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    Subject[patch 22/22] setup_per_zone_pages_min(): take zone->lock instead of zone->lru_lock
    2.6.27-stable review patch.  If anyone has any objections, please let us know.

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

    From: Gerald Schaefer <gerald.schaefer@de.ibm.com>

    commit 1125b4e3949949b44a7c80b619507c6f61d62911 upstream.

    This replaces zone->lru_lock in setup_per_zone_pages_min() with zone->lock.
    There seems to be no need for the lru_lock anymore, but there is a need for
    zone->lock instead, because that function may call move_freepages() via
    setup_zone_migrate_reserve().

    Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
    Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
    Tested-by: Yasunori Goto <y-goto@jp.fujitsu.com>
    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>

    ---
    mm/page_alloc.c | 4 ++--
    1 file changed, 2 insertions(+), 2 deletions(-)

    --- a/mm/page_alloc.c
    +++ b/mm/page_alloc.c
    @@ -4224,7 +4224,7 @@ void setup_per_zone_pages_min(void)
    for_each_zone(zone) {
    u64 tmp;

    - spin_lock_irqsave(&zone->lru_lock, flags);
    + spin_lock_irqsave(&zone->lock, flags);
    tmp = (u64)pages_min * zone->present_pages;
    do_div(tmp, lowmem_pages);
    if (is_highmem(zone)) {
    @@ -4256,7 +4256,7 @@ void setup_per_zone_pages_min(void)
    zone->pages_low = zone->pages_min + (tmp >> 2);
    zone->pages_high = zone->pages_min + (tmp >> 1);
    setup_zone_migrate_reserve(zone);
    - spin_unlock_irqrestore(&zone->lru_lock, flags);
    + spin_unlock_irqrestore(&zone->lock, flags);
    }

    /* update totalreserve_pages */


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