[PATCH] futex: s/0/NULL/ in pointer context

[Alexey Dobriyan]

Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxx>

Index: linux-2.6.10-bk11-warnings/kernel/futex.c
===================================================================
--- linux-2.6.10-bk11-warnings/kernel/futex.c	(revision 4)
+++ linux-2.6.10-bk11-warnings/kernel/futex.c	(revision 5)
@@ -236,7 +236,7 @@
  */
 static inline void get_key_refs(union futex_key *key)
 {
-	if (key->both.ptr != 0) {
+	if (key->both.ptr != NULL) {
 		if (key->both.offset & 1)
 			atomic_inc(&key->shared.inode->i_count);
 		else
@@ -250,7 +250,7 @@
  */
 static void drop_key_refs(union futex_key *key)
 {
-	if (key->both.ptr != 0) {
+	if (key->both.ptr != NULL) {
 		if (key->both.offset & 1)
 			iput(key->shared.inode);
 		else
@@ -445,7 +445,7 @@
 	/* In the common case we don't take the spinlock, which is nice. */
  retry:
 	lock_ptr = q->lock_ptr;
-	if (lock_ptr != 0) {
+	if (lock_ptr != NULL) {
 		spin_lock(lock_ptr);
 		/*
 		 * q->lock_ptr can change between reading it and
-
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