This avoids comparisons between signed and unsigned integers.

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

Index: kexec-tools/kexec/arch/sh/kexec-sh.c
===================================================================
--- kexec-tools.orig/kexec/arch/sh/kexec-sh.c	2010-02-01 23:07:20.000000000 +1100
+++ kexec-tools/kexec/arch/sh/kexec-sh.c	2010-02-01 23:07:22.000000000 +1100
@@ -164,10 +164,10 @@ char *get_append(void)
         return append_buf;
 }
 
-void kexec_sh_setup_zero_page(char *zero_page_buf, int zero_page_size,
+void kexec_sh_setup_zero_page(char *zero_page_buf, size_t zero_page_size,
 			      char *cmd_line)
 {
-	int n = zero_page_size - 0x100;
+	size_t n = zero_page_size - 0x100;
 
 	memset(zero_page_buf, 0, zero_page_size);
 
Index: kexec-tools/kexec/arch/sh/kexec-sh.h
===================================================================
--- kexec-tools.orig/kexec/arch/sh/kexec-sh.h	2010-02-01 23:06:38.000000000 +1100
+++ kexec-tools/kexec/arch/sh/kexec-sh.h	2010-02-01 23:07:22.000000000 +1100
@@ -23,7 +23,7 @@ int netbsd_sh_load(int argc, char **argv
 void netbsd_sh_usage(void);
 
 char *get_append(void);
-void kexec_sh_setup_zero_page(char *zero_page_buf, int zero_page_size,
+void kexec_sh_setup_zero_page(char *zero_page_buf, size_t zero_page_size,
 			      char *cmd_line);
 
 #endif /* KEXEC_SH_H */
Index: kexec-tools/kexec/arch/sh/kexec-zImage-sh.c
===================================================================
--- kexec-tools.orig/kexec/arch/sh/kexec-zImage-sh.c	2010-02-01 23:07:19.000000000 +1100
+++ kexec-tools/kexec/arch/sh/kexec-zImage-sh.c	2010-02-01 23:07:22.000000000 +1100
@@ -51,7 +51,7 @@ static unsigned long zImage_head32(const
  *
  * Make sure that the file image has a reasonable chance of working.
  */
-int zImage_sh_probe(const char *buf, off_t len)
+int zImage_sh_probe(const char *buf, off_t UNUSED(len))
 {
 	if (memcmp(&buf[0x202], "HdrS", 4) != 0)
 	        return -1;