Re: [PATCH 4/5] kernel/cpu.c: eliminate cpu_*_mask

[Rasmus Villemoes <linux@rasmusvillemoes.dk>]

Hi PPC maintainers

Can I get you to ack or nak this? It's a prerequisite for a minor
patch series for kernel/cpu.c and include/linux/cpumask.h of mine.

Thanks,
Rasmus

On Mon, Sep 28 2015, Rasmus Villemoes <linux@rasmusvillemoes.dk> wrote:

> Gah, I didn't check for struct members called cpu_online_mask :(
>
> PPC people: The issue is that I changed cpu_online_mask (and friends)
> from being "const struct cpumask *const" exported variables to macros
> with the same type and value (after exporting what they pointed to). But
> that conflicts with that identifier used in struct
> fadump_crash_info_header. Would you be ok with renaming that member to
> just "online_mask"? I think it would be
>
> Subject: [PATCH] ppc: rename cpu_online_mask member of struct
>  fadump_crash_info_header
>
> As preparation for eliminating the indirect access to the various
> global cpu_xyz_bits bitmaps via the pointer variables cpu_xyz_mask,
> rename the cpu_online_mask of struct fadump_crash_info_header to
> simply online_mask, to allow cpu_online_mask to become a macro.
>
> Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
> ---
>  arch/powerpc/include/asm/fadump.h | 2 +-
>  arch/powerpc/kernel/fadump.c      | 4 ++--
>  2 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/arch/powerpc/include/asm/fadump.h b/arch/powerpc/include/asm/fadump.h
> index 493e72f64b35..b4407d0add27 100644
> --- a/arch/powerpc/include/asm/fadump.h
> +++ b/arch/powerpc/include/asm/fadump.h
> @@ -191,7 +191,7 @@ struct fadump_crash_info_header {
>  	u64		elfcorehdr_addr;
>  	u32		crashing_cpu;
>  	struct pt_regs	regs;
> -	struct cpumask	cpu_online_mask;
> +	struct cpumask	online_mask;
>  };
>  
>  /* Crash memory ranges */
> diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c
> index 26d091a1a54c..3cb3b02a13dd 100644
> --- a/arch/powerpc/kernel/fadump.c
> +++ b/arch/powerpc/kernel/fadump.c
> @@ -415,7 +415,7 @@ void crash_fadump(struct pt_regs *regs, const char *str)
>  	else
>  		ppc_save_regs(&fdh->regs);
>  
> -	fdh->cpu_online_mask = *cpu_online_mask;
> +	fdh->online_mask = *cpu_online_mask;
>  
>  	/* Call ibm,os-term rtas call to trigger firmware assisted dump */
>  	rtas_os_term((char *)str);
> @@ -646,7 +646,7 @@ static int __init fadump_build_cpu_notes(const struct fadump_mem_struct *fdm)
>  		}
>  		/* Lower 4 bytes of reg_value contains logical cpu id */
>  		cpu = be64_to_cpu(reg_entry->reg_value) & FADUMP_CPU_ID_MASK;
> -		if (fdh && !cpumask_test_cpu(cpu, &fdh->cpu_online_mask)) {
> +		if (fdh && !cpumask_test_cpu(cpu, &fdh->online_mask)) {
>  			SKIP_TO_NEXT_CPU(reg_entry);
>  			continue;
>  		}