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| author | Nicholas Piggin <npiggin@gmail.com> | 2017-11-09 20:27:38 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-11-13 15:35:06 +0300 |
| commit | 35602f82d0c765f991420e319c8d3a596c921eb8 (patch) | |
| tree | f8d5512981cebf04772e1a15030e3bae3599ee7e /arch/powerpc | |
| parent | effc1b25088502fbd30305c79773de2d1f7470a6 (diff) | |
| download | linux-35602f82d0c765f991420e319c8d3a596c921eb8.tar.xz | |
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 <npiggin@gmail.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/mm/slice.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/mm/slice.c b/arch/powerpc/mm/slice.c index 3889201b560c..a4f93699194b 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) |