The two-stage cast is because we really do want a 32bit integer value
from a 64bit pointer, and gcc assumes that we're making a mistake
if there is just one cast.

# powerpc64-unknown-linux-gnu-gcc --version
powerpc64-unknown-linux-gnu-gcc (GCC) 4.1.1
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

# make
kexec/arch/ppc64/kexec-elf-rel-ppc64.c: In function 'machine_apply_elf_rel':
kexec/arch/ppc64/kexec-elf-rel-ppc64.c:66: warning: cast from pointer to integer of different size

Signed-off-by: Simon Horman <horms@verge.net.au>

Index: kexec-tools/kexec/arch/ppc64/kexec-elf-rel-ppc64.c
===================================================================
--- kexec-tools.orig/kexec/arch/ppc64/kexec-elf-rel-ppc64.c	2010-02-01 23:06:38.000000000 +1100
+++ kexec-tools/kexec/arch/ppc64/kexec-elf-rel-ppc64.c	2010-02-01 23:07:21.000000000 +1100
@@ -63,7 +63,7 @@ void machine_apply_elf_rel(struct mem_eh
 		break;
 
 	case R_PPC64_REL32:
-		*(uint32_t *)location = value - (uint32_t)location;
+		*(uint32_t *)location = value - (uint32_t)(uint64_t)location;
 		break;
 
 	case R_PPC64_TOC: