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+0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 892382CCF1F46; Thu, 12 Jan 2023 20:57:07 +0100 (CET) Message-ID: <20230112194314.845371875@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:14 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, 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sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.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, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com Subject: [PATCH v3 00/51] cpuidle,rcu: Clean up the mess X-Rspam-User: X-Rspamd-Server: rspam03 X-Stat-Signature: byx1z4oermkm43n8asjjh7gnh1mm4qgf X-Rspamd-Queue-Id: B4F5BA000A X-HE-Tag: 1673553445-580509 X-HE-Meta: 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kUQQPtbnArfHAF8l0KvOEEVXWxsJqYV2fPW9pDQxAc46o9P9IxaqrWzL3HUyAE1GctZ5PCG5shD8jzymzUgNX7UmHVgbHePFWj6qysmHXTotbcQd9paAgof9WM8lA6qJ5Lobx8yNSu/PyJ0Auuc0NuUGz2o+KWmzCSjjupIp6pg1gd86JpvPwSzvsk+Z1N/qiGBuTJpryniQCZaKjx63g97GcRg69mByQQheJa1blHC1w/7rOwXjg7n2KE0ipHnrOBxgMTgfOFEx5Rz4D23xMOoDhcqnO5QUxVLG1EBHqoShrUz8QukHQFI9norlp3FM+hU2DBq/8F1KEMUkmdOkjar/mJD0CEIgpy/TadzAtC+6QLYgKjsUPAHvE7nBRSA8EugxaTawIXmsjs5gepDd+3p31BHz3o9w+YyCSoRUdzgsYEUAb/F9aTA043LCSLA1qKRbIpykpQ3ZxslAMWki6eLO+s8obiKj5LJBM7SpwVF/sw9QOBLmEtK2ZxI6FOJcra7y5KikFmUbWx3z4TMkZOPKBnoO0LeupBh12GO+rHW9+RipJRKKsUtzwJA/DYYB4m4NQhHLr886ehMnnaSE30Lexh8/eEXBAhRFbiAfcvYaEaYsCXWp/2+8sYHP47QlQxOYDcTRw9UXRbAVJYkOVCMoChvjN3AganJDCtBM50I0sUl+mIeszq2MIGv6y0C6Wzibw3pzd85hY6zIAwSHo8q+ooymxlhFaAjQhlzXL3PzpGOkB5ylmIkRAwt2xs/40cgmZznpGC6ex8bU/a4SqhK+NTxqmDa8QUyEzhIEMELsRQf6+gNqBo3yELSGIj0PyQpGGegHZ91jdTycMNdds8FhwM58PRB8GKltfatZqSg6fOkQtf4WLNtM4NHe5wtvJVOPhpqMNEAaVXvXoTz0sp9kSug0I5vixNS8tiGH13pPjjEXq/mY2R8J+CQ6HX3zGwP9W1/MfuoHATmRpNqjSO53U3kwU +7DdrXG2 us7BjHTTbHiOjjYBMgEz03sz9xYFaIWZsjQ0lOFmiu+HL5X4maEkOs4V8xW5pcjPxc4v4nEEfkkq6khImNtyiDY1gqPjQPis2eIpVcDU7R/A== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hi All! The (hopefully) final respin of cpuidle vs rcu cleanup patches. Barring any objections I'll be queueing these patches in tip/sched/core in the next few days. v2: https://lkml.kernel.org/r/20220919095939.761690562@infradead.org These here patches clean up the mess that is cpuidle vs rcuidle. At the end of the ride there's only on RCU_NONIDLE user left: arch/arm64/kernel/suspend.c: RCU_NONIDLE(__cpu_suspend_exit()); And I know Mark has been prodding that with something sharp. The last version was tested by a number of people and I'm hoping to not have broken anything in the meantime ;-) Changes since v2: - rebased to v6.2-rc3; as available at: git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/idle - folded: https://lkml.kernel.org/r/Y3UBwYNY15ETUKy9@hirez.programming.kicks-ass.net which makes the ARM cpuidle index 0 consistently not use CPUIDLE_FLAG_RCU_IDLE, as requested by Ulf. - added