• Eric W. Biederman's avatar
    [PATCH] genirq: irq: generalize the check for HARDIRQ_BITS · 23d0b8b0
    Eric W. Biederman authored
    This patch adds support for systems that cannot receive every interrupt on a
    single cpu simultaneously, in the check to see if we have enough HARDIRQ_BITS.
    
    MAX_HARDIRQS_PER_CPU becomes the count of the maximum number of hardare
    generated interrupts per cpu.
    
    On architectures that support per cpu interrupt delivery this can be a
    significant space savings and scalability bonus.
    
    This patch adds support for systems that cannot receive every interrupt on
    Signed-off-by: default avatarEric W. Biederman <ebiederm@xmission.com>
    Cc: Ingo Molnar <mingo@elte.hu>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
    Cc: Rajesh Shah <rajesh.shah@intel.com>
    Cc: Andi Kleen <ak@muc.de>
    Cc: "Protasevich, Natalie" <Natalie.Protasevich@UNISYS.com>
    Cc: "Luck, Tony" <tony.luck@intel.com>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    23d0b8b0
hardirq.h 3.56 KB