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Tue, 12 May 2026 10:59:32 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.87.85.9]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 12 May 2026 10:59:32 +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 Subject: [PATCH 1/4] s390/bug: Provide ARCH_WARN_ASM for Rust WARN/BUG support Date: Tue, 12 May 2026 12:59:17 +0200 Message-ID: <20260512105920.2426293-2-japo@linux.ibm.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260512105920.2426293-1-japo@linux.ibm.com> References: <20260512105920.2426293-1-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-Authority-Analysis: v=2.4 cv=cPHQdFeN c=1 sm=1 tr=0 ts=6a030819 cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=NGcC8JguVDcA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=iQ6ETzBq9ecOQQE5vZCe:22 a=VnNF1IyMAAAA:8 a=F81QZrn2fL8uw8yBg3oA:9 X-Proofpoint-ORIG-GUID: ClCL0DXOOzJuKIGWUxhG3T9zNgCWcUBS X-Proofpoint-GUID: OzDshFBJiaKr-kYi7QD8co5-LoJH9Bq5 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTEyMDEwOSBTYWx0ZWRfX3SCVmdsc82Ow 3/ZZf+0YfxNzuMRNus8iGEQ/IvTlI905XYaJAJGhWWInI6KjXi4t4PYAus5NoFA0UoG4nJIM3Zb VuiTomc7FeL2sgxavbB/BjQpJt2i45lk0cYWyI0EgqzRsjhLTSVqCXrdemoBGcp8tPDHjXWMU+H a+WMBrDXdXHSXqUOmhKzWeBALycJLlVCS/m5q4cLw3Jkt6UwS03ml0G1tY7xSFxu6qZpv7/dv6Q +IJNf6b+ptS1ph9yFE4xPvbTAJNpOMmr1PAcRCkILtrWb7cL7kZXaXU2T7tq61Jr/2nZ2SCpnZt isTxPT+AojWnNj6DNfetXyFWQaLZT1d14yQpmh46JA4iHjFXkgoX53IjqfKI+UWhLq9jmS6zJnT ismhL1F6PE07XAe+BkudRNFcbaN5hdktpC/Gdsgihz0CSw5gUT+atpTM44jUAeJXuqPJC3eulgD hpeyzxtM6gKJCH2erJg== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-11_05,2026-05-08_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 bulkscore=0 phishscore=0 clxscore=1011 spamscore=0 impostorscore=0 lowpriorityscore=0 adultscore=0 suspectscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605050000 definitions=main-2605120109 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. 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 59017fd3d935..baaf5d571785 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 MONCODE_BUG(%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__ */ -- 2.51.0