1 files changed, 4 insertions, 4 deletions

diff --git a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c
index b13c0555c3ba..bb8770a177b5 100644
--- a/arch/ia64/kernel/efi.c
+++ b/arch/ia64/kernel/efi.c
@@ -632,7 +632,7 @@ kern_memory_descriptor (unsigned long phys_addr)
                 if (phys_addr - md->start < (md->num_pages << EFI_PAGE_SHIFT))
                          return md;
         }
-        return 0;
+        return NULL;
 }
 
 static efi_memory_desc_t *
@@ -652,7 +652,7 @@ efi_memory_descriptor (unsigned long phys_addr)
                 if (phys_addr - md->phys_addr < (md->num_pages << EFI_PAGE_SHIFT))
                          return md;
         }
-        return 0;
+        return NULL;
 }
 
 u32
@@ -759,7 +759,7 @@ valid_phys_addr_range (unsigned long phys_addr, unsigned long size)
 }
 
 int
-valid_mmap_phys_addr_range (unsigned long phys_addr, unsigned long size)
+valid_mmap_phys_addr_range (unsigned long pfn, unsigned long size)
 {
         /*
          * MMIO regions are often missing from the EFI memory map.
@@ -923,7 +923,7 @@ find_memmap_space (void)
 void
 efi_memmap_init(unsigned long *s, unsigned long *e)
 {
-        struct kern_memdesc *k, *prev = 0;
+        struct kern_memdesc *k, *prev = NULL;
         u64     contig_low=0, contig_high=0;
         u64     as, ae, lim;
         void *efi_map_start, *efi_map_end, *p, *q;