The consumer of the purgatory buffer, elf_rel_build_load()
expects a signed char buffer.

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

Index: kexec-tools/util/bin-to-hex.c
===================================================================
--- kexec-tools.orig/util/bin-to-hex.c	2010-02-01 23:06:39.000000000 +1100
+++ kexec-tools/util/bin-to-hex.c	2010-02-01 23:07:21.000000000 +1100
@@ -6,7 +6,7 @@ int main(int argc, char **argv)
 	int i;
 	const char *name = argv[1];
 	printf("#include <stddef.h>\n");
-	printf("const unsigned char %s[] = {\n", name);
+	printf("const char %s[] = {\n", name);
 	i = 0;
 	while((c = getchar()) != EOF) {
 		if ((i % 16) != 0) {
Index: kexec-tools/kexec/arch/i386/kexec-bzImage.c
===================================================================
--- kexec-tools.orig/kexec/arch/i386/kexec-bzImage.c	2010-02-01 23:07:19.000000000 +1100
+++ kexec-tools/kexec/arch/i386/kexec-bzImage.c	2010-02-01 23:07:21.000000000 +1100
@@ -200,10 +200,10 @@ int do_bzImage_load(struct kexec_info *i
 	 * overflow takes place while applying relocations.
 	 */
 	if (!real_mode_entry && relocatable_kernel)
-		elf_rel_build_load(info, &info->rhdr, (char *) purgatory, purgatory_size,
+		elf_rel_build_load(info, &info->rhdr, purgatory, purgatory_size,
 					0x3000, 0x7fffffff, -1, 0);
 	else
-		elf_rel_build_load(info, &info->rhdr, (char *) purgatory, purgatory_size,
+		elf_rel_build_load(info, &info->rhdr, purgatory, purgatory_size,
 					0x3000, 640*1024, -1, 0);
 	dbgprintf("Loaded purgatory at addr 0x%lx\n", info->rhdr.rel_addr);
 	/* The argument/parameter segment */
Index: kexec-tools/kexec/arch/i386/kexec-elf-x86.c
===================================================================
--- kexec-tools.orig/kexec/arch/i386/kexec-elf-x86.c	2010-02-01 23:07:15.000000000 +1100
+++ kexec-tools/kexec/arch/i386/kexec-elf-x86.c	2010-02-01 23:07:21.000000000 +1100
@@ -191,7 +191,7 @@ int elf_x86_load(int argc, char **argv, 
 	/* Do we want arguments? */
 	if (arg_style != ARG_STYLE_NONE) {
 		/* Load the setup code */
-		elf_rel_build_load(info, &info->rhdr, (char *) purgatory, purgatory_size,
+		elf_rel_build_load(info, &info->rhdr, purgatory, purgatory_size,
 			0, ULONG_MAX, 1, 0);
 	}
 	if (arg_style == ARG_STYLE_NONE) {
Index: kexec-tools/kexec/arch/i386/kexec-multiboot-x86.c
===================================================================
--- kexec-tools.orig/kexec/arch/i386/kexec-multiboot-x86.c	2010-02-01 23:07:19.000000000 +1100
+++ kexec-tools/kexec/arch/i386/kexec-multiboot-x86.c	2010-02-01 23:07:21.000000000 +1100
@@ -217,7 +217,7 @@ int multiboot_x86_load(int argc, char **
 	elf_exec_build_load(info, &ehdr, buf, len, 0);
 
 	/* Load the setup code */
-	elf_rel_build_load(info, &info->rhdr, (char *) purgatory, purgatory_size, 0,
+	elf_rel_build_load(info, &info->rhdr, purgatory, purgatory_size, 0,
 				ULONG_MAX, 1, 0);
 	
 	/* The first segment will contain the multiboot headers:
Index: kexec-tools/kexec/arch/ppc64/kexec-elf-ppc64.c
===================================================================
--- kexec-tools.orig/kexec/arch/ppc64/kexec-elf-ppc64.c	2010-02-01 23:07:19.000000000 +1100
+++ kexec-tools/kexec/arch/ppc64/kexec-elf-ppc64.c	2010-02-01 23:07:21.000000000 +1100
@@ -207,7 +207,7 @@ int elf_ppc64_load(int argc, char **argv
 	}
 
 	/* Add v2wrap to the current image */
-	elf_rel_build_load(info, &info->rhdr, (const char *)purgatory,
+	elf_rel_build_load(info, &info->rhdr, purgatory,
 				purgatory_size, 0, max_addr, 1, 0);
 
 	/* Add a ram-disk to the current image
Index: kexec-tools/kexec/kexec.h
===================================================================
--- kexec-tools.orig/kexec/kexec.h	2010-02-01 23:07:16.000000000 +1100
+++ kexec-tools/kexec/kexec.h	2010-02-01 23:07:21.000000000 +1100
@@ -226,7 +226,7 @@ extern void arch_reuse_initrd(void);
 
 extern int ifdown(void);
 
-extern unsigned char purgatory[];
+extern char purgatory[];
 extern size_t purgatory_size;
 
 #define BOOTLOADER "kexec"