Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 35602f82 authored by Nicholas Piggin's avatar Nicholas Piggin Committed by Michael Ellerman
Browse files

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: f4ea6dcb ("powerpc/mm: Enable mappings above 128TB")
Cc: stable@vger.kernel.org # v4.12+
Signed-off-by: default avatarNicholas Piggin <npiggin@gmail.com>
Reviewed-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent effc1b25

arch/powerpc/mm/slice.c

+1 −1
Original line number Diff line number Diff line
@@ -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)