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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
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@ -1462,12 +1462,5 @@ static inline bool pud_is_leaf(pud_t pud)
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return !!(pud_raw(pud) & cpu_to_be64(_PAGE_PTE));
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}
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#define p4d_is_leaf p4d_is_leaf
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#define p4d_leaf p4d_is_leaf
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static inline bool p4d_is_leaf(p4d_t p4d)
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{
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return !!(p4d_raw(p4d) & cpu_to_be64(_PAGE_PTE));
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}
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_POWERPC_BOOK3S_64_PGTABLE_H_ */
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