From: Maxime Ripard <maxime@cerno.tech> To: Arnd Bergmann <arnd@arndb.de> Cc: Naresh Kamboju <naresh.kamboju@linaro.org>, Linux ARM <linux-arm-kernel@lists.infradead.org>, open list <linux-kernel@vger.kernel.org>, regressions@lists.linux.dev, lkft-triage@lists.linaro.org, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, Andrew Morton <akpm@linux-foundation.org>, John Donnelly <john.p.donnelly@oracle.com>, Huacai Chen <chenhuacai@kernel.org>, Bjorn Andersson <bjorn.andersson@linaro.org>, Andy Shevchenko <andriy.shevchenko@linux.intel.com>, David Hildenbrand <david@redhat.com>, "Guilherme G. Piccoli" <gpiccoli@igalia.com>, Zhen Lei <thunder.leizhen@huawei.com>, Anshuman Khandual <anshuman.khandual@arm.com>, Kefeng Wang <wangkefeng.wang@huawei.com> Subject: Re: gcc-12: build errors: arch/arm64/kernel/setup.c:225:56: warning: array subscript -1 is outside array bounds of 'char[]' [-Warray-bounds] Date: Mon, 6 Jun 2022 11:01:29 +0200 [thread overview] Message-ID: <20220606090129.mpidmwwobgkcfc2v@houat> (raw) In-Reply-To: <CAK8P3a3QKWxqGore3+_DJnWo7bJgvDhkZjtkyg5EUg4_D=mE2w@mail.gmail.com> [-- Attachment #1: Type: text/plain, Size: 773 bytes --] Hi, On Fri, Jun 03, 2022 at 09:40:07AM +0200, Arnd Bergmann wrote: > On Fri, Jun 3, 2022 at 4:03 AM Naresh Kamboju <naresh.kamboju@linaro.org> wrote: > > inlined from 'setup_arch' at arch/arm64/kernel/setup.c:350:2: > > arch/arm64/kernel/setup.c:225:56: warning: array subscript -1 is > > outside array bounds of 'char[]' [-Warray-bounds] > > 225 | kernel_code.end = __pa_symbol(__init_begin - 1); > > > > Is this the only warning of this type that you get for arm64? In that function, both kernel_code.end and kernel_data_end show a similar warning in 5.19-rc1 > I think the easy fix would be to reword this line to > > kernel_code.end = __pa_symbol(__init_begin) - 1; Doing this for both fix the warnings. Maxime [-- Attachment #2: signature.asc --] [-- Type: application/pgp-signature, Size: 228 bytes --]
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From: Maxime Ripard <maxime@cerno.tech> To: Arnd Bergmann <arnd@arndb.de> Cc: Naresh Kamboju <naresh.kamboju@linaro.org>, Linux ARM <linux-arm-kernel@lists.infradead.org>, open list <linux-kernel@vger.kernel.org>, regressions@lists.linux.dev, lkft-triage@lists.linaro.org, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, Andrew Morton <akpm@linux-foundation.org>, John Donnelly <john.p.donnelly@oracle.com>, Huacai Chen <chenhuacai@kernel.org>, Bjorn Andersson <bjorn.andersson@linaro.org>, Andy Shevchenko <andriy.shevchenko@linux.intel.com>, David Hildenbrand <david@redhat.com>, "Guilherme G. Piccoli" <gpiccoli@igalia.com>, Zhen Lei <thunder.leizhen@huawei.com>, Anshuman Khandual <anshuman.khandual@arm.com>, Kefeng Wang <wangkefeng.wang@huawei.com> Subject: Re: gcc-12: build errors: arch/arm64/kernel/setup.c:225:56: warning: array subscript -1 is outside array bounds of 'char[]' [-Warray-bounds] Date: Mon, 6 Jun 2022 11:01:29 +0200 [thread overview] Message-ID: <20220606090129.mpidmwwobgkcfc2v@houat> (raw) In-Reply-To: <CAK8P3a3QKWxqGore3+_DJnWo7bJgvDhkZjtkyg5EUg4_D=mE2w@mail.gmail.com> [-- Attachment #1.1: Type: text/plain, Size: 773 bytes --] Hi, On Fri, Jun 03, 2022 at 09:40:07AM +0200, Arnd Bergmann wrote: > On Fri, Jun 3, 2022 at 4:03 AM Naresh Kamboju <naresh.kamboju@linaro.org> wrote: > > inlined from 'setup_arch' at arch/arm64/kernel/setup.c:350:2: > > arch/arm64/kernel/setup.c:225:56: warning: array subscript -1 is > > outside array bounds of 'char[]' [-Warray-bounds] > > 225 | kernel_code.end = __pa_symbol(__init_begin - 1); > > > > Is this the only warning of this type that you get for arm64? In that function, both kernel_code.end and kernel_data_end show a similar warning in 5.19-rc1 > I think the easy fix would be to reword this line to > > kernel_code.end = __pa_symbol(__init_begin) - 1; Doing this for both fix the warnings. Maxime [-- Attachment #1.2: signature.asc --] [-- Type: application/pgp-signature, Size: 228 bytes --] [-- Attachment #2: Type: text/plain, Size: 176 bytes --] _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-06-06 9:01 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-06-03 2:03 gcc-12: build errors: arch/arm64/kernel/setup.c:225:56: warning: array subscript -1 is outside array bounds of 'char[]' [-Warray-bounds] Naresh Kamboju 2022-06-03 2:03 ` Naresh Kamboju 2022-06-03 7:40 ` Arnd Bergmann 2022-06-03 7:40 ` Arnd Bergmann 2022-06-06 9:01 ` Maxime Ripard [this message] 2022-06-06 9:01 ` Maxime Ripard 2022-06-06 9:41 ` Mark Rutland 2022-06-06 9:41 ` Mark Rutland 2022-06-08 6:54 ` Arnd Bergmann 2022-06-08 6:54 ` Arnd Bergmann
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