From: Nicholas Piggin Date: Thu, 9 Nov 2017 17:27:38 +0000 (+1100) Subject: powerpc/64s/hash: Allow MAP_FIXED allocations to cross 128TB boundary X-Git-Tag: v4.19~2055^2~16 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=35602f82d0c765f991420e319c8d3a596c921eb8;p=platform%2Fkernel%2Flinux-rpi.git powerpc/64s/hash: Allow MAP_FIXED allocations to cross 128TB boundary While mapping hints with a length that cross 128TB are disallowed, MAP_FIXED allocations that cross 128TB are allowed. These are failing on hash (on radix they succeed). Add an additional case for fixed mappings to expand the addr_limit when crossing 128TB. Fixes: f4ea6dcb08ea ("powerpc/mm: Enable mappings above 128TB") Cc: stable@vger.kernel.org # v4.12+ Signed-off-by: Nicholas Piggin Reviewed-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman --- diff --git a/arch/powerpc/mm/slice.c b/arch/powerpc/mm/slice.c index 3889201..a4f9369 100644 --- a/arch/powerpc/mm/slice.c +++ b/arch/powerpc/mm/slice.c @@ -418,7 +418,7 @@ unsigned long slice_get_unmapped_area(unsigned long addr, unsigned long len, unsigned long high_limit; high_limit = DEFAULT_MAP_WINDOW; - if (addr >= high_limit) + if (addr >= high_limit || (fixed && (addr + len > high_limit))) high_limit = TASK_SIZE; if (len > high_limit)