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    Subject[patch 58/74] generic-ipi: fix hotplug_cfd()
    2.6.30-stable review patch.  If anyone has any objections, please let us know.

    ------------------

    From: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>

    commit 69dd647f969c28d18de77e2153f30d05a1874571 upstream.

    Use CONFIG_HOTPLUG_CPU, not CONFIG_CPU_HOTPLUG

    When hot-unpluging a cpu, it will leak memory allocated at cpu hotplug,
    but only if CPUMASK_OFFSTACK=y, which is default to n.

    The bug was introduced by 8969a5ede0f9e17da4b943712429aef2c9bcd82b
    ("generic-ipi: remove kmalloc()").

    Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
    Cc: Ingo Molnar <mingo@elte.hu>
    Cc: Jens Axboe <jens.axboe@oracle.com>
    Cc: Nick Piggin <nickpiggin@yahoo.com.au>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Rusty Russell <rusty@rustcorp.com.au>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

    ---
    kernel/smp.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/kernel/smp.c
    +++ b/kernel/smp.c
    @@ -57,7 +57,7 @@ hotplug_cfd(struct notifier_block *nfb,
    return NOTIFY_BAD;
    break;

    -#ifdef CONFIG_CPU_HOTPLUG
    +#ifdef CONFIG_HOTPLUG_CPU
    case CPU_UP_CANCELED:
    case CPU_UP_CANCELED_FROZEN:




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