Eric Lee / smarc-fsl-linux-kernel

05 Sep, 2020

1 commit

  • e48c15b79   smp: Add source and destination CPUs to __call_single_data ... Browse Code »

    This commit adds a destination CPU to __call_single_data, and is inspired
    by an earlier commit by Peter Zijlstra. This version adds #ifdef to
    permit use by 32-bit systems and supplying the destination CPU for all
    smp_call_function*() requests, not just smp_call_function_single().

    If need be, 32-bit systems could be accommodated by shrinking the flags
    field to 16 bits (the atomic_t variant is currently unused) and by
    providing only eight bits for CPU on such systems.

    It is not clear that the addition of the fields to __call_single_node
    are really needed.

    [ paulmck: Apply Boqun Feng feedback on 32-bit builds. ]
    Link: https://lore.kernel.org/lkml/20200615164048.GC2531@hirez.programming.kicks-ass.net/
    Cc: Peter Zijlstra
    Cc: Ingo Molnar
    Cc: Thomas Gleixner
    Cc: Sebastian Andrzej Siewior
    Cc: Frederic Weisbecker
    Signed-off-by: Paul E. McKenney

    Paul E. McKenney
     

28 Jun, 2020

1 commit

  • 8c4890d1c   smp, irq_work: Continue smp_call_function*() and irq_work*() integration ... Browse Code »

    Instead of relying on BUG_ON() to ensure the various data structures
    line up, use a bunch of horrible unions to make it all automatic.

    Much of the union magic is to ensure irq_work and smp_call_function do
    not (yet) see the members of their respective data structures change
    name.

    Suggested-by: Linus Torvalds
    Signed-off-by: Peter Zijlstra (Intel)
    Signed-off-by: Ingo Molnar
    Reviewed-by: Frederic Weisbecker
    Link: https://lkml.kernel.org/r/20200622100825.844455025@infradead.org

    Peter Zijlstra