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mips: sgi-ip27: switch from DISCONTIGMEM to SPARSEMEM
The memory initialization of SGI-IP27 is already half-way to support SPARSEMEM. It only had free_bootmem_with_active_regions() left-overs interfering with sparse_memory_present_with_active_regions(). Replace these calls with simpler memblocks_present() call in prom_meminit() and adjust arch/mips/Kconfig to enable SPARSEMEM and SPARSEMEM_EXTREME for SGI-IP27. Co-developed-by: Thomas Bogendoerfer <tbogendoerfer@suse.de> Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de> Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Paul Burton <paul.burton@mips.com> Cc: linux-mips@vger.kernel.org Cc: linux-kernel@vger.kernel.org
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