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d=linux-foundation.org; s=korg; t=1691606812; bh=8VUPwjOWYEE8WoNNGr3QrghG1LCxP6UkLxr+pnJhuFk=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=yIVM+8nIl0vsi4/PqcnzqN9bbpk+DS4PYrcZ2KQWHBIoeA/jjEElKS0+05FczTqvK wJ6Ncr19U0fuIvmzJbb9PXFjJ4xt42LoB22DvEQVnu5XVqcvwcJrrdxmXqSVbAKo8X 45m91JO+yHAPRRkeXvyJZbgZsRMn81bn1H4Q0Mik= Date: Wed, 9 Aug 2023 11:46:51 -0700 From: Andrew Morton To: Alexandre Ghiti Cc: Uladzislau Rezki , Christoph Hellwig , Lorenzo Stoakes , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Dylan Jhong Subject: Re: [PATCH -fixes] mm: Add a call to flush_cache_vmap() in vmap_pfn() Message-Id: <20230809114651.eb690e5bd4c60b075eb3111b@linux-foundation.org> In-Reply-To: <20230809164633.1556126-1-alexghiti@rivosinc.com> References: <20230809164633.1556126-1-alexghiti@rivosinc.com> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 12E431C0017 X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: 43ne3tcphok16m5kug7qpj7e9nfiz8s6 X-HE-Tag: 1691606813-401616 X-HE-Meta: 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 1NdLuIZP g5UPr8b2Lbcs+L3X91z3PFZhA/Y2Ieq+n7wxB9Q0Jxu3Ig7cSXhYNVjhpz7AEF60yDVLelprY7JlNSlKhpG4p5DjIRA++j6Se/wvlXpim10edV134qjjftanPQsmjFLKlu4vlZaYWYF/tmh3iWnQWMup9SNJS8bmyVHAnL39GFPk10KolWIYUCqyVDJgxDliAP7oMCiKCb5pQKB4ZXzDzQ8uwuom7AFQLKB3FP7430KUthh6IXQ+qTccdIlUn5WABXyM0NVYnvPzwVhSpDCJJQjHB6Z6gKp/26pknqX9JJa86lskAVKG06rYyhRxsKa8VI1Bj86vEKMMXqY9yKuAtl259iMb1Lt3ERM4KT+FGfk17Uf7xhYKmb9LJDVZXEQr+vvfvJnlbVw5+T1IKQrAiutMlHqeW8y+bnTyXkoFnNBaMZAFfqphRrdXyXQ== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, 9 Aug 2023 18:46:33 +0200 Alexandre Ghiti 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?