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author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2015-12-01 09:06:54 +0530 |
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committer | Michael Ellerman <mpe@ellerman.id.au> | 2015-12-14 15:19:14 +1100 |
commit | 6a119eae942c51ccf1091936c534bac12cae630e (patch) | |
tree | f1124f47f1e7b9d94777623e3914f74ea4aad8a3 /kernel/seccomp.c | |
parent | e34aa03ca48d0c7982530436ce996f374b65913c (diff) |
powerpc/mm: Add a _PAGE_PTE bit
For a pte entry we will have _PAGE_PTE set. Our pte page
address have a minimum alignment requirement of HUGEPD_SHIFT_MASK + 1.
We use the lower 7 bits to indicate hugepd. ie.
For pmd and pgd we can find:
1) _PAGE_PTE set pte -> indicate PTE
2) bits [2..6] non zero -> indicate hugepd.
They also encode the size. We skip bit 1 (_PAGE_PRESENT).
3) othewise pointer to next table.
Acked-by: Scott Wood <scottwood@freescale.com>
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 'kernel/seccomp.c')
0 files changed, 0 insertions, 0 deletions