From: kbuild test robot <lkp(a)intel.com&gt; arch/sparc/mm/srmmu.c:364:42-43: WARNING comparing pointer to 0 arch/sparc/mm/srmmu.c:364:42-43: 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 Fixes: c95be5b549d6 ("sparc32: mm: Change pgtable_t type to pte_t * instead of struct page *") CC: Will Deacon <will(a)kernel.org&gt; Signed-off-by: kbuild test robot <lkp(a)intel.com&gt; --- tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git locking/kcsan head: ffed638b6a2180da8fd002a46632d746af72b299 commit: c95be5b549d6af16e1f9b9307f745ef78a01d11c [4/21] sparc32: mm: Change pgtable_t type to pte_t * instead of struct page * srmmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/sparc/mm/srmmu.c +++ b/arch/sparc/mm/srmmu.c @@ -361,7 +361,7 @@ 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); if (!pgtable_pte_page_ctor(page)) {