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AJvYcCWQaIkrMSvzLce0pzuf/i7GAggwx7WrLAGJsb8inkXWMNS8CDPmmkU5Jdze0oBLlMaSgRxRSdV2t4yocARg4IRKMhVcg6xiDc7z353sNDipfU5UA4Y3RoP6nzAptzIdjnsMXjRh0nY3KAOIY186fNhlkY2vsipAamXL2NpJ1nHrR88qoqTQoCinUhUGPI800DqMt9U90HWQcGCl3CX7qzB/vcLssqJWNsuVqxL/GCD0dn+/aT1Xoe5B5IrkL0p0a3cSxzmeZtHtxU+WTkSxKDttTnTa/vyzSQ== X-Gm-Message-State: AOJu0YxXANmm2aaKketi727qJ+6EWJQpSSzVvLcLLdMFRseB7Bo1Fv52 eaNwwkD89rrw9/m71x9QCYq+r3Mr2vxE10zHym8CulH5UuWjLLUP5QJJOdTF X-Google-Smtp-Source: AGHT+IGjcPO5G+GnCGVDj4Jcw0R4zzS4LNLUn52exaX20Pa+MrIRq7GoxtzdXir/jkag847FtE7VIQ== X-Received: by 2002:a17:902:cec8:b0:1dd:7d6a:de4f with SMTP id d8-20020a170902cec800b001dd7d6ade4fmr939106plg.2.1710263018703; Tue, 12 Mar 2024 10:03:38 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id k17-20020a170902c41100b001d9edac54b1sm6398555plk.171.2024.03.12.10.03.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Mar 2024 10:03:38 -0700 (PDT) Sender: Guenter Roeck From: Guenter Roeck To: linux-kselftest@vger.kernel.org Cc: David Airlie , Arnd Bergmann , =?utf-8?q?Ma=C3=ADra_Canal?= , Dan Carpenter , Kees Cook , Daniel Diaz , David Gow , Arthur Grillo , Brendan Higgins , Naresh Kamboju , Maarten Lankhorst , Andrew Morton , Maxime Ripard , =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= , Daniel Vetter , Thomas Zimmermann , dri-devel@lists.freedesktop.org, kunit-dev@googlegroups.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, loongarch@lists.linux.dev, netdev@lists.linux.dev, Guenter Roeck Subject: [PATCH 11/14] s390: Add support for suppressing warning backtraces Date: Tue, 12 Mar 2024 10:03:06 -0700 Message-Id: <20240312170309.2546362-12-linux@roeck-us.net> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240312170309.2546362-1-linux@roeck-us.net> References: <20240312170309.2546362-1-linux@roeck-us.net> Precedence: bulk X-Mailing-List: linux-sh@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add name of functions triggering warning backtraces to the __bug_table object section to enable support for suppressing WARNING backtraces. To limit image size impact, the pointer to the function name is only added to the __bug_table section if both CONFIG_KUNIT and CONFIG_DEBUG_BUGVERBOSE are enabled. Otherwise, the __func__ assembly parameter is replaced with a (dummy) NULL parameter to avoid an image size increase due to unused __func__ entries (this is necessary because __func__ is not a define but a virtual variable). Signed-off-by: Guenter Roeck --- arch/s390/include/asm/bug.h | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/arch/s390/include/asm/bug.h b/arch/s390/include/asm/bug.h index aebe1e22c7be..01e2aa4069d7 100644 --- a/arch/s390/include/asm/bug.h +++ b/arch/s390/include/asm/bug.h @@ -8,19 +8,30 @@ #ifdef CONFIG_DEBUG_BUGVERBOSE +#if IS_ENABLED(CONFIG_KUNIT) +# define HAVE_BUG_FUNCTION +# define __BUG_FUNC_PTR " .long %0-.\n" +# define __BUG_FUNC __func__ +#else +# define __BUG_FUNC_PTR +# define __BUG_FUNC NULL +#endif /* IS_ENABLED(CONFIG_KUNIT) */ + #define __EMIT_BUG(x) do { \ asm_inline volatile( \ "0: mc 0,0\n" \ ".section .rodata.str,\"aMS\",@progbits,1\n" \ "1: .asciz \""__FILE__"\"\n" \ ".previous\n" \ - ".section __bug_table,\"awM\",@progbits,%2\n" \ + ".section __bug_table,\"awM\",@progbits,%3\n" \ "2: .long 0b-.\n" \ " .long 1b-.\n" \ - " .short %0,%1\n" \ - " .org 2b+%2\n" \ + __BUG_FUNC_PTR \ + " .short %1,%2\n" \ + " .org 2b+%3\n" \ ".previous\n" \ - : : "i" (__LINE__), \ + : : "i" (__BUG_FUNC), \ + "i" (__LINE__), \ "i" (x), \ "i" (sizeof(struct bug_entry))); \ } while (0)