diff options
| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2015-09-07 12:53:53 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2015-10-12 15:29:59 +1100 |
| commit | ec2640b114d535ba7d895b6ee353791d542f2407 (patch) | |
| tree | e80d7da8245605ac835eba624756100889e206b6 /arch/powerpc/mm/hugetlbpage.c | |
| parent | c13e1c05b22b504bf0d72fc762a02be37df2d1b0 (diff) | |
powerpc/mm: Disable hugepd for 64K page size.
After commit e2b3d202d1dba8f3546ed28224ce485bc50010be
("powerpc: Switch 16GB and 16MB explicit hugepages to a
different page table format"), we don't need to support
is_hugepd() for 64K page size.
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/hugetlbpage.c')
| -rw-r--r-- | arch/powerpc/mm/hugetlbpage.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c index 06c14523b787..f093828e8997 100644 --- a/arch/powerpc/mm/hugetlbpage.c +++ b/arch/powerpc/mm/hugetlbpage.c @@ -89,6 +89,25 @@ int pgd_huge(pgd_t pgd) */ return ((pgd_val(pgd) & 0x3) != 0x0); } + +#if defined(CONFIG_PPC_64K_PAGES) && defined(CONFIG_DEBUG_VM) +/* + * This enables us to catch the wrong page directory format + * Moved here so that we can use WARN() in the call. + */ +int hugepd_ok(hugepd_t hpd) +{ + bool is_hugepd; + + /* + * We should not find this format in page directory, warn otherwise. + */ + is_hugepd = (((hpd.pd & 0x3) == 0x0) && ((hpd.pd & HUGEPD_SHIFT_MASK) != 0)); + WARN(is_hugepd, "Found wrong page directory format\n"); + return 0; +} +#endif + #else int pmd_huge(pmd_t pmd) { |