• Yinghai Lu's avatar
    bootmem: Separate out CONFIG_NO_BOOTMEM code into nobootmem.c · 09325873
    Yinghai Lu authored
    mm/bootmem.c contained code paths for both bootmem and no bootmem
    configurations.  They implement about the same set of APIs in
    different ways and as a result bootmem.c contains massive amount of
    Separate out CONFIG_NO_BOOTMEM code into mm/nobootmem.c.  As the
    common part is relatively small, duplicate them in nobootmem.c instead
    of creating a common file or ifdef'ing in bootmem.c.
    The followings are duplicated.
    * {min|max}_low_pfn, max_pfn, saved_max_pfn
    * free_bootmem_late()
    * ___alloc_bootmem()
    * __alloc_bootmem_low()
    The followings are applicable only to nobootmem and moved verbatim.
    * __free_pages_memory()
    * free_all_memory_core_early()
    The followings are not applicable to nobootmem and omitted in
    * reserve_bootmem_node()
    * reserve_bootmem()
    The rest split function bodies according to CONFIG_NO_BOOTMEM.
    Makefile is updated so that only either bootmem.c or nobootmem.c is
    built according to CONFIG_NO_BOOTMEM.
    This patch doesn't introduce any behavior change.
    -tj: Rewrote commit description.
    Suggested-by: default avatarIngo Molnar <mingo@elte.hu>
    Signed-off-by: default avatarYinghai Lu <yinghai@kernel.org>
    Acked-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Makefile 1.72 KB