[TIPC]: Fix simple sparse warnings

Tried to run the new tipc stack through sparse.
Following patch fixes all cases where 0 was used
as replacement of NULL.
Use NULL to document this is a pointer and to silence sparse.

This brough sparse warning count down with 127 to 24 warnings.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Per Liden <per.liden@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/net/tipc/ref.h b/net/tipc/ref.h
index 4f8f9f40dcac..6d20006be45b 100644
--- a/net/tipc/ref.h
+++ b/net/tipc/ref.h
@@ -92,7 +92,7 @@ static inline void *tipc_ref_lock(u32 ref)
                         return r->object;
                 spin_unlock_bh(&r->lock);
         }
-        return 0;
+        return NULL;
 }
 
 /**
@@ -125,7 +125,7 @@ static inline void *tipc_ref_deref(u32 ref)
                 if (likely(r->data.reference == ref))
                         return r->object;
         }
-        return 0;
+        return NULL;
 }
 
 #endif