diff options
author | Ingo Molnar <mingo@kernel.org> | 2020-10-09 08:55:17 +0200 |
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committer | Ingo Molnar <mingo@kernel.org> | 2020-10-09 08:55:17 +0200 |
commit | e705d397965811ac528d7213b42d74ffe43caf38 (patch) | |
tree | 8a5bbe85cc42e64992b97859976e307027f83e33 /arch/x86/kernel/apic/vector.c | |
parent | d89d5f855f84ccf3f7e648813b4bb95c780bd7cd (diff) | |
parent | baffd723e44dc3d7f84f0b8f1fe1ece00ddd2710 (diff) |
Merge branch 'locking/urgent' into locking/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/apic/vector.c')
-rw-r--r-- | arch/x86/kernel/apic/vector.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c index dae32d948bf2..f8a56b5dc29f 100644 --- a/arch/x86/kernel/apic/vector.c +++ b/arch/x86/kernel/apic/vector.c @@ -161,6 +161,7 @@ static void apic_update_vector(struct irq_data *irqd, unsigned int newvec, apicd->move_in_progress = true; apicd->prev_vector = apicd->vector; apicd->prev_cpu = apicd->cpu; + WARN_ON_ONCE(apicd->cpu == newcpu); } else { irq_matrix_free(vector_matrix, apicd->cpu, apicd->vector, managed); @@ -910,7 +911,7 @@ void send_cleanup_vector(struct irq_cfg *cfg) __send_cleanup_vector(apicd); } -static void __irq_complete_move(struct irq_cfg *cfg, unsigned vector) +void irq_complete_move(struct irq_cfg *cfg) { struct apic_chip_data *apicd; @@ -918,15 +919,16 @@ static void __irq_complete_move(struct irq_cfg *cfg, unsigned vector) if (likely(!apicd->move_in_progress)) return; - if (vector == apicd->vector && apicd->cpu == smp_processor_id()) + /* + * If the interrupt arrived on the new target CPU, cleanup the + * vector on the old target CPU. A vector check is not required + * because an interrupt can never move from one vector to another + * on the same CPU. + */ + if (apicd->cpu == smp_processor_id()) __send_cleanup_vector(apicd); } -void irq_complete_move(struct irq_cfg *cfg) -{ - __irq_complete_move(cfg, ~get_irq_regs()->orig_ax); -} - /* * Called from fixup_irqs() with @desc->lock held and interrupts disabled. */ |