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| author | Michael Ellerman <mpe@ellerman.id.au> | 2022-09-03 22:36:40 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-09-26 20:58:18 +1000 |
| commit | 79c5640ab4460a03535ce0f120193174e7701b65 (patch) | |
| tree | 7b16839c51ebaf47ebe0ef8399a3e002975e5e54 /arch/powerpc/include | |
| parent | 51da853e3708852f47cd95e6f5e1821c3d54c3ef (diff) | |
| download | linux-79c5640ab4460a03535ce0f120193174e7701b65.tar.gz linux-79c5640ab4460a03535ce0f120193174e7701b65.tar.bz2 linux-79c5640ab4460a03535ce0f120193174e7701b65.zip | |
powerpc/mm/64s: Drop p4d_leaf()
Because 64-bit Book3S uses pgtable-nop4d.h, the P4D is folded into the
PGD. So P4D entries are actually PGD entries, or vice versa.
The other way to think of it is that the P4D is a single entry page
table below the PGD. Zero bits of the address are needed to index into
the P4D, therefore a P4D entry maps the same size address space as a PGD
entry.
As explained in the previous commit, there are no huge page sizes
supported directly at the PGD level on 64-bit Book3S, so there are also
no huge page sizes supported at the P4D level.
Therefore p4d_is_leaf() can never be true, so drop the definition and
fallback to the default implementation that always returns false.
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220903123640.719846-2-mpe@ellerman.id.au
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/pgtable.h | 7 |
1 files changed, 0 insertions, 7 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h index b7fd9b69e828..28fd016cf7ff 100644 --- a/arch/powerpc/include/asm/book3s/64/pgtable.h +++ b/arch/powerpc/include/asm/book3s/64/pgtable.h @@ -1462,12 +1462,5 @@ static inline bool pud_is_leaf(pud_t pud) return !!(pud_raw(pud) & cpu_to_be64(_PAGE_PTE)); } -#define p4d_is_leaf p4d_is_leaf -#define p4d_leaf p4d_is_leaf -static inline bool p4d_is_leaf(p4d_t p4d) -{ - return !!(p4d_raw(p4d) & cpu_to_be64(_PAGE_PTE)); -} - #endif /* __ASSEMBLY__ */ #endif /* _ASM_POWERPC_BOOK3S_64_PGTABLE_H_ */ |