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0cd39f4600
By using lockdep_assert_*() from seqlock.h, the spaghetti monster
attacked.
Attack back by reducing seqlock.h dependencies from two key high level headers:
- <linux/seqlock.h>: -Remove <linux/ww_mutex.h>
- <linux/time.h>: -Remove <linux/seqlock.h>
- <linux/sched.h>: +Add <linux/seqlock.h>
The price was to add it to sched.h ...
Core header fallout, we add direct header dependencies instead of gaining them
parasitically from higher level headers:
- <linux/dynamic_queue_limits.h>: +Add <asm/bug.h>
- <linux/hrtimer.h>: +Add <linux/seqlock.h>
- <linux/ktime.h>: +Add <asm/bug.h>
- <linux/lockdep.h>: +Add <linux/smp.h>
- <linux/sched.h>: +Add <linux/seqlock.h>
- <linux/videodev2.h>: +Add <linux/kernel.h>
Arch headers fallout:
- PARISC: <asm/timex.h>: +Add <asm/special_insns.h>
- SH: <asm/io.h>: +Add <asm/page.h>
- SPARC: <asm/timer_64.h>: +Add <uapi/asm/asi.h>
- SPARC: <asm/vvar.h>: +Add <asm/processor.h>, <asm/barrier.h>
-Remove <linux/seqlock.h>
- X86: <asm/fixmap.h>: +Add <asm/pgtable_types.h>
-Remove <asm/acpi.h>
There's also a bunch of parasitic header dependency fallout in .c files, not listed
separately.
[ mingo: Extended the changelog, split up & fixed the original patch. ]
Co-developed-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200804133438.GK2674@hirez.programming.kicks-ass.net
59 lines
1.3 KiB
C
59 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* HW NMI watchdog support
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*
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* started by Don Zickus, Copyright (C) 2010 Red Hat, Inc.
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*
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* Arch specific calls to support NMI watchdog
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*
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* Bits copied from original nmi.c file
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*
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*/
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#include <linux/thread_info.h>
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#include <asm/apic.h>
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#include <asm/nmi.h>
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#include <linux/cpumask.h>
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#include <linux/kdebug.h>
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#include <linux/notifier.h>
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#include <linux/kprobes.h>
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#include <linux/nmi.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#ifdef CONFIG_HARDLOCKUP_DETECTOR_PERF
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u64 hw_nmi_get_sample_period(int watchdog_thresh)
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{
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return (u64)(cpu_khz) * 1000 * watchdog_thresh;
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}
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#endif
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#ifdef arch_trigger_cpumask_backtrace
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static void nmi_raise_cpu_backtrace(cpumask_t *mask)
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{
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apic->send_IPI_mask(mask, NMI_VECTOR);
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}
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void arch_trigger_cpumask_backtrace(const cpumask_t *mask, bool exclude_self)
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{
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nmi_trigger_cpumask_backtrace(mask, exclude_self,
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nmi_raise_cpu_backtrace);
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}
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static int nmi_cpu_backtrace_handler(unsigned int cmd, struct pt_regs *regs)
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{
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if (nmi_cpu_backtrace(regs))
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return NMI_HANDLED;
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return NMI_DONE;
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}
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NOKPROBE_SYMBOL(nmi_cpu_backtrace_handler);
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static int __init register_nmi_cpu_backtrace_handler(void)
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{
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register_nmi_handler(NMI_LOCAL, nmi_cpu_backtrace_handler,
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0, "arch_bt");
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return 0;
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}
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early_initcall(register_nmi_cpu_backtrace_handler);
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#endif
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