• Mike Rapoport's avatar
    mm: memblock: replace dereferences of memblock_region.nid with API calls · d622abf7
    Mike Rapoport authored
    Patch series "mm: rework free_area_init*() funcitons".
    
    After the discussion [1] about removal of CONFIG_NODES_SPAN_OTHER_NODES
    and CONFIG_HAVE_MEMBLOCK_NODE_MAP options, I took it a bit further and
    updated the node/zone initialization.
    
    Since all architectures have memblock, it is possible to use only the
    newer version of free_area_init_node() that calculates the zone and node
    boundaries based on memblock node mapping and architectural limits on
    possible zone PFNs.
    
    The architectures that still determined zone and hole sizes can be
    switched to the generic code and the old code that took those zone and
    hole sizes can be simply removed.
    
    And, since it all started from the removal of
    CONFIG_NODES_SPAN_OTHER_NODES, the memmap_init() is now updated to iterate
    over memblocks and so it does not need to perform early_pfn_to_nid() query
    for every PFN.
    
    [1] https://lore.kernel.org/lkml/1585420282-25630-1-git-send-email-Hoan@os.amperecomputing.com
    
    This patch (of 21):
    
    There are several places in the code that directly dereference
    memblock_region.nid despite this field being defined only when
    CONFIG_HAVE_MEMBLOCK_NODE_MAP=y.
    
    Replace these with calls to memblock_get_region_nid() to improve code
    robustness and to avoid possible breakage when
    CONFIG_HAVE_MEMBLOCK_NODE_MAP will be removed.
    Signed-off-by: default avatarMike Rapoport <rppt@linux.ibm.com>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Tested-by: Hoan Tran <hoan@os.amperecomputing.com>	[arm64]
    Reviewed-by: default avatarBaoquan He <bhe@redhat.com>
    Cc: Brian Cain <bcain@codeaurora.org>
    Cc: Catalin Marinas <catalin.marinas@arm.com>
    Cc: "David S. Miller" <davem@davemloft.net>
    Cc: Geert Uytterhoeven <geert@linux-m68k.org>
    Cc: Greentime Hu <green.hu@gmail.com>
    Cc: Greg Ungerer <gerg@linux-m68k.org>
    Cc: Guan Xuetao <gxt@pku.edu.cn>
    Cc: Guo Ren <guoren@kernel.org>
    Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
    Cc: Helge Deller <deller@gmx.de>
    Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
    Cc: Jonathan Corbet <corbet@lwn.net>
    Cc: Ley Foon Tan <ley.foon.tan@intel.com>
    Cc: Mark Salter <msalter@redhat.com>
    Cc: Matt Turner <mattst88@gmail.com>
    Cc: Max Filippov <jcmvbkbc@gmail.com>
    Cc: Michael Ellerman <mpe@ellerman.id.au>
    Cc: Michal Hocko <mhocko@kernel.org>
    Cc: Michal Simek <monstr@monstr.eu>
    Cc: Mike Rapoport <rppt@kernel.org>
    Cc: Nick Hu <nickhu@andestech.com>
    Cc: Paul Walmsley <paul.walmsley@sifive.com>
    Cc: Richard Weinberger <richard@nod.at>
    Cc: Rich Felker <dalias@libc.org>
    Cc: Russell King <linux@armlinux.org.uk>
    Cc: Stafford Horne <shorne@gmail.com>
    Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
    Cc: Tony Luck <tony.luck@intel.com>
    Cc: Vineet Gupta <vgupta@synopsys.com>
    Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
    Link: http://lkml.kernel.org/r/20200412194859.12663-1-rppt@kernel.org
    Link: http://lkml.kernel.org/r/20200412194859.12663-2-rppt@kernel.orgSigned-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    d622abf7
numa.c 23.6 KB