staging/zram: Fix sparse warning 'Using plain integer as NULL pointer'

This patch fixes the warning generated by sparse: "Using plain integer
as NULL pointer" by replacing the offending 0s with NULL.

Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/staging/zram/xvmalloc.c b/drivers/staging/zram/xvmalloc.c
index 3fdbb8ada827..b64406739d05 100644
--- a/drivers/staging/zram/xvmalloc.c
+++ b/drivers/staging/zram/xvmalloc.c
@@ -187,7 +187,7 @@ static void insert_block(struct xv_pool *pool, struct page *page, u32 offset,
         slindex = get_index_for_insert(block->size);
         flindex = slindex / BITS_PER_LONG;
 
-        block->link.prev_page = 0;
+        block->link.prev_page = NULL;
         block->link.prev_offset = 0;
         block->link.next_page = pool->freelist[slindex].page;
         block->link.next_offset = pool->freelist[slindex].offset;
@@ -217,7 +217,7 @@ static void remove_block_head(struct xv_pool *pool,
 
         pool->freelist[slindex].page = block->link.next_page;
         pool->freelist[slindex].offset = block->link.next_offset;
-        block->link.prev_page = 0;
+        block->link.prev_page = NULL;
         block->link.prev_offset = 0;
 
         if (!pool->freelist[slindex].page) {
@@ -232,7 +232,7 @@ static void remove_block_head(struct xv_pool *pool,
                  */
                 tmpblock = get_ptr_atomic(pool->freelist[slindex].page,
                                 pool->freelist[slindex].offset, KM_USER1);
-                tmpblock->link.prev_page = 0;
+                tmpblock->link.prev_page = NULL;
                 tmpblock->link.prev_offset = 0;
                 put_ptr_atomic(tmpblock, KM_USER1);
         }