Linux kernel stable tree (mirror) https://git.radix-linux.su/kernel/linux.git/atom?h=linux-7.0.y 2025-07-28T06:01:23+00:00 2025-07-28T06:01:23+00:00 Ingo Molnar mingo@kernel.org 2025-05-15T12:46:38+00:00 urn:sha1:d6b894cbfa4b91e2a7eaf5bc0a91cac48c5f4311 Extend WARN_ON and BUG_ON style output from: WARNING: CPU: 0 PID: 0 at kernel/sched/core.c:8511 sched_init+0x20/0x410 to: WARNING: CPU: 0 PID: 0 at [idx < 0 && ptr] kernel/sched/core.c:8511 sched_init+0x20/0x410 Note that the output will be further reorganized later in this series. [ peterz: backmerge fix from Nathan ] Fixed-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> # Cleaned up tags section Cc: Huacai Chen <chenhuacai@kernel.org> Cc: Josh Poimboeuf <jpoimboe@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: WANG Xuerui <kernel@xen0n.name> Cc: linux-arch@vger.kernel.org Link: https://lore.kernel.org/r/20250515124644.2958810-10-mingo@kernel.org Link: https://lore.kernel.org/r/20250616-loongarch-fix-warn-cond-llvm-ias-v1-1-6c6d90bb4466@kernel.org 2025-06-13T08:25:32+00:00 Ingo Molnar mingo@kernel.org 2025-05-15T12:46:37+00:00 urn:sha1:66e94df0dd272b057899b8cdbca906ea1306d7a1 Pass in the condition string from __WARN_FLAGS(), but don't use it yet. Signed-off-by: Ingo Molnar <mingo@kernel.org> Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: Josh Poimboeuf <jpoimboe@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: WANG Xuerui <kernel@xen0n.name> Cc: linux-arch@vger.kernel.org Link: https://lore.kernel.org/r/20250515124644.2958810-9-mingo@kernel.org 2025-06-13T08:20:52+00:00 Ingo Molnar mingo@kernel.org 2025-05-15T12:46:30+00:00 urn:sha1:aec58b48517c911fbdf2beebba46a347e5910072 Push the new parameter down into every architecture that defines __WARN_FLAGS(): arm64 loongarch parisc powerpc riscv s390 sh x86 Don't pass anything substantial down yet, just propagate the new parameter with empty strings, without generating it or using it. ( The string is never NULL, so it can be concatenated at the preprocessor level. ) Signed-off-by: Ingo Molnar <mingo@kernel.org> Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: linux-arch@vger.kernel.org Link: https://lore.kernel.org/r/20250515124644.2958810-2-mingo@kernel.org 2024-12-02T11:01:44+00:00 Peter Zijlstra peterz@infradead.org 2024-11-28T09:39:06+00:00 urn:sha1:87116ae6da034242baf06e799f9f0e2a8ee6a796 Currently REACHABLE is weird for being on the instruction after the instruction it modifies. Since all REACHABLE annotations have an explicit instruction, flip them around. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Josh Poimboeuf <jpoimboe@kernel.org> Link: https://lore.kernel.org/r/20241128094312.494176035@infradead.org 2024-12-02T11:01:44+00:00 Peter Zijlstra peterz@infradead.org 2024-11-28T09:39:05+00:00 urn:sha1:e7a174fb43d24adca066e82d1cb9fdee092d48d1 Suggested-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Josh Poimboeuf <jpoimboe@kernel.org> Link: https://lore.kernel.org/r/20241128094312.353431347@infradead.org 2024-12-02T11:01:44+00:00 Peter Zijlstra peterz@infradead.org 2024-11-28T09:39:03+00:00 urn:sha1:624bde3465f660e54a7cd4c1efc3e536349fead5 annotate_reachable() is unreliable since the compiler is free to place random code inbetween two consecutive asm() statements. This removes the last and only annotate_reachable() user. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Josh Poimboeuf <jpoimboe@kernel.org> Link: https://lore.kernel.org/r/20241128094312.133437051@infradead.org 2024-03-11T14:23:47+00:00 Tiezhu Yang yangtiezhu@loongson.cn 2024-03-11T14:23:47+00:00 urn:sha1:cb8a2ef0848ca80d67d6d56e2df757cfdf6b3355 The kernel CONFIG_UNWINDER_ORC option enables the ORC unwinder, which is similar in concept to a DWARF unwinder. The difference is that the format of the ORC data is much simpler than DWARF, which in turn allows the ORC unwinder to be much simpler and faster. The ORC data consists of unwind tables which are generated by objtool. After analyzing all the code paths of a .o file, it determines information about the stack state at each instruction address in the file and outputs that information to the .orc_unwind and .orc_unwind_ip sections. The per-object ORC sections are combined at link time and are sorted and post-processed at boot time. The unwinder uses the resulting data to correlate instruction addresses with their stack states at run time. Most of the logic are similar with x86, in order to get ra info before ra is saved into stack, add ra_reg and ra_offset into orc_entry. At the same time, modify some arch-specific code to silence the objtool warnings. Co-developed-by: Jinyang He <hejinyang@loongson.cn> Signed-off-by: Jinyang He <hejinyang@loongson.cn> Co-developed-by: Youling Tang <tangyouling@loongson.cn> Signed-off-by: Youling Tang <tangyouling@loongson.cn> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> 2022-10-12T08:36:19+00:00 Youling Tang tangyouling@loongson.cn 2022-10-12T08:36:19+00:00 urn:sha1:2d2c395217d2233e752dbddcae3c5d94050b48c1 Inspired by commit 9fb7410f955("arm64/BUG: Use BRK instruction for generic BUG traps"), do similar for LoongArch to use generic BUG() handler. This patch uses the BREAK software breakpoint instruction to generate a trap instead, similarly to most other arches, with the generic BUG code generating the dmesg boilerplate. This allows bug metadata to be moved to a separate table and reduces the amount of inline code at BUG() and WARN() sites. This also avoids clobbering any registers before they can be dumped. To mitigate the size of the bug table further, this patch makes use of the existing infrastructure for encoding addresses within the bug table as 32-bit relative pointers instead of absolute pointers. (Note: this limits the max kernel size to 2GB.) Before patch: [ 3018.338013] lkdtm: Performing direct entry BUG [ 3018.342445] Kernel bug detected[#5]: [ 3018.345992] CPU: 2 PID: 865 Comm: cat Tainted: G D 6.0.0-rc6+ #35 After patch: [ 125.585985] lkdtm: Performing direct entry BUG [ 125.590433] ------------[ cut here ]------------ [ 125.595020] kernel BUG at drivers/misc/lkdtm/bugs.c:78! [ 125.600211] Oops - BUG[#1]: [ 125.602980] CPU: 3 PID: 410 Comm: cat Not tainted 6.0.0-rc6+ #36 Out-of-line file/line data information obtained compared to before. Signed-off-by: Youling Tang <tangyouling@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> 2022-06-03T12:09:28+00:00 Huacai Chen chenhuacai@loongson.cn 2022-05-31T10:04:11+00:00 urn:sha1:0603839b18f4fb3bffa82515efcf5b02084505ef Add the exception and interrupt handling machanism for basic LoongArch support. Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>