mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-10-28 12:53:14 +01:00
Thomas Huth
5339ec29f9
While the GCC and Clang compilers already define __ASSEMBLER__ automatically when compiling assembly code, __ASSEMBLY__ is a macro that only gets defined by the Makefiles in the kernel. This can be very confusing when switching between userspace and kernelspace coding, or when dealing with uapi headers that rather should use __ASSEMBLER__ instead. So let's standardize now on the __ASSEMBLER__ macro that is provided by the compilers. This is a completely mechanical patch (done with a simple "sed -i" statement). Link: https://lore.kernel.org/[email protected] Signed-off-by: Thomas Huth <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Axel Rasmussen <[email protected]> Cc: Barry Song <[email protected]> Cc: David Hildenbrand <[email protected]> Cc: Kairui Song <[email protected]> Cc: Liam R. Howlett <[email protected]> Cc: Lorenzo Stoakes <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Mike Rapoport <[email protected]> Cc: Shakeel Butt <[email protected]> Cc: Suren Baghdasaryan <[email protected]> Cc: Vlastimil Babka <[email protected]> Cc: Wei Xu <[email protected]> Cc: Yuanchu Xie <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
59 lines
1.7 KiB
C
59 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _PGTABLE_NOP4D_H
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#define _PGTABLE_NOP4D_H
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#ifndef __ASSEMBLER__
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#define __PAGETABLE_P4D_FOLDED 1
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typedef struct { pgd_t pgd; } p4d_t;
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#define P4D_SHIFT PGDIR_SHIFT
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#define PTRS_PER_P4D 1
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#define P4D_SIZE (1UL << P4D_SHIFT)
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#define P4D_MASK (~(P4D_SIZE-1))
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/*
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* The "pgd_xxx()" functions here are trivial for a folded two-level
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* setup: the p4d is never bad, and a p4d always exists (as it's folded
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* into the pgd entry)
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*/
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static inline int pgd_none(pgd_t pgd) { return 0; }
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static inline int pgd_bad(pgd_t pgd) { return 0; }
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static inline int pgd_present(pgd_t pgd) { return 1; }
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static inline void pgd_clear(pgd_t *pgd) { }
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#define p4d_ERROR(p4d) (pgd_ERROR((p4d).pgd))
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#define pgd_populate(mm, pgd, p4d) do { } while (0)
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#define pgd_populate_safe(mm, pgd, p4d) do { } while (0)
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/*
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* (p4ds are folded into pgds so this doesn't get actually called,
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* but the define is needed for a generic inline function.)
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*/
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#define set_pgd(pgdptr, pgdval) set_p4d((p4d_t *)(pgdptr), (p4d_t) { pgdval })
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static inline p4d_t *p4d_offset(pgd_t *pgd, unsigned long address)
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{
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return (p4d_t *)pgd;
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}
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#define p4d_val(x) (pgd_val((x).pgd))
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#define __p4d(x) ((p4d_t) { __pgd(x) })
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#define pgd_page(pgd) (p4d_page((p4d_t){ pgd }))
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#define pgd_page_vaddr(pgd) ((unsigned long)(p4d_pgtable((p4d_t){ pgd })))
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/*
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* allocating and freeing a p4d is trivial: the 1-entry p4d is
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* inside the pgd, so has no extra memory associated with it.
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*/
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#define p4d_alloc_one(mm, address) NULL
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#define p4d_free(mm, x) do { } while (0)
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#define p4d_free_tlb(tlb, x, a) do { } while (0)
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#undef p4d_addr_end
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#define p4d_addr_end(addr, end) (end)
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#endif /* __ASSEMBLER__ */
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#endif /* _PGTABLE_NOP4D_H */
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