[PATCH] kexec, x86: Fix x86 build warnings

[Baoquan He]

On 10/16/13 at 02:25pm, WANG Chao wrote:
> Gcc throw out three warnings:
> 
> kexec/arch/i386/kexec-elf-x86.c: In function ‘elf_x86_load’:
> kexec/arch/i386/kexec-elf-x86.c:97:6: warning: variable ‘modified_cmdline_len’ set but not used [-Wunused-but-set-variable]
>   int modified_cmdline_len;
>       ^
> kexec/arch/i386/kexec-bzImage.c: In function ‘do_bzImage_load’:
> kexec/arch/i386/kexec-bzImage.c:110:8: warning: variable ‘kernel_version’ set but not used [-Wunused-but-set-variable]
>   char *kernel_version;
>         ^
> kexec/arch/i386/kexec-x86-common.c: In function ‘efi_map_added’:
> kexec/arch/i386/kexec-x86-common.c:400:18: warning: variable ‘res’ set but not used [-Wunused-but-set-variable]
>   char buf[512], *res;
>                   ^
> Fix these warnings by remove the unused variables for good.
> 
> Signed-off-by: WANG Chao <chaowang at redhat.com>
> ---
>  kexec/arch/i386/kexec-bzImage.c    | 2 --
>  kexec/arch/i386/kexec-elf-x86.c    | 3 ---
>  kexec/arch/i386/kexec-x86-common.c | 4 ++--
>  3 files changed, 2 insertions(+), 7 deletions(-)
> 
> diff --git a/kexec/arch/i386/kexec-bzImage.c b/kexec/arch/i386/kexec-bzImage.c
> index fc1a54f..15c1b34 100644
> --- a/kexec/arch/i386/kexec-bzImage.c
> +++ b/kexec/arch/i386/kexec-bzImage.c
> @@ -107,7 +107,6 @@ int do_bzImage_load(struct kexec_info *info,
>  	struct x86_linux_header setup_header;
>  	struct x86_linux_param_header *real_mode;
>  	int setup_sects;
> -	char *kernel_version;
>  	size_t size;
>  	int kern16_size;
>  	unsigned long setup_base, setup_size;
> @@ -133,7 +132,6 @@ int do_bzImage_load(struct kexec_info *info,
>  	}
>  
>  	kern16_size = (setup_sects +1) *512;
> -	kernel_version = ((char *)&setup_header) + 512 + setup_header.kver_addr;
>  	if (kernel_len < kern16_size) {
>  		fprintf(stderr, "BzImage truncated?\n");
>  		return -1;
> diff --git a/kexec/arch/i386/kexec-elf-x86.c b/kexec/arch/i386/kexec-elf-x86.c
> index d0f9838..de00dcb 100644
> --- a/kexec/arch/i386/kexec-elf-x86.c
> +++ b/kexec/arch/i386/kexec-elf-x86.c
> @@ -94,7 +94,6 @@ int elf_x86_load(int argc, char **argv, const char *buf, off_t len,
>  	char *error_msg = NULL;
>  	int result;
>  	int command_line_len;
> -	int modified_cmdline_len;

I grep this varialbe and found ppc64 ported this code block, then this
varialbe isn't used either. Could you please remove it too?


>  	const char *ramdisk;
>  	unsigned long entry, max_addr;
>  	int arg_style;
> @@ -123,7 +122,6 @@ int elf_x86_load(int argc, char **argv, const char *buf, off_t len,
>  	 * Parse the command line arguments
>  	 */
>  	arg_style = ARG_STYLE_ELF;
> -	modified_cmdline_len = 0;
>  	ramdisk = 0;
>  	result = 0;
>  	while((opt = getopt_long(argc, argv, short_options, options, 0)) != -1) {
> @@ -180,7 +178,6 @@ int elf_x86_load(int argc, char **argv, const char *buf, off_t len,
>  						COMMAND_LINE_SIZE);
>  			modified_cmdline[COMMAND_LINE_SIZE - 1] = '\0';
>  		}
> -		modified_cmdline_len = strlen(modified_cmdline);
>  	}
>  
>  	/* Load the ELF executable */
> diff --git a/kexec/arch/i386/kexec-x86-common.c b/kexec/arch/i386/kexec-x86-common.c
> index ed6c950..e5aa2a4 100644
> --- a/kexec/arch/i386/kexec-x86-common.c
> +++ b/kexec/arch/i386/kexec-x86-common.c
> @@ -397,10 +397,10 @@ again:
>   * @return 1 if parameter is present, 0 if not or if an error occurs.
>   */
>  int efi_map_added( void ) {
> -	char buf[512], *res;
> +	char buf[512];
>  	FILE *fp = fopen( "/proc/cmdline", "r" );
>  	if( fp ) {
> -		res = fgets( buf, 512, fp );
> +		fgets( buf, 512, fp );
>  		fclose( fp );
>  		return strstr( buf, "add_efi_memmap" ) != NULL;
>  	} else {
> -- 
> 1.8.3.1
> 
> 
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