diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2021-12-02 00:41:47 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-12-02 22:57:24 +1100 |
| commit | 20626177c9de726c48802c15e8635cc154645588 (patch) | |
| tree | 889d34d71118a4cb38083e5fa69d91dfcce4f888 /arch/powerpc/mm/book3s64/pgtable.c | |
| parent | ffbe5d21d10f9c7890c07fca17db772f941385bf (diff) | |
powerpc: make memremap_compat_align 64s-only
memremap_compat_align is only relevant when ZONE_DEVICE is selected.
ZONE_DEVICE depends on ARCH_HAS_PTE_DEVMAP, which is only selected
by PPC_BOOK3S_64.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211201144153.2456614-13-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/mm/book3s64/pgtable.c')
| -rw-r--r-- | arch/powerpc/mm/book3s64/pgtable.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/powerpc/mm/book3s64/pgtable.c b/arch/powerpc/mm/book3s64/pgtable.c index 0e6254160673..d3b01f6ba530 100644 --- a/arch/powerpc/mm/book3s64/pgtable.c +++ b/arch/powerpc/mm/book3s64/pgtable.c @@ -528,3 +528,23 @@ static int __init pgtable_debugfs_setup(void) return 0; } arch_initcall(pgtable_debugfs_setup); + +#ifdef CONFIG_ZONE_DEVICE +/* + * Override the generic version in mm/memremap.c. + * + * With hash translation, the direct-map range is mapped with just one + * page size selected by htab_init_page_sizes(). Consult + * mmu_psize_defs[] to determine the minimum page size alignment. +*/ +unsigned long memremap_compat_align(void) +{ + if (!radix_enabled()) { + unsigned int shift = mmu_psize_defs[mmu_linear_psize].shift; + return max(SUBSECTION_SIZE, 1UL << shift); + } + + return SUBSECTION_SIZE; +} +EXPORT_SYMBOL_GPL(memremap_compat_align); +#endif |