linux-kernel - Re: [PATCH -fixes] mm: Add a call to flush_cache_vmap() in vmap

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Message-Id: <20230809114651.eb690e5bd4c60b075eb3111b@linux-foundation.org>
Date:   Wed, 9 Aug 2023 11:46:51 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Alexandre Ghiti <alexghiti@...osinc.com>
Cc:     Uladzislau Rezki <urezki@...il.com>,
        Christoph Hellwig <hch@...radead.org>,
        Lorenzo Stoakes <lstoakes@...il.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Dylan Jhong <dylan@...estech.com>
Subject: Re: [PATCH -fixes] mm: Add a call to flush_cache_vmap() in
 vmap_pfn()

On Wed,  9 Aug 2023 18:46:33 +0200 Alexandre Ghiti <alexghiti@...osinc.com> wrote:

> flush_cache_vmap() must be called after new vmalloc mappings are
> installed in the page table in order to allow architectures to make sure
> the new mapping is visible.

Thanks.  What are the user-visible effects of this bug?