lockdep: simplify get_user_chars()

there's too much repetition of code..

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 24 insertions, 41 deletions

diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index 02e6e066d563..1b4ee3c0b789 100644
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -467,54 +467,37 @@ const char * __get_key_name(struct lockdep_subclass_key *key, char *str)
         return kallsyms_lookup((unsigned long)key, NULL, NULL, NULL, str);
 }
 
-void
-get_usage_chars(struct lock_class *class, char *c1, char *c2, char *c3,
-                                        char *c4, char *c5, char *c6)
+static inline unsigned long lock_flag(enum lock_usage_bit bit)
 {
-        *c1 = '.', *c2 = '.', *c3 = '.', *c4 = '.', *c5 = '.', *c6 = '.';
-
-        if (class->usage_mask & LOCKF_USED_IN_HARDIRQ)
-                *c1 = '+';
-        else
-                if (class->usage_mask & LOCKF_ENABLED_HARDIRQ)
-                        *c1 = '-';
-
-        if (class->usage_mask & LOCKF_USED_IN_SOFTIRQ)
-                *c2 = '+';
-        else
-                if (class->usage_mask & LOCKF_ENABLED_SOFTIRQ)
-                        *c2 = '-';
+        return 1UL << bit;
+}
 
-        if (class->usage_mask & LOCKF_ENABLED_HARDIRQ_READ)
-                *c3 = '-';
-        if (class->usage_mask & LOCKF_USED_IN_HARDIRQ_READ) {
-                *c3 = '+';
-                if (class->usage_mask & LOCKF_ENABLED_HARDIRQ_READ)
-                        *c3 = '?';
-        }
+static char get_usage_char(struct lock_class *class, enum lock_usage_bit bit)
+{
+        char c = '.';
 
-        if (class->usage_mask & LOCKF_ENABLED_SOFTIRQ_READ)
-                *c4 = '-';
-        if (class->usage_mask & LOCKF_USED_IN_SOFTIRQ_READ) {
-                *c4 = '+';
-                if (class->usage_mask & LOCKF_ENABLED_SOFTIRQ_READ)
-                        *c4 = '?';
+        if (class->usage_mask & lock_flag(bit + 2))
+                c = '+';
+        if (class->usage_mask & lock_flag(bit)) {
+                c = '-';
+                if (class->usage_mask & lock_flag(bit + 2))
+                        c = '?';
         }
 
-        if (class->usage_mask & LOCKF_USED_IN_RECLAIM_FS)
-                *c5 = '+';
-        else
-                if (class->usage_mask & LOCKF_ENABLED_RECLAIM_FS)
-                        *c5 = '-';
+        return c;
+}
 
-        if (class->usage_mask & LOCKF_ENABLED_RECLAIM_FS_READ)
-                *c6 = '-';
-        if (class->usage_mask & LOCKF_USED_IN_RECLAIM_FS_READ) {
-                *c6 = '+';
-                if (class->usage_mask & LOCKF_ENABLED_RECLAIM_FS_READ)
-                        *c6 = '?';
-        }
+void
+get_usage_chars(struct lock_class *class, char *c1, char *c2, char *c3,
+                                        char *c4, char *c5, char *c6)
+{
+        *c1 = get_usage_char(class, LOCK_USED_IN_HARDIRQ);
+        *c2 = get_usage_char(class, LOCK_USED_IN_SOFTITQ);
+        *c3 = get_usage_char(class, LOCK_USED_IN_HARDIRQ_READ);
+        *c4 = get_usage_char(class, LOCK_USED_IN_SOFTITQ_READ);
 
+        *c5 = get_usage_char(class, LOCK_USED_IN_RECLAIM_FS);
+        *c6 = get_usage_char(class, LOCK_USED_IN_RECLAIM_FS_READ);
 }
 
 static void print_lock_name(struct lock_class *class)