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[61.230.45.44]) by smtp.gmail.com with ESMTPSA id u3sm6866224pfm.144.2021.02.04.06.51.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 04 Feb 2021 06:51:36 -0800 (PST) From: Lecopzer Chen To: will@kernel.org Cc: akpm@linux-foundation.org, andreyknvl@google.com, ardb@kernel.org, aryabinin@virtuozzo.com, broonie@kernel.org, catalin.marinas@arm.com, dan.j.williams@intel.com, dvyukov@google.com, glider@google.com, gustavoars@kernel.org, kasan-dev@googlegroups.com, lecopzer.chen@mediatek.com, lecopzer@gmail.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-mm@kvack.org, linux@roeck-us.net, robin.murphy@arm.com, rppt@kernel.org, tyhicks@linux.microsoft.com, vincenzo.frascino@arm.com, yj.chiang@mediatek.com Subject: Re: [PATCH v2 2/4] arm64: kasan: abstract _text and _end to KERNEL_START/END Date: Thu, 4 Feb 2021 22:51:27 +0800 Message-Id: <20210204145127.75856-1-lecopzer@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210204124658.GB20468@willie-the-truck> References: <20210204124658.GB20468@willie-the-truck> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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 Sat, Jan 09, 2021 at 06:32:50PM +0800, Lecopzer Chen wrote: > > Arm64 provide defined macro for KERNEL_START and KERNEL_END, > > thus replace them by the abstration instead of using _text and _end. > >=20 > > Signed-off-by: Lecopzer Chen > > --- > > arch/arm64/mm/kasan_init.c | 6 +++--- > > 1 file changed, 3 insertions(+), 3 deletions(-) > >=20 > > diff --git a/arch/arm64/mm/kasan_init.c b/arch/arm64/mm/kasan_init.c > > index 39b218a64279..fa8d7ece895d 100644 > > --- a/arch/arm64/mm/kasan_init.c > > +++ b/arch/arm64/mm/kasan_init.c > > @@ -218,8 +218,8 @@ static void __init kasan_init_shadow(void) > > phys_addr_t pa_start, pa_end; > > u64 i; > > =20 > > - kimg_shadow_start =3D (u64)kasan_mem_to_shadow(_text) & PAGE_MASK; > > - kimg_shadow_end =3D PAGE_ALIGN((u64)kasan_mem_to_shadow(_end)); > > + kimg_shadow_start =3D (u64)kasan_mem_to_shadow(KERNEL_START) & PAGE= _MASK; > > + kimg_shadow_end =3D PAGE_ALIGN((u64)kasan_mem_to_shadow(KERNEL_END)= ); > > =20 > > mod_shadow_start =3D (u64)kasan_mem_to_shadow((void *)MODULES_VADDR= ); > > mod_shadow_end =3D (u64)kasan_mem_to_shadow((void *)MODULES_END); > > @@ -241,7 +241,7 @@ static void __init kasan_init_shadow(void) > > clear_pgds(KASAN_SHADOW_START, KASAN_SHADOW_END); > > =20 > > kasan_map_populate(kimg_shadow_start, kimg_shadow_end, > > - early_pfn_to_nid(virt_to_pfn(lm_alias(_text)))); > > + early_pfn_to_nid(virt_to_pfn(lm_alias(KERNEL_START)))); >=20 > To be honest, I think this whole line is pointless. We should be able t= o > pass NUMA_NO_NODE now that we're not abusing the vmemmap() allocator to > populate the shadow. Do we need to fix this in this series? it seems another topic. If not, should this patch be removed in this series? Thanks, Lecopzer