x86: 0 -> NULL, for arch/x86_64

When comparing a pointer, it's clearer to compare it to NULL than to 0.

[ tglx: arch/x86 adaptation ]

Signed-off-by: Yoann Padioleau <padator@wanadoo.fr>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: ak@suse.de
Cc: discuss@x86-64.org
Cc: akpm@linux-foundation.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
index 6da235522269..97e8ac75568f 100644
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -166,7 +166,7 @@ early_node_mem(int nodeid, unsigned long start, unsigned long end,
                 return __va(mem);
         ptr = __alloc_bootmem_nopanic(size,
                                 SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS));
-        if (ptr == 0) {
+        if (ptr == NULL) {
                 printk(KERN_ERR "Cannot find %lu bytes in node %d\n",
                         size, nodeid);
                 return NULL;