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SubjectRe: [PATCH v2] kexec: fix warnig of crash_zero_bytes in crash.c
On 06/23/19 at 06:24am, Tiezhu Yang wrote:
> Fix the following sparse warning:
>
> arch/x86/kernel/crash.c:59:15:
> warning: symbol 'crash_zero_bytes' was not declared. Should it be static?
>
> First, make crash_zero_bytes static. In addition, crash_zero_bytes
> is used when CONFIG_KEXEC_FILE is set, so make it only available
> under CONFIG_KEXEC_FILE. Otherwise, if CONFIG_KEXEC_FILE is not set,
> the following warning will appear when make crash_zero_bytes static:
>
> arch/x86/kernel/crash.c:59:22:
> warning: ‘crash_zero_bytes’ defined but not used [-Wunused-variable]
>
> Fixes: dd5f726076cc ("kexec: support for kexec on panic using new system call")
> Signed-off-by: Tiezhu Yang <kernelpatch@126.com>
> Cc: Vivek Goyal <vgoyal@redhat.com>
> ---
> arch/x86/kernel/crash.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c
> index 576b2e1..f13480e 100644
> --- a/arch/x86/kernel/crash.c
> +++ b/arch/x86/kernel/crash.c
> @@ -56,7 +56,9 @@ struct crash_memmap_data {
> */
> crash_vmclear_fn __rcu *crash_vmclear_loaded_vmcss = NULL;
> EXPORT_SYMBOL_GPL(crash_vmclear_loaded_vmcss);
> -unsigned long crash_zero_bytes;
> +#ifdef CONFIG_KEXEC_FILE
> +static unsigned long crash_zero_bytes;
> +#endif
>
> static inline void cpu_crash_vmclear_loaded_vmcss(void)
> {
> --
> 1.8.3.1

Acked-by: Dave Young <dyoung@redhat.com>

Thanks
Dave

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