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[2001:44b8:1113:6700:8c2c:9602:4cd1:9ff4]) by smtp.gmail.com with ESMTPSA id z18sm1157213pgi.68.2020.06.01.22.55.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 Jun 2020 22:55:31 -0700 (PDT) From: Daniel Axtens To: Andrew Morton , kbuild test robot Cc: kbuild-all@lists.01.org, Johannes Weiner , Dmitry Vyukov , Linux Memory Management List Subject: Re: [hnaz-linux-mm:master 169/698] include/linux/string.h:307:9: note: in expansion of macro '__underlying_strncpy' In-Reply-To: <87tuzuyvgt.fsf@dja-thinkpad.axtens.net> References: <202005301819.G4uARaFJ%lkp@intel.com> <20200601180455.1a2f38368da33c7a0bb8d6fb@linux-foundation.org> <87wo4qywp4.fsf@dja-thinkpad.axtens.net> <87tuzuyvgt.fsf@dja-thinkpad.axtens.net> Date: Tue, 02 Jun 2020 15:55:27 +1000 Message-ID: <87r1uyyptc.fsf@dja-thinkpad.axtens.net> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: 991C31A4A7 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam01 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: Huh, turns out that we do actually see a similar set of warnings before and after this patch, they're just different warnings as a consequence of my patch. Given that these warnings only show up at W=3D1, is there any point in further supressing them? Before ------ In function =E2=80=98strncpy=E2=80=99, inlined from =E2=80=98hdmi_spd_infoframe_init=E2=80=99 at /home/dja/dev= /linux/linux/drivers/video/hdmi.c:230:2: /home/dja/dev/linux/linux/include/linux/string.h:282:9: warning: =E2=80=98_= _builtin_strncpy=E2=80=99 specified bound 8 equals destination size [-Wstri= ngop-truncation] 282 | return __builtin_strncpy(p, q, size); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In function =E2=80=98strncpy=E2=80=99, inlined from =E2=80=98hdmi_spd_infoframe_init=E2=80=99 at /home/dja/dev= /linux/linux/drivers/video/hdmi.c:231:2: /home/dja/dev/linux/linux/include/linux/string.h:282:9: warning: =E2=80=98_= _builtin_strncpy=E2=80=99 specified bound 16 equals destination size [-Wstr= ingop-truncation] 282 | return __builtin_strncpy(p, q, size); After ----- In function =E2=80=98strncpy=E2=80=99, inlined from =E2=80=98hdmi_spd_infoframe_init=E2=80=99 at /home/dja/dev= /linux/linux/drivers/video/hdmi.c:230:2: /home/dja/dev/linux/linux/include/linux/string.h:297:30: warning: =E2=80=98= __builtin_strncpy=E2=80=99 specified bound 8 equals destination size [-Wstr= ingop-truncation] 297 | #define __underlying_strncpy __builtin_strncpy | ^ /home/dja/dev/linux/linux/include/linux/string.h:307:9: note: in expansion = of macro =E2=80=98__underlying_strncpy=E2=80=99 307 | return __underlying_strncpy(p, q, size); | ^~~~~~~~~~~~~~~~~~~~ In function =E2=80=98strncpy=E2=80=99, inlined from =E2=80=98hdmi_spd_infoframe_init=E2=80=99 at /home/dja/dev= /linux/linux/drivers/video/hdmi.c:231:2: /home/dja/dev/linux/linux/include/linux/string.h:297:30: warning: =E2=80=98= __builtin_strncpy=E2=80=99 specified bound 16 equals destination size [-Wst= ringop-truncation] 297 | #define __underlying_strncpy __builtin_strncpy | ^ /home/dja/dev/linux/linux/include/linux/string.h:307:9: note: in expansion = of macro =E2=80=98__underlying_strncpy=E2=80=99 307 | return __underlying_strncpy(p, q, size); | ^~~~~~~~~~~~~~~~~~~~