x86: dumpstack: Clean up the x86_stack_ids[][] initalization and other details

Make the initialization more readable, plus tidy up a few small
visual details as well.

No change in functionality.

LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 13 insertions, 12 deletions

diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c
index a071e6be177e..cfec478a4e42 100644
--- a/arch/x86/kernel/dumpstack_64.c
+++ b/arch/x86/kernel/dumpstack_64.c
@@ -10,26 +10,28 @@
 #include <linux/module.h>
 #include <linux/ptrace.h>
 #include <linux/kexec.h>
+#include <linux/sysfs.h>
 #include <linux/bug.h>
 #include <linux/nmi.h>
-#include <linux/sysfs.h>
 
 #include <asm/stacktrace.h>
 
 #include "dumpstack.h"
 
+#define N_EXCEPTION_STACKS_END \
+                (N_EXCEPTION_STACKS + DEBUG_STKSZ/EXCEPTION_STKSZ - 2)
 
 static char x86_stack_ids[][8] = {
-                [DEBUG_STACK - 1] = "#DB",
-                [NMI_STACK - 1] = "NMI",
-                [DOUBLEFAULT_STACK - 1] = "#DF",
-                [STACKFAULT_STACK - 1] = "#SS",
-                [MCE_STACK - 1] = "#MC",
+                [ DEBUG_STACK-1                 ]       = "#DB",
+                [ NMI_STACK-1                   ]       = "NMI",
+                [ DOUBLEFAULT_STACK-1           ]       = "#DF",
+                [ STACKFAULT_STACK-1            ]       = "#SS",
+                [ MCE_STACK-1                   ]       = "#MC",
 #if DEBUG_STKSZ > EXCEPTION_STKSZ
-                [N_EXCEPTION_STACKS ...
-                        N_EXCEPTION_STACKS + DEBUG_STKSZ / EXCEPTION_STKSZ - 2] = "#DB[?]"
+                [ N_EXCEPTION_STACKS ...
+                  N_EXCEPTION_STACKS_END        ]       = "#DB[?]"
 #endif
-        };
+};
 
 int x86_is_stack_id(int id, char *name)
 {
@@ -37,7 +39,7 @@ int x86_is_stack_id(int id, char *name)
 }
 
 static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack,
-                                        unsigned *usedp, char **idp)
+                                         unsigned *usedp, char **idp)
 {
         unsigned k;
 
@@ -202,7 +204,7 @@ EXPORT_SYMBOL(dump_trace);
 
 void
 show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
-                unsigned long *sp, unsigned long bp, char *log_lvl)
+                   unsigned long *sp, unsigned long bp, char *log_lvl)
 {
         unsigned long *stack;
         int i;
@@ -303,4 +305,3 @@ int is_valid_bugaddr(unsigned long ip)
 
         return ud2 == 0x0b0f;
 }
-