mm: remove alloc_vm_area (301fa9f2) · Commits · 戴 / test

include/linux/vmalloc.h

+1 −4

Original line number	Diff line number	Diff line
		@@ -169,6 +169,7 @@ extern struct vm_struct *__get_vm_area_caller(unsigned long size,
		unsigned long flags,
		unsigned long start, unsigned long end,
		const void *caller);
		void free_vm_area(struct vm_struct *area);
		extern struct vm_struct remove_vm_area(const void addr);
		extern struct vm_struct find_vm_area(const void addr);

		@@ -204,10 +205,6 @@ static inline void set_vm_flush_reset_perms(void *addr)
		}
		#endif

		/* Allocate/destroy a 'vmalloc' VM area. */
		extern struct vm_struct alloc_vm_area(size_t size, pte_t *ptes);
		extern void free_vm_area(struct vm_struct *area);

		/* for /dev/kmem */
		extern long vread(char buf, char addr, unsigned long count);
		extern long vwrite(char buf, char addr, unsigned long count);

+0 −7

Original line number	Diff line number	Diff line
		@@ -354,13 +354,6 @@ void vm_unmap_aliases(void)
		}
		EXPORT_SYMBOL_GPL(vm_unmap_aliases);

		struct vm_struct alloc_vm_area(size_t size, pte_t *ptes)
		{
		BUG();
		return NULL;
		}
		EXPORT_SYMBOL_GPL(alloc_vm_area);

		void free_vm_area(struct vm_struct *area)
		{
		BUG();

+0 −48

Original line number	Diff line number	Diff line
		@@ -3083,54 +3083,6 @@ int remap_vmalloc_range(struct vm_area_struct vma, void addr,
		}
		EXPORT_SYMBOL(remap_vmalloc_range);

		static int f(pte_t pte, unsigned long addr, void data)
		{
		pte_t ***p = data;

		if (p) {
		(p) = pte;
		(*p)++;
		}
		return 0;
		}

		/**
		* alloc_vm_area - allocate a range of kernel address space
		* @size: size of the area
		* @ptes: returns the PTEs for the address space
		*
		* Returns: NULL on failure, vm_struct on success
		*
		* This function reserves a range of kernel address space, and
		* allocates pagetables to map that range. No actual mappings
		* are created.
		*
		* If @ptes is non-NULL, pointers to the PTEs (in init_mm)
		* allocated for the VM area are returned.
		*/
		struct vm_struct alloc_vm_area(size_t size, pte_t *ptes)
		{
		struct vm_struct *area;

		area = get_vm_area_caller(size, VM_IOREMAP,
		__builtin_return_address(0));
		if (area == NULL)
		return NULL;

		/*
		* This ensures that page tables are constructed for this region
		* of kernel virtual address space and mapped into init_mm.
		*/
		if (apply_to_page_range(&init_mm, (unsigned long)area->addr,
		size, f, ptes ? &ptes : NULL)) {
		free_vm_area(area);
		return NULL;
		}

		return area;
		}
		EXPORT_SYMBOL_GPL(alloc_vm_area);

		void free_vm_area(struct vm_struct *area)
		{
		struct vm_struct *ret;