#include <linux/llist.h>
#include <linux/bitops.h>
#include <linux/rbtree_augmented.h>
+#include <linux/overflow.h>
#include <linux/uaccess.h>
#include <asm/tlbflush.h>
/*** Page table manipulation functions ***/
-static void vunmap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end)
+static void vunmap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
+ pgtbl_mod_mask *mask)
{
pte_t *pte;
pte_t ptent = ptep_get_and_clear(&init_mm, addr, pte);
WARN_ON(!pte_none(ptent) && !pte_present(ptent));
} while (pte++, addr += PAGE_SIZE, addr != end);
+ *mask |= PGTBL_PTE_MODIFIED;
}
-static void vunmap_pmd_range(pud_t *pud, unsigned long addr, unsigned long end)
+static void vunmap_pmd_range(pud_t *pud, unsigned long addr, unsigned long end,
+ pgtbl_mod_mask *mask)
{
pmd_t *pmd;
unsigned long next;
+ int cleared;
pmd = pmd_offset(pud, addr);
do {
next = pmd_addr_end(addr, end);
- if (pmd_clear_huge(pmd))
+
+ cleared = pmd_clear_huge(pmd);
+ if (cleared || pmd_bad(*pmd))
+ *mask |= PGTBL_PMD_MODIFIED;
+
+ if (cleared)
continue;
if (pmd_none_or_clear_bad(pmd))
continue;
- vunmap_pte_range(pmd, addr, next);
+ vunmap_pte_range(pmd, addr, next, mask);
} while (pmd++, addr = next, addr != end);
}
-static void vunmap_pud_range(p4d_t *p4d, unsigned long addr, unsigned long end)
+static void vunmap_pud_range(p4d_t *p4d, unsigned long addr, unsigned long end,
+ pgtbl_mod_mask *mask)
{
pud_t *pud;
unsigned long next;
+ int cleared;
pud = pud_offset(p4d, addr);
do {
next = pud_addr_end(addr, end);
- if (pud_clear_huge(pud))
+
+ cleared = pud_clear_huge(pud);
+ if (cleared || pud_bad(*pud))
+ *mask |= PGTBL_PUD_MODIFIED;
+
+ if (cleared)
continue;
if (pud_none_or_clear_bad(pud))
continue;
- vunmap_pmd_range(pud, addr, next);
+ vunmap_pmd_range(pud, addr, next, mask);
} while (pud++, addr = next, addr != end);
}
-static void vunmap_p4d_range(pgd_t *pgd, unsigned long addr, unsigned long end)
+static void vunmap_p4d_range(pgd_t *pgd, unsigned long addr, unsigned long end,
+ pgtbl_mod_mask *mask)
{
p4d_t *p4d;
unsigned long next;
+ int cleared;
p4d = p4d_offset(pgd, addr);
do {
next = p4d_addr_end(addr, end);
- if (p4d_clear_huge(p4d))
+
+ cleared = p4d_clear_huge(p4d);
+ if (cleared || p4d_bad(*p4d))
+ *mask |= PGTBL_P4D_MODIFIED;
+
+ if (cleared)
continue;
if (p4d_none_or_clear_bad(p4d))
continue;
- vunmap_pud_range(p4d, addr, next);
+ vunmap_pud_range(p4d, addr, next, mask);
} while (p4d++, addr = next, addr != end);
}
-static void vunmap_page_range(unsigned long addr, unsigned long end)
+/**
+ * unmap_kernel_range_noflush - unmap kernel VM area
+ * @start: start of the VM area to unmap
+ * @size: size of the VM area to unmap
+ *
+ * Unmap PFN_UP(@size) pages at @addr. The VM area @addr and @size specify
+ * should have been allocated using get_vm_area() and its friends.
+ *
+ * NOTE:
+ * This function does NOT do any cache flushing. The caller is responsible
+ * for calling flush_cache_vunmap() on to-be-mapped areas before calling this
+ * function and flush_tlb_kernel_range() after.
+ */
+void unmap_kernel_range_noflush(unsigned long start, unsigned long size)
{
- pgd_t *pgd;
+ unsigned long end = start + size;
unsigned long next;
+ pgd_t *pgd;
+ unsigned long addr = start;
+ pgtbl_mod_mask mask = 0;
BUG_ON(addr >= end);
+ start = addr;
pgd = pgd_offset_k(addr);
do {
next = pgd_addr_end(addr, end);
+ if (pgd_bad(*pgd))
+ mask |= PGTBL_PGD_MODIFIED;
if (pgd_none_or_clear_bad(pgd))
continue;
- vunmap_p4d_range(pgd, addr, next);
+ vunmap_p4d_range(pgd, addr, next, &mask);
} while (pgd++, addr = next, addr != end);
+
+ if (mask & ARCH_PAGE_TABLE_SYNC_MASK)
+ arch_sync_kernel_mappings(start, end);
}
static int vmap_pte_range(pmd_t *pmd, unsigned long addr,
- unsigned long end, pgprot_t prot, struct page **pages, int *nr)
+ unsigned long end, pgprot_t prot, struct page **pages, int *nr,
+ pgtbl_mod_mask *mask)
{
pte_t *pte;
* callers keep track of where we're up to.
