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There are quite some switches which are used to determine the final interrupt delivery mode, as shown below: 1) Kconfig: CONFIG_X86_64; CONFIG_X86_LOCAL_APIC; CONFIG_x86_IO_APIC 2) Command line options: disable_apic; skip_ioapic_setup 3) CPU Capability: boot_cpu_has(X86_FEATURE_APIC) 4) MP table: smp_found_config 5) ACPI: acpi_lapic; acpi_ioapic; nr_ioapic These switches are disordered and scattered and there are also some dependencies between them. These make the code difficult to maintain and read. Construct a selector to unify them into a single function, then, Use this selector to get an interrupt delivery mode directly. Signed-off-by: Dou Liyang <douly.fnst@cn.fujitsu.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: yinghai@kernel.org Cc: bhe@redhat.com Link: https://lkml.kernel.org/r/1505293975-26005-2-git-send-email-douly.fnst@cn.fujitsu.com |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.