int __kprobes __die(const char *str, struct pt_regs *regs, long err)
  */
 void die(const char *str, struct pt_regs *regs, long err)
 {
-       static struct {
-               raw_spinlock_t lock;
-               u32 lock_owner;
-               int lock_owner_depth;
-       } die = {
-               .lock =                 __RAW_SPIN_LOCK_UNLOCKED,
-               .lock_owner =           -1,
-               .lock_owner_depth =     0
-       };
-       unsigned long flags;
-
-       oops_enter();
-
-       if (die.lock_owner != raw_smp_processor_id()) {
-               console_verbose();
-               raw_local_irq_save(flags);
-               __raw_spin_lock(&die.lock);
-               die.lock_owner = smp_processor_id();
-               die.lock_owner_depth = 0;
-               bust_spinlocks(1);
-       } else {
-               raw_local_irq_save(flags);
-       }
+       unsigned long flags = oops_begin();
 
-       if (++die.lock_owner_depth < 3) {
+       if (die_nest_count < 3) {
                report_bug(regs->ip, regs);
 
                if (__die(str, regs, err))
@@ -456,26 +463,7 @@ void die(const char *str, struct pt_regs *regs, long err)
                printk(KERN_EMERG "Recursive die() failure, output suppressed\n");
        }
 
-       bust_spinlocks(0);
-       die.lock_owner = -1;
-       add_taint(TAINT_DIE);
-       __raw_spin_unlock(&die.lock);
-       raw_local_irq_restore(flags);
-
-       if (!regs)
-               return;
-
-       if (kexec_should_crash(current))
-               crash_kexec(regs);
-
-       if (in_interrupt())
-               panic("Fatal exception in interrupt");
-
-       if (panic_on_oops)
-               panic("Fatal exception");
-
-       oops_exit();
-       do_exit(SIGSEGV);
+       oops_end(flags, regs, SIGSEGV);
 }
 
 static inline void
@@ -976,9 +964,8 @@ clear_TF_reenable:
 void math_error(void __user *ip)
 {
        struct task_struct *task;
-       unsigned short cwd;
-       unsigned short swd;
        siginfo_t info;
+       unsigned short cwd, swd;
 
        /*
         * Save the info for the exception handler and clear the error.
@@ -1042,8 +1029,8 @@ void do_coprocessor_error(struct pt_regs *regs, long error_code)
 static void simd_math_error(void __user *ip)
 {
        struct task_struct *task;
-       unsigned short mxcsr;
        siginfo_t info;
+       unsigned short mxcsr;
 
        /*
         * Save the info for the exception handler and clear the error.