修改4g拨号为QMI,需要在系统里后台执行quectel-CM

hc

2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5

 kernel/include/linux/swapops.h
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@@ -6,6 +6,8 @@
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 #include <linux/bug.h>
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 #include <linux/mm_types.h>
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+#ifdef CONFIG_MMU
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+
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 /*
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  * swapcache pages are stored in the swapper_space radix tree.  We want to
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  * get good packing density in that tree, so the index should be dense in
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@@ -18,9 +20,18 @@
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  *
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  * swp_entry_t's are *never* stored anywhere in their arch-dependent format.
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  */
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-#define SWP_TYPE_SHIFT(e)	((sizeof(e.val) * 8) - \
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-			(MAX_SWAPFILES_SHIFT + RADIX_TREE_EXCEPTIONAL_SHIFT))
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-#define SWP_OFFSET_MASK(e)	((1UL << SWP_TYPE_SHIFT(e)) - 1)
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+#define SWP_TYPE_SHIFT	(BITS_PER_XA_VALUE - MAX_SWAPFILES_SHIFT)
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+#define SWP_OFFSET_MASK	((1UL << SWP_TYPE_SHIFT) - 1)
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+
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+/* Clear all flags but only keep swp_entry_t related information */
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+static inline pte_t pte_swp_clear_flags(pte_t pte)
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+{
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+	if (pte_swp_soft_dirty(pte))
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+		pte = pte_swp_clear_soft_dirty(pte);
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+	if (pte_swp_uffd_wp(pte))
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+		pte = pte_swp_clear_uffd_wp(pte);
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+	return pte;
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+}
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 /*
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  * Store a type+offset into a swp_entry_t in an arch-independent format
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@@ -29,8 +40,7 @@
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 {
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 	swp_entry_t ret;
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-	ret.val = (type << SWP_TYPE_SHIFT(ret)) |
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-			(offset & SWP_OFFSET_MASK(ret));
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+	ret.val = (type << SWP_TYPE_SHIFT) | (offset & SWP_OFFSET_MASK);
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 	return ret;
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 }
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@@ -40,7 +50,7 @@
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  */
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 static inline unsigned swp_type(swp_entry_t entry)
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 {
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-	return (entry.val >> SWP_TYPE_SHIFT(entry));
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+	return (entry.val >> SWP_TYPE_SHIFT);
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 }
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 /*
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@@ -49,16 +59,14 @@
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  */
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 static inline pgoff_t swp_offset(swp_entry_t entry)
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 {
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-	return entry.val & SWP_OFFSET_MASK(entry);
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+	return entry.val & SWP_OFFSET_MASK;
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 }
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-#ifdef CONFIG_MMU
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 /* check whether a pte points to a swap entry */
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 static inline int is_swap_pte(pte_t pte)
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 {
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 	return !pte_none(pte) && !pte_present(pte);
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 }
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-#endif
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 /*
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  * Convert the arch-dependent pte representation of a swp_entry_t into an
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@@ -68,8 +76,7 @@
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 {
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 	swp_entry_t arch_entry;
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-	if (pte_swp_soft_dirty(pte))
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-		pte = pte_swp_clear_soft_dirty(pte);
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+	pte = pte_swp_clear_flags(pte);
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 	arch_entry = __pte_to_swp_entry(pte);
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 	return swp_entry(__swp_type(arch_entry), __swp_offset(arch_entry));
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 }
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@@ -90,16 +97,13 @@
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 {
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 	swp_entry_t entry;
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-	entry.val = (unsigned long)arg >> RADIX_TREE_EXCEPTIONAL_SHIFT;
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+	entry.val = xa_to_value(arg);
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 	return entry;
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 }
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 static inline void *swp_to_radix_entry(swp_entry_t entry)
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 {
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-	unsigned long value;
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-
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-	value = entry.val << RADIX_TREE_EXCEPTIONAL_SHIFT;
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-	return (void *)(value | RADIX_TREE_EXCEPTIONAL_ENTRY);
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+	return xa_mk_value(entry.val);
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 }
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 #if IS_ENABLED(CONFIG_DEVICE_PRIVATE)
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@@ -134,12 +138,6 @@
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 {
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 	return pfn_to_page(swp_offset(entry));
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 }
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-
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-vm_fault_t device_private_entry_fault(struct vm_area_struct *vma,
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-		       unsigned long addr,
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-		       swp_entry_t entry,
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-		       unsigned int flags,
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-		       pmd_t *pmdp);
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 #else /* CONFIG_DEVICE_PRIVATE */
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 static inline swp_entry_t make_device_private_entry(struct page *page, bool write)
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 {
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@@ -168,15 +166,6 @@
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 static inline struct page *device_private_entry_to_page(swp_entry_t entry)
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 {
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 	return NULL;
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-}
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-
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-static inline vm_fault_t device_private_entry_fault(struct vm_area_struct *vma,
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-				     unsigned long addr,
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-				     swp_entry_t entry,
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-				     unsigned int flags,
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-				     pmd_t *pmdp)
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-{
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-	return VM_FAULT_SIGBUS;
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 }
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 #endif /* CONFIG_DEVICE_PRIVATE */
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@@ -276,6 +265,8 @@
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 	if (pmd_swp_soft_dirty(pmd))
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 		pmd = pmd_swp_clear_soft_dirty(pmd);
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+	if (pmd_swp_uffd_wp(pmd))
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+		pmd = pmd_swp_clear_uffd_wp(pmd);
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 	arch_entry = __pmd_to_swp_entry(pmd);
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 	return swp_entry(__swp_type(arch_entry), __swp_offset(arch_entry));
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 }
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@@ -381,4 +372,5 @@
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 }
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 #endif
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+#endif /* CONFIG_MMU */
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 #endif /* _LINUX_SWAPOPS_H */