• A
    genirq: Provide irq_force_affinity fallback for non-SMP · 4c88d7f9
    Arnd Bergmann 提交于
    Patch 01f8fa4f "genirq: Allow forcing cpu affinity of interrupts" added
    an irq_force_affinity() function, and 30ccf03b "clocksource: Exynos_mct:
    Use irq_force_affinity() in cpu bringup" subsequently uses it. However, the
    driver can be used with CONFIG_SMP disabled, but the function declaration
    is only available for CONFIG_SMP, leading to this build error:
    
    drivers/clocksource/exynos_mct.c:431:3: error: implicit declaration of function 'irq_force_affinity' [-Werror=implicit-function-declaration]
       irq_force_affinity(mct_irqs[MCT_L0_IRQ + cpu], cpumask_of(cpu));
    
    This patch introduces a dummy helper function for the non-SMP case
    that always returns success, to get rid of the build error.
    Since the patches causing the problem are marked for stable backports,
    this one should be as well.
    Signed-off-by: NArnd Bergmann <arnd@arndb.de>
    Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
    Acked-by: NKukjin Kim <kgene.kim@samsung.com>
    Cc: stable@vger.kernel.org
    Link: http://lkml.kernel.org/r/5619084.0zmrrIUZLV@wuerfelSigned-off-by: NThomas Gleixner <tglx@linutronix.de>
    4c88d7f9
interrupt.h 18.9 KB