linux-kernel - Re: [PATCH v2 11/11] mm/io-mapping: track

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Message-ID: <4ocgfjdoaoplnyrhkmjbgznxbhrwh2rbv5slhc4eajb5cspgzd@iz46mfzobysz>
Date: Tue, 13 May 2025 13:50:56 -0400
From: "Liam R. Howlett" <Liam.Howlett@...cle.com>
To: David Hildenbrand <david@...hat.com>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org, x86@...nel.org,
        intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-trace-kernel@...r.kernel.org,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
        Borislav Petkov <bp@...en8.de>, "H. Peter Anvin" <hpa@...or.com>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Tvrtko Ursulin <tursulin@...ulin.net>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
        Vlastimil Babka <vbabka@...e.cz>, Jann Horn <jannh@...gle.com>,
        Pedro Falcato <pfalcato@...e.de>, Peter Xu <peterx@...hat.com>,
        Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH v2 11/11] mm/io-mapping: track_pfn() -> "pfnmap tracking"

* David Hildenbrand <david@...hat.com> [250512 08:35]:
> track_pfn() does not exist, let's simply refer to it as "pfnmap
> tracking".
> 
> Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
> Acked-by: Ingo Molnar <mingo@...nel.org> # x86 bits
> Signed-off-by: David Hildenbrand <david@...hat.com>

Reviewed-by: Liam R. Howlett <Liam.Howlett@...cle.com>

> ---
>  mm/io-mapping.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mm/io-mapping.c b/mm/io-mapping.c
> index f44a6a1347123..d3586e95c12c5 100644
> --- a/mm/io-mapping.c
> +++ b/mm/io-mapping.c
> @@ -24,7 +24,7 @@ int io_mapping_map_user(struct io_mapping *iomap, struct vm_area_struct *vma,
>  	pgprot_t remap_prot = __pgprot((pgprot_val(iomap->prot) & _PAGE_CACHE_MASK) |
>  				       (pgprot_val(vma->vm_page_prot) & ~_PAGE_CACHE_MASK));
>  
> -	/* We rely on prevalidation of the io-mapping to skip track_pfn(). */
> +	/* We rely on prevalidation of the io-mapping to skip pfnmap tracking. */
>  	return remap_pfn_range_notrack(vma, addr, pfn, size, remap_prot);
>  }
>  EXPORT_SYMBOL_GPL(io_mapping_map_user);
> -- 
> 2.49.0
>