[PATCH] powerpc/fadump: Fix build error with CONFIG_PRESERVE_FA_DUMP=y

[Gustavo Romero]

On 7/27/20 4:03 AM, Michael Ellerman wrote:
> skiroot_defconfig fails:
> 
> arch/powerpc/kernel/fadump.c:48:17: error: ‘cpus_in_fadump’ defined but not used
>     48 | static atomic_t cpus_in_fadump;
> 
> Fix it by moving the definition into the #ifdef where it's used.
> 
> Fixes: ba608c4fa12c ("powerpc/fadump: fix race between pstore write and fadump crash trigger")
> Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>
> ---
>   arch/powerpc/kernel/fadump.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c
> index 1858896d6809..10ebb4bf71ad 100644
> --- a/arch/powerpc/kernel/fadump.c
> +++ b/arch/powerpc/kernel/fadump.c
> @@ -45,10 +45,12 @@ static struct fw_dump fw_dump;
>   static void __init fadump_reserve_crash_area(u64 base);
> 
>   struct kobject *fadump_kobj;
> -static atomic_t cpus_in_fadump;
> 
>   #ifndef CONFIG_PRESERVE_FA_DUMP
> +
> +static atomic_t cpus_in_fadump;
>   static DEFINE_MUTEX(fadump_mutex);
> +
>   struct fadump_mrange_info crash_mrange_info = { "crash", NULL, 0, 0, 0, false };
> 
>   #define RESERVED_RNGS_SZ	16384 /* 16K - 128 entries */
> 

Tested-by: Gustavo Romero <gromero at linux.ibm.com>


Thanks,
Gustavo