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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2018-06-29 11:36:29 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-07-24 15:03:17 +0300 |
| commit | 1531cff44b5bb30c899404c044805ec60b2f3620 (patch) | |
| tree | e8a6080121f8265944405aa446677af64c7b54c1 /arch/powerpc/mm/dump_hashpagetable.c | |
| parent | 7d4340bb92a9df78e6e28152f3dd89d9bd82146b (diff) | |
| download | linux-1531cff44b5bb30c899404c044805ec60b2f3620.tar.xz | |
powerpc/mm/hash: Remove the superfluous bitwise operation when find hpte group
When computing the starting slot number for a hash page table group we used
to do this
hpte_group = ((hash & htab_hash_mask) * HPTES_PER_GROUP) & ~0x7UL;
Multiplying with 8 (HPTES_PER_GROUP) imply the last three bits are 0. Hence we
really don't need to clear then separately.
Signed-off-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/mm/dump_hashpagetable.c')
| -rw-r--r-- | arch/powerpc/mm/dump_hashpagetable.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/mm/dump_hashpagetable.c b/arch/powerpc/mm/dump_hashpagetable.c index 14cfb11b09d0..d241cb6518da 100644 --- a/arch/powerpc/mm/dump_hashpagetable.c +++ b/arch/powerpc/mm/dump_hashpagetable.c @@ -260,7 +260,7 @@ static int pseries_find(unsigned long ea, int psize, bool primary, u64 *v, u64 * /* to check in the secondary hash table, we invert the hash */ if (!primary) hash = ~hash; - hpte_group = ((hash & htab_hash_mask) * HPTES_PER_GROUP) & ~0x7UL; + hpte_group = (hash & htab_hash_mask) * HPTES_PER_GROUP; /* see if we can find an entry in the hpte with this hash */ for (i = 0; i < HPTES_PER_GROUP; i += 4, hpte_group += 4) { lpar_rc = plpar_pte_read_4(0, hpte_group, (void *)ptes); |