disable kernel build waring

hc

2024-05-10 093a6c67005148ae32a5c9e4553491b9f5c2457b

 kernel/include/linux/pfn_t.h
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@@ -9,6 +9,8 @@
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  * PFN_SG_LAST - pfn references a page and is the last scatterlist entry
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  * PFN_DEV - pfn is not covered by system memmap by default
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  * PFN_MAP - pfn has a dynamic page mapping established by a device driver
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+ * PFN_SPECIAL - for CONFIG_FS_DAX_LIMITED builds to allow XIP, but not
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+ *		 get_user_pages
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  */
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 #define PFN_FLAGS_MASK (((u64) (~PAGE_MASK)) << (BITS_PER_LONG_LONG - PAGE_SHIFT))
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 #define PFN_SG_CHAIN (1ULL << (BITS_PER_LONG_LONG - 1))
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@@ -64,13 +66,6 @@
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 	return PFN_PHYS(pfn_t_to_pfn(pfn));
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 }
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-static inline void *pfn_t_to_virt(pfn_t pfn)
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-{
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-	if (pfn_t_has_page(pfn))
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-		return __va(pfn_t_to_phys(pfn));
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-	return NULL;
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-}
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-
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 static inline pfn_t page_to_pfn_t(struct page *page)
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 {
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 	return pfn_to_pfn_t(page_to_pfn(page));
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@@ -102,7 +97,7 @@
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 #endif
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 #endif
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-#ifdef __HAVE_ARCH_PTE_DEVMAP
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+#ifdef CONFIG_ARCH_HAS_PTE_DEVMAP
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 static inline bool pfn_t_devmap(pfn_t pfn)
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 {
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 	const u64 flags = PFN_DEV|PFN_MAP;
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@@ -120,7 +115,7 @@
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 	defined(CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD)
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 pud_t pud_mkdevmap(pud_t pud);
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 #endif
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-#endif /* __HAVE_ARCH_PTE_DEVMAP */
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+#endif /* CONFIG_ARCH_HAS_PTE_DEVMAP */
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 #ifdef CONFIG_ARCH_HAS_PTE_SPECIAL
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 static inline bool pfn_t_special(pfn_t pfn)