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| author |   Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> | 2018-09-20 23:39:46 +0530 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2018-10-03 15:40:00 +1000 |
| commit | 8890e03380d361f67fdd7f91758d93339fd66ca9 (patch) | |
| tree | e4d08bd50f0cc52538837ece8c9a9b53bcc59e31 /arch/powerpc/include/asm/book3s/64/pgtable-64k.h | |
| parent | arch/powerpc/mm/hash: validate the pte entries before handling the hash fault (diff) | |
| download | wireguard-linux-8890e03380d361f67fdd7f91758d93339fd66ca9.tar.xz wireguard-linux-8890e03380d361f67fdd7f91758d93339fd66ca9.zip | |
powerpc/mm/thp: update pmd_trans_huge to check for pmd_present
We need to make sure pmd_trans_huge returns false for a pmd migration entry.
We mark the migration entry by clearing the _PAGE_PRESENT bit. We keep the
_PAGE_PTE bit set to indicate a leaf page table entry. Hence we need to make
sure we check for pmd_present() so that pmd_trans_huge won't return true on
pmd migration entry.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/book3s/64/pgtable-64k.h')
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/pgtable-64k.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/pgtable-64k.h b/arch/powerpc/include/asm/book3s/64/pgtable-64k.h index d7ee249d6890..e3d4dd4ae2fa 100644 --- a/arch/powerpc/include/asm/book3s/64/pgtable-64k.h +++ b/arch/powerpc/include/asm/book3s/64/pgtable-64k.h @@ -10,6 +10,9 @@ * * Defined in such a way that we can optimize away code block at build time * if CONFIG_HUGETLB_PAGE=n. + * + * returns true for pmd migration entries, THP, devmap, hugetlb + * But compile time dependent on CONFIG_HUGETLB_PAGE */ static inline int pmd_huge(pmd_t pmd) { |