From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DBEE7C433EF for ; Wed, 17 Nov 2021 14:07:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BC8D061B93 for ; Wed, 17 Nov 2021 14:07:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238167AbhKQOKv (ORCPT ); Wed, 17 Nov 2021 09:10:51 -0500 Received: from foss.arm.com ([217.140.110.172]:57144 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233775AbhKQOKv (ORCPT ); Wed, 17 Nov 2021 09:10:51 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 504DCED1; Wed, 17 Nov 2021 06:07:52 -0800 (PST) Received: from lakrids.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.121.207.14]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id B92173F70D; Wed, 17 Nov 2021 06:07:49 -0800 (PST) From: Mark Rutland To: linux-arm-kernel@lists.infradead.org Cc: aou@eecs.berkeley.edu, borntraeger@de.ibm.com, bp@alien8.de, broonie@kernel.org, catalin.marinas@arm.com, dave.hansen@linux.intel.com, gor@linux.ibm.com, hca@linux.ibm.com, linux-kernel@vger.kernel.org, madvenka@linux.microsoft.com, mark.rutland@arm.com, mhiramat@kernel.org, mingo@redhat.com, mpe@ellerman.id.au, palmer@dabbelt.com, paul.walmsley@sifive.com, peterz@infradead.org, rostedt@goodmis.org, tglx@linutronix.de, will@kernel.org Subject: [PATCH 1/9] arch: Make ARCH_STACKWALK independent of STACKTRACE Date: Wed, 17 Nov 2021 14:07:29 +0000 Message-Id: <20211117140737.44420-2-mark.rutland@arm.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20211117140737.44420-1-mark.rutland@arm.com> References: <20211117140737.44420-1-mark.rutland@arm.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Peter Zijlstra Make arch_stack_walk() available for ARCH_STACKWALK architectures without it being entangled in STACKTRACE. Link: https://lore.kernel.org/lkml/20211022152104.356586621@infradead.org/ Signed-off-by: Peter Zijlstra (Intel) [Mark: rebase, drop unnecessary arm change] Signed-off-by: Mark Rutland Cc: Albert Ou Cc: Borislav Petkov Cc: Christian Borntraeger Cc: Dave Hansen Cc: Heiko Carstens Cc: Ingo Molnar Cc: Michael Ellerman Cc: Palmer Dabbelt Cc: Paul Walmsley Cc: Thomas Gleixner Cc: Vasily Gorbik --- arch/arm64/kernel/stacktrace.c | 4 ---- arch/powerpc/kernel/Makefile | 3 +-- arch/riscv/kernel/stacktrace.c | 4 ---- arch/s390/kernel/Makefile | 3 +-- arch/x86/kernel/Makefile | 2 +- include/linux/stacktrace.h | 35 ++++++++++++++++++----------------- 6 files changed, 21 insertions(+), 30 deletions(-) diff --git a/arch/arm64/kernel/stacktrace.c b/arch/arm64/kernel/stacktrace.c index 94f83cd44e50..e6ba6b000564 100644 --- a/arch/arm64/kernel/stacktrace.c +++ b/arch/arm64/kernel/stacktrace.c @@ -221,8 +221,6 @@ void show_stack(struct task_struct *tsk, unsigned long *sp, const char *loglvl) barrier(); } -#ifdef CONFIG_STACKTRACE - noinline notrace void arch_stack_walk(stack_trace_consume_fn consume_entry, void *cookie, struct task_struct *task, struct pt_regs *regs) @@ -241,5 +239,3 @@ noinline notrace void arch_stack_walk(stack_trace_consume_fn consume_entry, walk_stackframe(task, &frame, consume_entry, cookie); } - -#endif diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile index 0e3640e14eb1..992cdd03c376 100644 --- a/arch/powerpc/kernel/Makefile +++ b/arch/powerpc/kernel/Makefile @@ -47,7 +47,7 @@ obj-y := cputable.o syscalls.o \ udbg.o misc.o io.o misc_$(BITS).o \ of_platform.o prom_parse.o firmware.o \ hw_breakpoint_constraints.o interrupt.o \ - kdebugfs.o + kdebugfs.o stacktrace.o obj-y += ptrace/ obj-$(CONFIG_PPC64) += setup_64.o \ paca.o nvram_64.o note.o @@ -116,7 +116,6 @@ obj-$(CONFIG_OPTPROBES) += optprobes.o optprobes_head.o obj-$(CONFIG_KPROBES_ON_FTRACE) += kprobes-ftrace.o obj-$(CONFIG_UPROBES) += uprobes.o obj-$(CONFIG_PPC_UDBG_16550) += legacy_serial.o udbg_16550.o -obj-$(CONFIG_STACKTRACE) += stacktrace.o obj-$(CONFIG_SWIOTLB) += dma-swiotlb.o obj-$(CONFIG_ARCH_HAS_DMA_SET_MASK) += dma-mask.o diff --git a/arch/riscv/kernel/stacktrace.c b/arch/riscv/kernel/stacktrace.c index 0fcdc0233fac..201ee206fb57 100644 --- a/arch/riscv/kernel/stacktrace.c +++ b/arch/riscv/kernel/stacktrace.c @@ -139,12 +139,8 @@ unsigned long __get_wchan(struct task_struct *task) return pc; } -#ifdef CONFIG_STACKTRACE - noinline void arch_stack_walk(stack_trace_consume_fn consume_entry, void *cookie, struct task_struct *task, struct pt_regs *regs) { walk_stackframe(task, regs, consume_entry, cookie); } - -#endif /* CONFIG_STACKTRACE */ diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile index 80f500ffb55c..be8007f367aa 100644 --- a/arch/s390/kernel/Makefile +++ b/arch/s390/kernel/Makefile @@ -40,7 +40,7 @@ obj-y += sysinfo.o lgr.o os_info.o machine_kexec.o obj-y += runtime_instr.o cache.o fpu.o dumpstack.o guarded_storage.o sthyi.o obj-y += entry.o reipl.o relocate_kernel.o kdebugfs.o alternative.o obj-y += nospec-branch.o ipl_vmparm.o machine_kexec_reloc.o unwind_bc.o -obj-y += smp.o text_amode31.o +obj-y += smp.o text_amode31.o stacktrace.o extra-y += head64.o vmlinux.lds @@ -55,7 +55,6 @@ compat-obj-$(CONFIG_AUDIT) += compat_audit.o obj-$(CONFIG_COMPAT) += compat_linux.o compat_signal.o obj-$(CONFIG_COMPAT) += $(compat-obj-y) obj-$(CONFIG_EARLY_PRINTK) += early_printk.o -obj-$(CONFIG_STACKTRACE) += stacktrace.o obj-$(CONFIG_KPROBES) += kprobes.o obj-$(CONFIG_KPROBES) += kprobes_insn_page.o obj-$(CONFIG_FUNCTION_TRACER) += mcount.o ftrace.o diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile index 2ff3e600f426..6aef9ee28a39 100644 --- a/arch/x86/kernel/Makefile +++ b/arch/x86/kernel/Makefile @@ -84,7 +84,7 @@ obj-$(CONFIG_IA32_EMULATION) += tls.o obj-y += step.o obj-$(CONFIG_INTEL_TXT) += tboot.o obj-$(CONFIG_ISA_DMA_API) += i8237.o -obj-$(CONFIG_STACKTRACE) += stacktrace.o +obj-y += stacktrace.o obj-y += cpu/ obj-y += acpi/ obj-y += reboot.o diff --git a/include/linux/stacktrace.h b/include/linux/stacktrace.h index bef158815e83..97455880ac41 100644 --- a/include/linux/stacktrace.h +++ b/include/linux/stacktrace.h @@ -8,22 +8,6 @@ struct task_struct; struct pt_regs; -#ifdef CONFIG_STACKTRACE -void stack_trace_print(const unsigned long *trace, unsigned int nr_entries, - int spaces); -int stack_trace_snprint(char *buf, size_t size, const unsigned long *entries, - unsigned int nr_entries, int spaces); -unsigned int stack_trace_save(unsigned long *store, unsigned int size, - unsigned int skipnr); -unsigned int stack_trace_save_tsk(struct task_struct *task, - unsigned long *store, unsigned int size, - unsigned int skipnr); -unsigned int stack_trace_save_regs(struct pt_regs *regs, unsigned long *store, - unsigned int size, unsigned int skipnr); -unsigned int stack_trace_save_user(unsigned long *store, unsigned int size); -unsigned int filter_irq_stacks(unsigned long *entries, unsigned int nr_entries); - -/* Internal interfaces. Do not use in generic code */ #ifdef CONFIG_ARCH_STACKWALK /** @@ -76,8 +60,25 @@ int arch_stack_walk_reliable(stack_trace_consume_fn consume_entry, void *cookie, void arch_stack_walk_user(stack_trace_consume_fn consume_entry, void *cookie, const struct pt_regs *regs); +#endif /* CONFIG_ARCH_STACKWALK */ -#else /* CONFIG_ARCH_STACKWALK */ +#ifdef CONFIG_STACKTRACE +void stack_trace_print(const unsigned long *trace, unsigned int nr_entries, + int spaces); +int stack_trace_snprint(char *buf, size_t size, const unsigned long *entries, + unsigned int nr_entries, int spaces); +unsigned int stack_trace_save(unsigned long *store, unsigned int size, + unsigned int skipnr); +unsigned int stack_trace_save_tsk(struct task_struct *task, + unsigned long *store, unsigned int size, + unsigned int skipnr); +unsigned int stack_trace_save_regs(struct pt_regs *regs, unsigned long *store, + unsigned int size, unsigned int skipnr); +unsigned int stack_trace_save_user(unsigned long *store, unsigned int size); +unsigned int filter_irq_stacks(unsigned long *entries, unsigned int nr_entries); + +#ifndef CONFIG_ARCH_STACKWALK +/* Internal interfaces. Do not use in generic code */ struct stack_trace { unsigned int nr_entries, max_entries; unsigned long *entries; -- 2.11.0