rtl88x2CE_WiFi_linux add concurrent mode

hc

2024-09-20 cf4ce59b3b70238352c7f1729f0f7223214828ad

 kernel/include/linux/highmem.h
..
..
@@ -334,4 +334,22 @@
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 #endif
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+static inline void memcpy_from_page(char *to, struct page *page,
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+				    size_t offset, size_t len)
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+{
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+	char *from = kmap_atomic(page);
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+
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+	memcpy(to, from + offset, len);
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+	kunmap_atomic(from);
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+}
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+
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+static inline void memcpy_to_page(struct page *page, size_t offset,
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+				  const char *from, size_t len)
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+{
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+	char *to = kmap_atomic(page);
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+
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+	memcpy(to + offset, from, len);
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+	kunmap_atomic(to);
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+}
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+
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 #endif /* _LINUX_HIGHMEM_H */