• Cody P Schafer's avatar
    mm: add & use zone_end_pfn() and zone_spans_pfn() · 108bcc96
    Cody P Schafer authored
    Add 2 helpers (zone_end_pfn() and zone_spans_pfn()) to reduce code
    duplication.
    
    This also switches to using them in compaction (where an additional
    variable needed to be renamed), page_alloc, vmstat, memory_hotplug, and
    kmemleak.
    
    Note that in compaction.c I avoid calling zone_end_pfn() repeatedly
    because I expect at some point the sycronization issues with start_pfn &
    spanned_pages will need fixing, either by actually using the seqlock or
    clever memory barrier usage.
    Signed-off-by: default avatarCody P Schafer <cody@linux.vnet.ibm.com>
    Cc: David Hansen <dave@linux.vnet.ibm.com>
    Cc: Catalin Marinas <catalin.marinas@arm.com>
    Cc: Johannes Weiner <hannes@cmpxchg.org>
    Cc: Mel Gorman <mel@csn.ul.ie>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    108bcc96
page_alloc.c 177 KB