linux-kernel - Re: [PATCH] xen: gntalloc.c: Convert kmap() to kmap_local

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Message-ID: <cc7e517a-b1e7-95f1-d230-a635f7d84ef5@suse.com>
Date:   Tue, 19 Apr 2022 11:16:31 +0200
From:   Juergen Gross <jgross@...e.com>
To:     Alaa Mohamed <eng.alaamohamedsoliman.am@...il.com>,
        outreachy@...ts.linux.dev
Cc:     boris.ostrovsky@...cle.com, sstabellini@...nel.org,
        xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org,
        ira.weiny@...el.com
Subject: Re: [PATCH] xen: gntalloc.c: Convert kmap() to kmap_local_page()

On 18.04.22 08:19, Alaa Mohamed wrote:
> The use of kmap() is being deprecated in favor of kmap_local_page()
> where it is feasible.
> 
> With kmap_local_page(), the mapping is per thread, CPU local and not
> globally visible. Therefore __del_gref() is a function
> where the use of kmap_local_page() in place of kmap() is correctly
> suited.
> 
> Signed-off-by: Alaa Mohamed <eng.alaamohamedsoliman.am@...il.com>

Reviewed-by: Juergen Gross <jgross@...e.com>


Juergen

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