x86/bzimage: change the types from char * to void *

This allows to also change the types of image_base and image_start in the Dom0
builder from char * to void *.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>

xen/arch/x86/bzimage.c

@@ -9,9 +9,9 @@
 #include <xen/libelf.h>
 #include <asm/bzimage.h>
 
-static __init unsigned long output_length(char *image, unsigned long image_len)
+static __init unsigned long output_length(void *image, unsigned long image_len)
 {
-    return *(uint32_t *)&image[image_len - 4];
+    return *(uint32_t *)(image + image_len - 4);
 }
 
 struct __packed setup_header {
@@ -71,7 +71,7 @@ static __init int bzimage_check(struct setup_header *hdr, unsigned long len)
 
 static unsigned long __initdata orig_image_len;
 
-unsigned long __init bzimage_headroom(char *image_start,
+unsigned long __init bzimage_headroom(void *image_start,
                                       unsigned long image_length)
 {
     struct setup_header *hdr = (struct setup_header *)image_start;
@@ -104,7 +104,8 @@ unsigned long __init bzimage_headroom(char *image_start,
     return headroom;
 }
 
-int __init bzimage_parse(char *image_base, char **image_start, unsigned long *image_len)
+int __init bzimage_parse(void *image_base, void **image_start,
+                         unsigned long *image_len)
 {
     struct setup_header *hdr = (struct setup_header *)(*image_start);
     int err = bzimage_check(hdr, *image_len);

xen/arch/x86/domain_build.c

@@ -1034,9 +1034,9 @@ static int __init construct_dom0_pv(
     start_info_t *si;
     struct vcpu *v = d->vcpu[0];
     unsigned long long value;
-    char *image_base = bootstrap_map(image);
+    void *image_base = bootstrap_map(image);
     unsigned long image_len = image->mod_end;
-    char *image_start = image_base + image_headroom;
+    void *image_start = image_base + image_headroom;
     unsigned long initrd_len = initrd ? initrd->mod_end : 0;
     l4_pgentry_t *l4tab = NULL, *l4start = NULL;
     l3_pgentry_t *l3tab = NULL, *l3start = NULL;

xen/include/asm-x86/bzimage.h

@@ -3,9 +3,9 @@
 
 #include <xen/init.h>
 
-unsigned long bzimage_headroom(char *image_start, unsigned long image_length);
+unsigned long bzimage_headroom(void *image_start, unsigned long image_length);
 
-int bzimage_parse(char *image_base, char **image_start,
+int bzimage_parse(void *image_base, void **image_start,
                   unsigned long *image_len);
 
 #endif /* __X86_BZIMAGE_H__ */