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https://github.com/SerenityOS/serenity
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0482f4e117
Linux did the same thing 18 years ago and their reasons for the change are similar to ours - https://github.com/torvalds/linux/commit/7d12e78 Most interrupt handlers (i.e. IRQ handlers) never used the register state reference anywhere so there's simply no need of passing it around. I didn't measure the performance boost but surely this change can't make things worse anyway.
32 lines
807 B
C++
32 lines
807 B
C++
/*
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* Copyright (c) 2024, Idan Horowitz <idan.horowitz@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/Bus/USB/xHCI/xHCIInterrupter.h>
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namespace Kernel::USB {
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ErrorOr<NonnullOwnPtr<xHCIInterrupter>> xHCIInterrupter::create(xHCIController& controller, u16 interrupter_id)
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{
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auto irq = TRY(controller.allocate_irq(0));
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return TRY(adopt_nonnull_own_or_enomem(new (nothrow) xHCIInterrupter(controller, interrupter_id, irq)));
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}
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xHCIInterrupter::xHCIInterrupter(xHCIController& controller, u16 interrupter_id, u16 irq)
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: PCI::IRQHandler(controller, irq)
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, m_controller(controller)
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, m_interrupter_id(interrupter_id)
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{
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enable_irq();
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}
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bool xHCIInterrupter::handle_irq()
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{
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m_controller.handle_interrupt({}, m_interrupter_id);
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return true;
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}
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}
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