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Mon, 8 Jun 2026 18:14:56 +0000 (GMT) From: Jan Polensky To: hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, ojeda@kernel.org, peterz@infradead.org, jpoimboe@kernel.org, jbaron@akamai.com, aliceryhl@google.com Cc: borntraeger@linux.ibm.com, svens@linux.ibm.com, boqun@kernel.org, gary@garyguo.net, bjorn3_gh@protonmail.com, lossin@kernel.org, a.hindborg@kernel.org, tmgross@umich.edu, dakr@kernel.org, rostedt@goodmis.org, ardb@kernel.org, linux-s390@vger.kernel.org, rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, japo@linux.ibm.com (Jan Polensky) Subject: [PATCH v6 1/6] s390/bug: Provide ARCH_WARN_ASM for Rust WARN/BUG support Date: Mon, 8 Jun 2026 20:14:46 +0200 Message-ID: <20260608181451.3734956-2-japo@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260608181451.3734956-1-japo@linux.ibm.com> References: <20260608181451.3734956-1-japo@linux.ibm.com> Precedence: bulk X-Mailing-List: rust-for-linux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-ORIG-GUID: cqWWZqCMqnBHxHEqlw20X-eTaoDawo6w X-Proofpoint-GUID: tKqqsRX7M-TElpNUXI2VZEK0qEZMhIWp X-Authority-Analysis: v=2.4 cv=ZbEt8MVA c=1 sm=1 tr=0 ts=6a2706a5 cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=FelO9ux0wxsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=_2yia0w1AAAA:8 a=VwQbUJbxAAAA:8 a=VnNF1IyMAAAA:8 a=gpATZORf9AIJ6E5TQREA:9 a=4yAS8WwzZ1jAEY03B-5r:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjA4MDE3MCBTYWx0ZWRfX1MFDIxFyn6A+ nsbsK7/rYh0lui5yJjBXhaS8zFMFfA2dUPlrQL/pqWLiTCudOmRaW+2aIss+8Z1zkqzjgSQW672 h+sMmsUNQ/ftuFSVe3fA3qNBxD5Ps1CP6mYwT5jq358w0OMA7NGgrv9hvTR+X6Obu0y/m9H69xp k9P+P8gy17uiJ+1NJ51+AezJJwDfK4ZTOsaWnwqlUNzEPv458O63nvZc9XGN9tIBhVXAPxQQuTY OMrI7wEpnRD/4P+fsLlJx0eo+NKPRbpEMufgtj4hUlXYcF98eK5yeqZmT+5So60LqTQt7VDSZLR Pa8Z46v2htzL5RLkNX4+nnh2cKUYwnQXfGWv64kQvJ4NFOk4aHttsokTXBUmh55Mgk0aAlePT+2 9S4BlmvQ/EyRcOTXep5B9XR7FoVvnc1zpsb35hRQiF8GxBlnqG9w2G/CezkDIhwm2Kc8T8uM0wE 9LAXCwbxBGotnTqlyYg== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-08_04,2026-06-05_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 impostorscore=0 malwarescore=0 lowpriorityscore=0 clxscore=1015 adultscore=0 spamscore=0 priorityscore=1501 bulkscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605210000 definitions=main-2606080170 Rust WARN and BUG support relies on ARCH_WARN_ASM to emit __bug_table entries. On s390 the macro is missing, so Rust code cannot generate proper WARN/BUG metadata for the kernel's bug reporting infrastructure. Define ARCH_WARN_ASM to produce the same assembly sequence and __bug_table entry format as the existing s390 BUG handling, including the monitor call. Define ARCH_WARN_REACHABLE as empty since s390 does not provide reachability analysis for warning paths. Acked-by: Gary Guo Acked-by: Miguel Ojeda Acked-by: Heiko Carstens Signed-off-by: Jan Polensky --- arch/s390/include/asm/bug.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/s390/include/asm/bug.h b/arch/s390/include/asm/bug.h index 50a270edb020..2010342c97b1 100644 --- a/arch/s390/include/asm/bug.h +++ b/arch/s390/include/asm/bug.h @@ -4,6 +4,7 @@ #include #include +#include #define MONCODE_BUG _AC(0, U) #define MONCODE_BUG_ARG _AC(1, U) @@ -121,6 +122,17 @@ do { \ #define HAVE_ARCH_BUG_FORMAT #define HAVE_ARCH_BUG_FORMAT_ARGS +#define ARCH_WARN_ASM(file, line, flags, size) \ + ".section .rodata.str,\"aMS\",@progbits,1\n" \ + "9:\n" \ + ".asciz \"\"\n" /* Empty string for compatibility */ \ + ".previous\n" \ + "0:\n" \ + __stringify(mc 0(%r0),0) "\n" \ + __BUG_ENTRY("9b", file, line, flags, size) + +#define ARCH_WARN_REACHABLE + #endif /* CONFIG_BUG && CONFIG_CC_HAS_ASM_IMMEDIATE_STRINGS */ #endif /* __ASSEMBLER__ */ -- 2.53.0