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[35.195.168.105]) by smtp.gmail.com with ESMTPSA id n10sm19413600wri.77.2021.06.22.02.22.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 22 Jun 2021 02:22:31 -0700 (PDT) Date: Tue, 22 Jun 2021 09:22:28 +0000 From: Quentin Perret To: Rob Herring Cc: Dong Aisheng , Stephen Boyd , Nicolas Boichat , KarimAllah Ahmed , linux-mm , "linux-kernel@vger.kernel.org" , Dong Aisheng , linux-arm-kernel , devicetree@vger.kernel.org Subject: Re: [PATCH 2/2] of: of_reserved_mem: mark nomap memory instead of removing Message-ID: References: <20210611131153.3731147-1-aisheng.dong@nxp.com> <20210611131153.3731147-2-aisheng.dong@nxp.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Authentication-Results: imf20.hostedemail.com; dkim=pass header.d=google.com header.s=20161025 header.b="nS/IsSEl"; dmarc=pass (policy=reject) header.from=google.com; spf=pass (imf20.hostedemail.com: domain of qperret@google.com designates 209.85.221.43 as permitted sender) smtp.mailfrom=qperret@google.com X-Rspamd-Server: rspam02 X-Stat-Signature: 7wq1hiuconnchuocb58zu5qgp1i3r6s7 X-Rspamd-Queue-Id: 1CEC21435 X-HE-Tag: 1624353752-125027 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000227, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Friday 11 Jun 2021 at 11:10:36 (-0600), Rob Herring wrote: > On Fri, Jun 11, 2021 at 7:13 AM Dong Aisheng wrote: > > > > Since commit 86588296acbf ("fdt: Properly handle "no-map" field in the memory region"), > > nomap memory is changed to call memblock_mark_nomap() instead of > > memblock_remove(). But it only changed the reserved memory with fixed > > addr and size case in early_init_dt_reserve_memory_arch(), not > > including the dynamical allocation by size case in > > early_init_dt_alloc_reserved_memory_arch(). > > > > Cc: Rob Herring > > Cc: devicetree@vger.kernel.org > > Good practice is to Cc the people involved in referenced commits. > Adding them now. This code is a minefield so I'd like other eyes on > it. Apologies for the delayed reply -- was away last week. I've been starring at this for 15 minutes, and still can't see how it could go wrong, so FWIW: Reviewed-by: Quentin Perret Thanks, Quentin > > Signed-off-by: Dong Aisheng > > --- > > drivers/of/of_reserved_mem.c | 4 ++-- > > 1 file changed, 2 insertions(+), 2 deletions(-) > > > > diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c > > index 367f298a83b2..ebba88395bf8 100644 > > --- a/drivers/of/of_reserved_mem.c > > +++ b/drivers/of/of_reserved_mem.c > > @@ -42,7 +42,7 @@ static int __init early_init_dt_alloc_reserved_memory_arch(phys_addr_t size, > > > > *res_base = base; > > if (nomap) > > - return memblock_remove(base, size); > > + return memblock_mark_nomap(base, size); > > > > return memblock_reserve(base, size); > > } > > @@ -276,7 +276,7 @@ void __init fdt_init_reserved_mem(void) > > pr_info("node %s compatible matching fail\n", > > rmem->name); > > if (nomap) > > - memblock_add(rmem->base, rmem->size); > > + memblock_clear_nomap(rmem->base, rmem->size); > > else > > memblock_free(rmem->base, rmem->size); > > } > > -- > > 2.25.1 > >