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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
78 lines
1.7 KiB
C
78 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/thread_info.h>
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#include <asm/smp.h>
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#include <xen/events.h>
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#include "xen-ops.h"
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#include "smp.h"
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static void __init xen_hvm_smp_prepare_boot_cpu(void)
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{
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BUG_ON(smp_processor_id() != 0);
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native_smp_prepare_boot_cpu();
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/*
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* Setup vcpu_info for boot CPU. Secondary CPUs get their vcpu_info
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* in xen_cpu_up_prepare_hvm().
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*/
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xen_vcpu_setup(0);
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/*
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* The alternative logic (which patches the unlock/lock) runs before
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* the smp bootup up code is activated. Hence we need to set this up
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* the core kernel is being patched. Otherwise we will have only
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* modules patched but not core code.
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*/
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xen_init_spinlocks();
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}
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static void __init xen_hvm_smp_prepare_cpus(unsigned int max_cpus)
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{
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int cpu;
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native_smp_prepare_cpus(max_cpus);
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WARN_ON(xen_smp_intr_init(0));
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xen_init_lock_cpu(0);
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for_each_possible_cpu(cpu) {
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if (cpu == 0)
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continue;
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/* Set default vcpu_id to make sure that we don't use cpu-0's */
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per_cpu(xen_vcpu_id, cpu) = XEN_VCPU_ID_INVALID;
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}
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}
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#ifdef CONFIG_HOTPLUG_CPU
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static void xen_hvm_cpu_die(unsigned int cpu)
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{
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if (common_cpu_die(cpu) == 0) {
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xen_smp_intr_free(cpu);
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xen_uninit_lock_cpu(cpu);
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xen_teardown_timer(cpu);
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}
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}
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#else
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static void xen_hvm_cpu_die(unsigned int cpu)
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{
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BUG();
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}
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#endif
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void __init xen_hvm_smp_init(void)
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{
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if (!xen_have_vector_callback)
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return;
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smp_ops.smp_prepare_cpus = xen_hvm_smp_prepare_cpus;
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smp_ops.smp_send_reschedule = xen_smp_send_reschedule;
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smp_ops.cpu_die = xen_hvm_cpu_die;
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smp_ops.send_call_func_ipi = xen_smp_send_call_function_ipi;
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smp_ops.send_call_func_single_ipi = xen_smp_send_call_function_single_ipi;
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smp_ops.smp_prepare_boot_cpu = xen_hvm_smp_prepare_boot_cpu;
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smp_ops.smp_cpus_done = xen_smp_cpus_done;
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}
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