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sparc32: simplify detection of memory zone boundaries
free_area_init() only requires the definition of maximal PFN for each of the supported zone rater than calculation of actual zone sizes and the sizes of the holes between the zones. After removal of CONFIG_HAVE_MEMBLOCK_NODE_MAP the free_area_init() is available to all architectures. Using this function instead of free_area_init_node() simplifies the zone detection. Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Tested-by: Hoan Tran <hoan@os.amperecomputing.com> [arm64] Cc: Baoquan 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: 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/20200412194859.12663-13-rppt@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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1 changed files with 5 additions and 16 deletions
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@ -1008,24 +1008,13 @@ void __init srmmu_paging_init(void)
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kmap_init();
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{
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unsigned long zones_size[MAX_NR_ZONES];
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unsigned long zholes_size[MAX_NR_ZONES];
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unsigned long npages;
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int znum;
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unsigned long max_zone_pfn[MAX_NR_ZONES] = { 0 };
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for (znum = 0; znum < MAX_NR_ZONES; znum++)
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zones_size[znum] = zholes_size[znum] = 0;
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max_zone_pfn[ZONE_DMA] = max_low_pfn;
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max_zone_pfn[ZONE_NORMAL] = max_low_pfn;
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max_zone_pfn[ZONE_HIGHMEM] = highend_pfn;
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npages = max_low_pfn - pfn_base;
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zones_size[ZONE_DMA] = npages;
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zholes_size[ZONE_DMA] = npages - pages_avail;
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npages = highend_pfn - max_low_pfn;
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zones_size[ZONE_HIGHMEM] = npages;
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zholes_size[ZONE_HIGHMEM] = npages - calc_highpages();
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free_area_init_node(0, zones_size, pfn_base, zholes_size);
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free_area_init(max_zone_pfn);
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}
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}
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