[PATCH] sparc32: fix badzero.cocci warnings

[kernel test robot <lkp@intel.com>]

From: kernel test robot <lkp@intel.com>

arch/sparc/mm/srmmu.c:317:42-43: WARNING comparing pointer to 0
arch/sparc/mm/srmmu.c:317:42-43: WARNING comparing pointer to 0

 Compare pointer-typed values to NULL rather than 0

Semantic patch information:
 This makes an effort to choose between !x and x == NULL.  !x is used
 if it has previously been used with the function used to initialize x.
 This relies on type information.  More type information can be obtained
 using the option -all_includes and the option -I to specify an
 include path.

Generated by: scripts/coccinelle/null/badzero.cocci

CC: Sam Ravnborg <sam@ravnborg.org>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: kernel test robot <lkp@intel.com>
---

url:    https://github.com/0day-ci/linux/commits/Sam-Ravnborg/sparc32-sunset-sun4m-and-sun4d/20201219-025354
base:   https://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git for-next

 srmmu.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/sparc/mm/srmmu.c
+++ b/arch/sparc/mm/srmmu.c
@@ -314,7 +314,7 @@ pgtable_t pte_alloc_one(struct mm_struct
 	pte_t *ptep;
 	struct page *page;
 
-	if ((ptep = pte_alloc_one_kernel(mm)) == 0)
+	if ((ptep = pte_alloc_one_kernel(mm)) == NULL)
 		return NULL;
 	page = pfn_to_page(__nocache_pa((unsigned long)ptep) >> PAGE_SHIFT);
 	spin_lock(&mm->page_table_lock);