1 files changed, 9 insertions, 38 deletions

diff --git a/arch/mips/kernel/kgdb.c b/arch/mips/kernel/kgdb.c
index eb6c0d582626..09a2d7bb9eef 100644
--- a/arch/mips/kernel/kgdb.c
+++ b/arch/mips/kernel/kgdb.c
@@ -32,7 +32,7 @@
 #include <asm/cacheflush.h>
 #include <asm/processor.h>
 #include <asm/sigcontext.h>
-#include <linux/uaccess.h>
+#include <asm/irq_regs.h>
 
 static struct hard_trap_info {
 	unsigned char tt;	/* Trap type code for MIPS R3xxx and R4xxx */
@@ -207,25 +207,6 @@ void arch_kgdb_breakpoint(void)
 		".set\treorder");
 }
 
-static void kgdb_call_nmi_hook(void *ignored)
-{
-	mm_segment_t old_fs;
-
-	old_fs = get_fs();
-	set_fs(get_ds());
-
-	kgdb_nmicallback(raw_smp_processor_id(), NULL);
-
-	set_fs(old_fs);
-}
-
-void kgdb_roundup_cpus(unsigned long flags)
-{
-	local_irq_enable();
-	smp_call_function(kgdb_call_nmi_hook, NULL, 0);
-	local_irq_disable();
-}
-
 static int compute_signal(int tt)
 {
 	struct hard_trap_info *ht;
@@ -308,7 +289,6 @@ static int kgdb_mips_notify(struct notifier_block *self, unsigned long cmd,
 	struct die_args *args = (struct die_args *)ptr;
 	struct pt_regs *regs = args->regs;
 	int trap = (regs->cp0_cause & 0x7c) >> 2;
-	mm_segment_t old_fs;
 
 #ifdef CONFIG_KPROBES
 	/*
@@ -323,17 +303,11 @@ static int kgdb_mips_notify(struct notifier_block *self, unsigned long cmd,
 	if (user_mode(regs))
 		return NOTIFY_DONE;
 
-	/* Kernel mode. Set correct address limit */
-	old_fs = get_fs();
-	set_fs(get_ds());
-
 	if (atomic_read(&kgdb_active) != -1)
 		kgdb_nmicallback(smp_processor_id(), regs);
 
-	if (kgdb_handle_exception(trap, compute_signal(trap), cmd, regs)) {
-		set_fs(old_fs);
+	if (kgdb_handle_exception(trap, compute_signal(trap), cmd, regs))
 		return NOTIFY_DONE;
-	}
 
 	if (atomic_read(&kgdb_setting_breakpoint))
 		if ((trap == 9) && (regs->cp0_epc == (unsigned long)breakinst))
@@ -343,7 +317,6 @@ static int kgdb_mips_notify(struct notifier_block *self, unsigned long cmd,
 	local_irq_enable();
 	__flush_cache_all();
 
-	set_fs(old_fs);
 	return NOTIFY_STOP;
 }
 
@@ -394,18 +367,16 @@ int kgdb_arch_handle_exception(int vector, int signo, int err_code,
 	return -1;
 }
 
-struct kgdb_arch arch_kgdb_ops;
+const struct kgdb_arch arch_kgdb_ops = {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+	.gdb_bpt_instr = { spec_op << 2, 0x00, 0x00, break_op },
+#else
+	.gdb_bpt_instr = { break_op, 0x00, 0x00, spec_op << 2 },
+#endif
+};
 
 int kgdb_arch_init(void)
 {
-	union mips_instruction insn = {
-		.r_format = {
-			.opcode = spec_op,
-			.func	= break_op,
-		}
-	};
-	memcpy(arch_kgdb_ops.gdb_bpt_instr, insn.byte, BREAK_INSTR_SIZE);
-
 	register_die_notifier(&kgdb_notifier);
 
 	return 0;