linux-kernel - Re: [PATCH v6 06/12] powerpc: inline huge vmap supported functions

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Message-Id: <20200821131522.c819f9c5c1fc24d90244c6dd@linux-foundation.org>
Date:   Fri, 21 Aug 2020 13:15:22 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Nicholas Piggin <npiggin@...il.com>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        linux-arch@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        Zefan Li <lizefan@...wei.com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Christoph Hellwig <hch@...radead.org>,
        Christophe Leroy <christophe.leroy@...roup.eu>
Subject: Re: [PATCH v6 06/12] powerpc: inline huge vmap supported functions

On Sat, 22 Aug 2020 01:12:10 +1000 Nicholas Piggin <npiggin@...il.com> wrote:

>  #ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
> -bool arch_vmap_p4d_supported(pgprot_t prot);
> -bool arch_vmap_pud_supported(pgprot_t prot);
> -bool arch_vmap_pmd_supported(pgprot_t prot);
> +static inline bool arch_vmap_p4d_supported(pgprot_t prot)
> +{
> +	return false;
> +}
> +
> +static inline bool arch_vmap_pud_supported(pgprot_t prot)
> +{
> +	/* HPT does not cope with large pages in the vmalloc area */
> +	return radix_enabled();
> +}
> +
> +static inline bool arch_vmap_pmd_supported(pgprot_t prot)
> +{
> +	return radix_enabled();
> +}
>  #endif

Oh.  OK, whatever ;)