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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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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/20260619131830.229804-1-thuth@redhat.com Signed-off-by: Thomas Huth <thuth@redhat.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Axel Rasmussen <axelrasmussen@google.com> Cc: Barry Song <baohua@kernel.org> Cc: David Hildenbrand <david@kernel.org> Cc: Kairui Song <kasong@tencent.com> Cc: Liam R. Howlett <liam@infradead.org> Cc: Lorenzo Stoakes <ljs@kernel.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Shakeel Butt <shakeel.butt@linux.dev> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@kernel.org> Cc: Wei Xu <weixugc@google.com> Cc: Yuanchu Xie <yuanchu@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_MEMORY_MODEL_H
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#define __ASM_MEMORY_MODEL_H
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#include <linux/pfn.h>
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#ifndef __ASSEMBLER__
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/*
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* supports 3 memory models.
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*/
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#if defined(CONFIG_FLATMEM)
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#ifndef ARCH_PFN_OFFSET
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#define ARCH_PFN_OFFSET (0UL)
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#endif
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#define __pfn_to_page(pfn) (mem_map + ((pfn) - ARCH_PFN_OFFSET))
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#define __page_to_pfn(page) ((unsigned long)((page) - mem_map) + \
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ARCH_PFN_OFFSET)
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/* avoid <linux/mm.h> include hell */
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extern unsigned long max_mapnr;
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#ifndef pfn_valid
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static inline int pfn_valid(unsigned long pfn)
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{
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unsigned long pfn_offset = ARCH_PFN_OFFSET;
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return pfn >= pfn_offset && (pfn - pfn_offset) < max_mapnr;
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}
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#define pfn_valid pfn_valid
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#ifndef for_each_valid_pfn
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#define for_each_valid_pfn(pfn, start_pfn, end_pfn) \
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for ((pfn) = max_t(unsigned long, (start_pfn), ARCH_PFN_OFFSET); \
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(pfn) < min_t(unsigned long, (end_pfn), \
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ARCH_PFN_OFFSET + max_mapnr); \
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(pfn)++)
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#endif /* for_each_valid_pfn */
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#endif /* valid_pfn */
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#elif defined(CONFIG_SPARSEMEM_VMEMMAP)
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/* memmap is virtually contiguous. */
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#define __pfn_to_page(pfn) (vmemmap + (pfn))
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#define __page_to_pfn(page) (unsigned long)((page) - vmemmap)
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#elif defined(CONFIG_SPARSEMEM)
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/*
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* Note: section's mem_map is encoded to reflect its start_pfn.
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* section[i].section_mem_map == mem_map's address - start_pfn;
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*/
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#define __page_to_pfn(pg) \
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({ const struct page *__pg = (pg); \
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int __sec = memdesc_section(__pg->flags); \
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(unsigned long)(__pg - __section_mem_map_addr(__nr_to_section(__sec))); \
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})
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#define __pfn_to_page(pfn) \
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({ unsigned long __pfn = (pfn); \
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struct mem_section *__sec = __pfn_to_section(__pfn); \
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__section_mem_map_addr(__sec) + __pfn; \
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})
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#endif /* CONFIG_FLATMEM/SPARSEMEM */
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/*
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* Convert a physical address to a Page Frame Number and back
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*/
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#define __phys_to_pfn(paddr) PHYS_PFN(paddr)
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#define __pfn_to_phys(pfn) PFN_PHYS(pfn)
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#define page_to_pfn __page_to_pfn
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#define pfn_to_page __pfn_to_page
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#ifdef CONFIG_DEBUG_VIRTUAL
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#define page_to_phys(page) \
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({ \
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unsigned long __pfn = page_to_pfn(page); \
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\
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WARN_ON_ONCE(!pfn_valid(__pfn)); \
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PFN_PHYS(__pfn); \
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})
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#else
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#define page_to_phys(page) PFN_PHYS(page_to_pfn(page))
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#endif /* CONFIG_DEBUG_VIRTUAL */
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#define phys_to_page(phys) pfn_to_page(PHYS_PFN(phys))
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#endif /* __ASSEMBLER__ */
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#endif
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