Blackfin arch: Fix bug - kernel build with config kernel debugging with remote gdb fails

 Add some comment and fix duplicated VEC_EXCPT02

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

1 files changed, 9 insertions, 12 deletions

diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
index 89cff2c7e8b1..1a3c4daf557a 100644
--- a/arch/blackfin/kernel/traps.c
+++ b/arch/blackfin/kernel/traps.c
@@ -284,15 +284,6 @@ asmlinkage void trap_c(struct pt_regs *fp)
                         return;
                 else
                         break;
-#ifdef CONFIG_KGDB
-        case VEC_EXCPT02 :               /* gdb connection */
-                info.si_code = TRAP_ILLTRAP;
-                sig = SIGTRAP;
-                CHK_DEBUGGER_TRAP();
-                return;
-#else
-        /* 0x02 - User Defined, Caught by default */
-#endif
         /* 0x03 - User Defined, userspace stack overflow */
         case VEC_EXCPT03:
                 info.si_code = SEGV_STACKFLOW;
@@ -300,6 +291,14 @@ asmlinkage void trap_c(struct pt_regs *fp)
                 printk(KERN_NOTICE EXC_0x03(KERN_NOTICE));
                 CHK_DEBUGGER_TRAP_MAYBE();
                 break;
+        /* 0x02 - KGDB initial connection and break signal trap */
+        case VEC_EXCPT02:
+#ifdef CONFIG_KGDB
+                info.si_code = TRAP_ILLTRAP;
+                sig = SIGTRAP;
+                CHK_DEBUGGER_TRAP();
+                return;
+#endif
         /* 0x04 - User Defined */
         /* 0x05 - User Defined */
         /* 0x06 - User Defined */
@@ -312,11 +311,9 @@ asmlinkage void trap_c(struct pt_regs *fp)
         /* 0x0D - User Defined */
         /* 0x0E - User Defined */
         /* 0x0F - User Defined */
-        /*
-         * If we got here, it is most likely that someone was trying to use a
+        /* If we got here, it is most likely that someone was trying to use a
          * custom exception handler, and it is not actually installed properly
          */
-        case VEC_EXCPT02:
         case VEC_EXCPT04 ... VEC_EXCPT15:
                 info.si_code = ILL_ILLPARAOP;
                 sig = SIGILL;