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

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To: Alexandre Ghiti <alexghiti@xxxxxxxxxxxx>
Subject: Re: [PATCH -fixes] mm: Add a call to flush_cache_vmap() in vmap_pfn()
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Date: Wed, 9 Aug 2023 11:46:51 -0700
Cc: Uladzislau Rezki <urezki@xxxxxxxxx>, Christoph Hellwig <hch@xxxxxxxxxxxxx>, Lorenzo Stoakes <lstoakes@xxxxxxxxx>, linux-mm@xxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Dylan Jhong <dylan@xxxxxxxxxxxxx>
In-reply-to: <20230809164633.1556126-1-alexghiti@rivosinc.com>
References: <20230809164633.1556126-1-alexghiti@rivosinc.com>

On Wed,  9 Aug 2023 18:46:33 +0200 Alexandre Ghiti <alexghiti@xxxxxxxxxxxx> 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?

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  - From: Alexandre Ghiti

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