• Jiang Liu's avatar
    mm: make __free_pages_bootmem() only available at boot time · 170a5a7e
    Jiang Liu authored
    In order to simpilify management of totalram_pages and
    zone->managed_pages, make __free_pages_bootmem() only available at boot
    time.  With this change applied, __free_pages_bootmem() will only be
    used by bootmem.c and nobootmem.c at boot time, so mark it as __init.
    Other callers of __free_pages_bootmem() have been converted to use
    free_reserved_page(), which handles totalram_pages and
    zone->managed_pages in a safer way.
    
    This patch also fix a bug in free_pagetable() for x86_64, which should
    increase zone->managed_pages instead of zone->present_pages when freeing
    reserved pages.
    
    And now we have managed_pages_count_lock to protect totalram_pages and
    zone->managed_pages, so remove the redundant ppb_lock lock in
    put_page_bootmem().  This greatly simplifies the locking rules.
    Signed-off-by: default avatarJiang Liu <jiang.liu@huawei.com>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: "H. Peter Anvin" <hpa@zytor.com>
    Cc: Yinghai Lu <yinghai@kernel.org>
    Cc: Wen Congyang <wency@cn.fujitsu.com>
    Cc: Tang Chen <tangchen@cn.fujitsu.com>
    Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
    Cc: Mel Gorman <mel@csn.ul.ie>
    Cc: Minchan Kim <minchan@kernel.org>
    Cc: "Michael S. Tsirkin" <mst@redhat.com>
    Cc: <sworddragon2@aol.com>
    Cc: Arnd Bergmann <arnd@arndb.de>
    Cc: Catalin Marinas <catalin.marinas@arm.com>
    Cc: Chris Metcalf <cmetcalf@tilera.com>
    Cc: David Howells <dhowells@redhat.com>
    Cc: Geert Uytterhoeven <geert@linux-m68k.org>
    Cc: Jeremy Fitzhardinge <jeremy@goop.org>
    Cc: Jianguo Wu <wujianguo@huawei.com>
    Cc: Joonsoo Kim <js1304@gmail.com>
    Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
    Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
    Cc: Marek Szyprowski <m.szyprowski@samsung.com>
    Cc: Michel Lespinasse <walken@google.com>
    Cc: Rik van Riel <riel@redhat.com>
    Cc: Rusty Russell <rusty@rustcorp.com.au>
    Cc: Tejun Heo <tj@kernel.org>
    Cc: Will Deacon <will.deacon@arm.com>
    Cc: Russell King <rmk@arm.linux.org.uk>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    170a5a7e
memory_hotplug.c 47 KB