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With CONFIG_BUG=n, the 64-bit Book3S build fails with: arch/powerpc/include/asm/book3s/64/pgtable-64k.h: In function 'get_hugepd_cache_index': arch/powerpc/include/asm/book3s/64/pgtable-64k.h:51:1: error: no return statement in function returning non-void Currently the body of the function is just BUG(), so when CONFIG_BUG=n it is an empty function, leading to the error. get_hugepd_cache_index() should never be called, the only call is behind an is_hugepd() check, which is always false for this configuration. Instead mark it as always inline, and change the BUG() to BUILD_BUG(). That should allow the compiler to see that the function is never called, and therefore that it never returns, fixing the build error. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20240306125853.3714578-1-mpe@ellerman.id.au
64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H
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#define _ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H
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#ifndef __ASSEMBLY__
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#ifdef CONFIG_HUGETLB_PAGE
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/*
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* We have PGD_INDEX_SIZ = 12 and PTE_INDEX_SIZE = 8, so that we can have
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* 16GB hugepage pte in PGD and 16MB hugepage pte at PMD;
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*
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* Defined in such a way that we can optimize away code block at build time
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* if CONFIG_HUGETLB_PAGE=n.
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*
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* returns true for pmd migration entries, THP, devmap, hugetlb
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* But compile time dependent on CONFIG_HUGETLB_PAGE
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*/
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static inline int pmd_huge(pmd_t pmd)
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{
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/*
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* leaf pte for huge page
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*/
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return !!(pmd_raw(pmd) & cpu_to_be64(_PAGE_PTE));
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}
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static inline int pud_huge(pud_t pud)
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{
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/*
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* leaf pte for huge page
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*/
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return !!(pud_raw(pud) & cpu_to_be64(_PAGE_PTE));
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}
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/*
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* With 64k page size, we have hugepage ptes in the pgd and pmd entries. We don't
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* need to setup hugepage directory for them. Our pte and page directory format
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* enable us to have this enabled.
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*/
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static inline int hugepd_ok(hugepd_t hpd)
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{
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return 0;
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}
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#define is_hugepd(pdep) 0
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/*
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* This should never get called
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*/
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static __always_inline int get_hugepd_cache_index(int index)
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{
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BUILD_BUG();
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}
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#endif /* CONFIG_HUGETLB_PAGE */
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static inline int remap_4k_pfn(struct vm_area_struct *vma, unsigned long addr,
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unsigned long pfn, pgprot_t prot)
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{
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if (radix_enabled())
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BUG();
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return hash__remap_4k_pfn(vma, addr, pfn, prot);
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}
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#endif /* __ASSEMBLY__ */
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#endif /*_ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H */
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