powerpc/mm: Fix comparing pointer to 0 warning

Fixes coccicheck warning:

./arch/powerpc/mm/pgtable_32.c:87:11-12: WARNING comparing pointer to 0

Avoid pointer type value compared to 0.

Reported-by: Tosk Robot <tencent_os_robot@tencent.com>
Signed-off-by: Kaixu Xia <kaixuxia@tencent.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1604976961-20441-1-git-send-email-kaixuxia@tencent.com

diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
index 079159e97bca8df97e831d63e68c26b03f52ae53..888b9713a316126eff66a96e1be0f3e0806f5e92 100644 (file)
--- a/arch/powerpc/mm/pgtable_32.c
+++ b/arch/powerpc/mm/pgtable_32.c
@@ -84,7 +84,7 @@ int __ref map_kernel_page(unsigned long va, phys_addr_t pa, pgprot_t prot)
                pg = pte_alloc_kernel(pd, va);
        else
                pg = early_pte_alloc_kernel(pd, va);
-       if (pg != 0) {
+       if (pg) {
                err = 0;
                /* The PTE should never be already set nor present in the
                 * hash table