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authorDavid Daney <david.daney@cavium.com>2015-02-24 15:35:34 -0800
committerRalf Baechle <ralf@linux-mips.org>2015-04-01 17:21:59 +0200
commit5ae03b1220ac22b823d8414997329806db16020c (patch)
treec82b4fbb8edf5593ab2deddc057fbd6561eb680f /drivers/ssb
parent80aaaa8b93d860f828e2cf883f307894640765f0 (diff)
downloadlinux-5ae03b1220ac22b823d8414997329806db16020c.tar.bz2
MIPS: Expand __swp_offset() to carry 40 significant bits for 64-bit kernel.
With CONFIG_MIGRATION, the PFN of the migrating pages is stored in __swp_offset(), so we must have enough bits to store the largest possible PFN. OCTEON NUMA systems have 41 bits of physical address space, so with 4K pages (12-bits), we need at least 29 bits to store the PFN. The current width of 24-bits is too narrow, so expand it all the way out to 40-bits. This leaves the low order 16 bits as zero which does not interfere with any of the PTE bits. Signed-off-by: David Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9315/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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