a few more __always_inline to empty stub functions as found by the robot. - Used _RET_IP_ instead of _THIS_IP_ in a few placed because of: https://github.com/ClangBuiltLinux/linux/issues/263 - Added new patches to address various robot reports: #35: trace,hardirq: No moar _rcuidle() tracing #47: cpuidle: Ensure ct_cpuidle_enter() is always called from noinstr/__cpuidle #48: cpuidle,arch: Mark all ct_cpuidle_enter() callers __cpuidle #49: cpuidle,arch: Mark all regular cpuidle_state::enter methods __cpuidle #50: cpuidle: Comments about noinstr/__cpuidle #51: context_tracking: Fix noinstr vs KASAN --- arch/alpha/kernel/process.c | 1 - arch/alpha/kernel/vmlinux.lds.S | 1 - arch/arc/kernel/process.c | 3 ++ arch/arc/kernel/vmlinux.lds.S | 1 - arch/arm/include/asm/vmlinux.lds.h | 1 - arch/arm/kernel/cpuidle.c | 4 +- arch/arm/kernel/process.c | 1 - arch/arm/kernel/smp.c | 6 +-- arch/arm/mach-davinci/cpuidle.c | 4 +- arch/arm/mach-gemini/board-dt.c | 3 +- arch/arm/mach-imx/cpuidle-imx5.c | 4 +- arch/arm/mach-imx/cpuidle-imx6q.c | 8 ++-- arch/arm/mach-imx/cpuidle-imx6sl.c | 4 +- arch/arm/mach-imx/cpuidle-imx6sx.c | 9 ++-- arch/arm/mach-imx/cpuidle-imx7ulp.c | 4 +- arch/arm/mach-omap2/common.h | 6 ++- arch/arm/mach-omap2/cpuidle34xx.c | 16 ++++++- arch/arm/mach-omap2/cpuidle44xx.c | 29 +++++++------ arch/arm/mach-omap2/omap-mpuss-lowpower.c | 12 +++++- arch/arm/mach-omap2/pm.h | 2 +- arch/arm/mach-omap2/pm24xx.c | 51 +--------------------- arch/arm/mach-omap2/pm34xx.c | 14 +++++-- arch/arm/mach-omap2/pm44xx.c | 2 +- arch/arm/mach-omap2/powerdomain.c | 10 ++--- arch/arm/mach-s3c/cpuidle-s3c64xx.c | 5 +-- arch/arm64/kernel/cpuidle.c | 2 +- arch/arm64/kernel/idle.c | 1 - arch/arm64/kernel/smp.c | 4 +- arch/arm64/kernel/vmlinux.lds.S | 1 - arch/csky/kernel/process.c | 1 - arch/csky/kernel/smp.c | 2 +- arch/csky/kernel/vmlinux.lds.S | 1 - arch/hexagon/kernel/process.c | 1 - arch/hexagon/kernel/vmlinux.lds.S | 1 - arch/ia64/kernel/process.c | 1 + arch/ia64/kernel/vmlinux.lds.S | 1 - arch/loongarch/kernel/idle.c | 1 + arch/loongarch/kernel/vmlinux.lds.S | 1 - arch/m68k/kernel/vmlinux-nommu.lds | 1 - arch/m68k/kernel/vmlinux-std.lds | 1 - arch/m68k/kernel/vmlinux-sun3.lds | 1 - arch/microblaze/kernel/process.c | 1 - arch/microblaze/kernel/vmlinux.lds.S | 1 - arch/mips/kernel/idle.c | 14 +++---- arch/mips/kernel/vmlinux.lds.S | 1 - arch/nios2/kernel/process.c | 1 - arch/nios2/kernel/vmlinux.lds.S | 1 - arch/openrisc/kernel/process.c | 1 + arch/openrisc/kernel/vmlinux.lds.S | 1 - arch/parisc/kernel/process.c | 2 - arch/parisc/kernel/vmlinux.lds.S | 1 - arch/powerpc/kernel/idle.c | 5 +-- arch/powerpc/kernel/vmlinux.lds.S | 1 - arch/riscv/kernel/process.c | 1 - arch/riscv/kernel/vmlinux-xip.lds.S | 1 - arch/riscv/kernel/vmlinux.lds.S | 1 - arch/s390/kernel/idle.c | 1 - arch/s390/kernel/vmlinux.lds.S | 1 - arch/sh/kernel/idle.c | 1 + arch/sh/kernel/vmlinux.lds.S | 1 - arch/sparc/kernel/leon_pmc.c | 4 ++ arch/sparc/kernel/process_32.c | 1 - arch/sparc/kernel/process_64.c | 3 +- arch/sparc/kernel/vmlinux.lds.S | 1 - arch/um/kernel/dyn.lds.S | 1 - arch/um/kernel/process.c | 1 - arch/um/kernel/uml.lds.S | 1 - arch/x86/boot/compressed/vmlinux.lds.S | 1 + arch/x86/coco/tdx/tdcall.S | 15 +------ arch/x86/coco/tdx/tdx.c | 25 ++++------- arch/x86/events/amd/brs.c | 13 +++--- arch/x86/include/asm/fpu/xcr.h | 4 +- arch/x86/include/asm/irqflags.h | 11 ++--- arch/x86/include/asm/mwait.h | 14 +++---- arch/x86/include/asm/nospec-branch.h | 2 +- arch/x86/include/asm/paravirt.h | 6 ++- arch/x86/include/asm/perf_event.h | 2 +- arch/x86/include/asm/shared/io.h | 4 +- arch/x86/include/asm/shared/tdx.h | 1 - arch/x86/include/asm/special_insns.h | 8 ++-- arch/x86/include/asm/xen/hypercall.h | 2 +- arch/x86/kernel/cpu/bugs.c | 2 +- arch/x86/kernel/fpu/core.c | 4 +- arch/x86/kernel/paravirt.c | 14 ++++++- arch/x86/kernel/process.c | 65 ++++++++++++++-------------- arch/x86/kernel/vmlinux.lds.S | 1 - arch/x86/lib/memcpy_64.S | 5 +-- arch/x86/lib/memmove_64.S | 4 +- arch/x86/lib/memset_64.S | 4 +- arch/x86/xen/enlighten_pv.c | 2 +- arch/x86/xen/irq.c | 2 +- arch/xtensa/kernel/process.c | 1 + arch/xtensa/kernel/vmlinux.lds.S | 1 - drivers/acpi/processor_idle.c | 28 ++++++++----- drivers/base/power/runtime.c | 24 +++++------ drivers/clk/clk.c | 8 ++-- drivers/cpuidle/cpuidle-arm.c | 4 +- drivers/cpuidle/cpuidle-big_little.c | 12 ++++-- drivers/cpuidle/cpuidle-mvebu-v7.c | 13 ++++-- drivers/cpuidle/cpuidle-psci.c | 26 +++++------- drivers/cpuidle/cpuidle-qcom-spm.c | 4 +- drivers/cpuidle/cpuidle-riscv-sbi.c | 19 +++++---- drivers/cpuidle/cpuidle-tegra.c | 31 +++++++++----- drivers/cpuidle/cpuidle.c | 70 ++++++++++++++++++++++--------- drivers/cpuidle/dt_idle_states.c | 2 +- drivers/cpuidle/poll_state.c | 10 ++++- drivers/idle/intel_idle.c | 19 ++++----- drivers/perf/arm_pmu.c | 11 +---- drivers/perf/riscv_pmu_sbi.c | 8 +--- include/asm-generic/vmlinux.lds.h | 9 ++-- include/linux/clockchips.h | 4 +- include/linux/compiler_types.h | 18 +++++++- include/linux/cpu.h | 3 -- include/linux/cpuidle.h | 32 ++++++++++++++ include/linux/cpumask.h | 4 +- include/linux/percpu-defs.h | 2 +- include/linux/sched/idle.h | 40 +++++++++++++----- include/linux/thread_info.h | 18 +++++++- include/linux/tracepoint.h | 15 ++++++- kernel/context_tracking.c | 12 +++--- kernel/cpu_pm.c | 9 ---- kernel/printk/printk.c | 2 +- kernel/sched/idle.c | 47 ++++++--------------- kernel/time/tick-broadcast-hrtimer.c | 29 ++++++------- kernel/time/tick-broadcast.c | 6 ++- kernel/trace/trace.c | 3 ++ kernel/trace/trace_preemptirq.c | 50 ++++++---------------- lib/ubsan.c | 5 ++- mm/kasan/kasan.h | 4 ++ mm/kasan/shadow.c | 38 +++++++++++++++++ tools/objtool/check.c | 17 ++++++++ 131 files changed, 617 insertions(+), 523 deletions(-)