*/
- pte = pte_alloc_kernel(pmd, addr);
+ pte = pte_alloc_kernel_track(pmd, addr, mask);
if (!pte)
return -ENOMEM;
do {
set_pte_at(&init_mm, addr, pte, mk_pte(page, prot));
(*nr)++;
} while (pte++, addr += PAGE_SIZE, addr != end);
+ *mask |= PGTBL_PTE_MODIFIED;
return 0;
}
static int vmap_pmd_range(pud_t *pud, unsigned long addr,
- unsigned long end, pgprot_t prot, struct page **pages, int *nr)
+ unsigned long end, pgprot_t prot, struct page **pages, int *nr,
+ pgtbl_mod_mask *mask)
{
pmd_t *pmd;
unsigned long next;
- pmd = pmd_alloc(&init_mm, pud, addr);
+ pmd = pmd_alloc_track(&init_mm, pud, addr, mask);
if (!pmd)
return -ENOMEM;
do {
next = pmd_addr_end(addr, end);
- if (vmap_pte_range(pmd, addr, next, prot, pages, nr))
+ if (vmap_pte_range(pmd, addr, next, prot, pages, nr, mask))
return -ENOMEM;
} while (pmd++, addr = next, addr != end);
return 0;
}
static int vmap_pud_range(p4d_t *p4d, unsigned long addr,
- unsigned long end, pgprot_t prot, struct page **pages, int *nr)
+ unsigned long end, pgprot_t prot, struct page **pages, int *nr,
+ pgtbl_mod_mask *mask)
{
pud_t *pud;
unsigned long next;
- pud = pud_alloc(&init_mm, p4d, addr);
+ pud = pud_alloc_track(&init_mm, p4d, addr, mask);
if (!pud)
return -ENOMEM;
do {
next = pud_addr_end(addr, end);
- if (vmap_pmd_range(pud, addr, next, prot, pages, nr))
+ if (vmap_pmd_range(pud, addr, next, prot, pages, nr, mask))
return -ENOMEM;
} while (pud++, addr = next, addr != end);
return 0;
}
static int vmap_p4d_range(pgd_t *pgd, unsigned long addr,
- unsigned long end, pgprot_t prot, struct page **pages, int *nr)
+ unsigned long end, pgprot_t prot, struct page **pages, int *nr,
+ pgtbl_mod_mask *mask)
{
p4d_t *p4d;
unsigned long next;
- p4d = p4d_alloc(&init_mm, pgd, addr);
+ p4d = p4d_alloc_track(&init_mm, pgd, addr, mask);
if (!p4d)
return -ENOMEM;
do {
next = p4d_addr_end(addr, end);
- if (vmap_pud_range(p4d, addr, next, prot, pages, nr))
+ if (vmap_pud_range(p4d, addr, next, prot, pages, nr, mask))
return -ENOMEM;
} while (p4d++, addr = next, addr != end);
return 0;
}
-/*
- * Set up page tables in kva (addr, end). The ptes shall have prot "prot", and
- * will have pfns corresponding to the "pages" array.
+/**
+ * map_kernel_range_noflush - map kernel VM area with the specified pages
+ * @addr: start of the VM area to map
+ * @size: size of the VM area to map
+ * @prot: page protection flags to use
+ * @pages: pages to map
*
- * Ie. pte at addr+N*PAGE_SIZE shall point to pfn corresponding to pages[N]
+ * Map PFN_UP(@size) pages at @addr. The VM area @addr and @size specify should
+ * have been allocated using get_vm_area() and its friends.
+ *
+ * NOTE:
+ * This function does NOT do any cache flushing. The caller is responsible for
+ * calling flush_cache_vmap() on to-be-mapped areas before calling this
+ * function.
+ *
+ * RETURNS:
+ * 0 on success, -errno on failure.
*/
-static int vmap_page_range_noflush(unsigned long start, unsigned long end,
- pgprot_t prot, struct page **pages)
+int map_kernel_range_noflush(unsigned long addr, unsigned long size,
+ pgprot_t prot, struct page **pages)
{
- pgd_t *pgd;
+ unsigned long start = addr;
+ unsigned long end = addr + size;
unsigned long next;
- unsigned long addr = start;
+ pgd_t *pgd;
int err = 0;
int nr = 0;
+ pgtbl_mod_mask mask = 0;
BUG_ON(addr >= end);
pgd = pgd_offset_k(addr);
do {
next = pgd_addr_end(addr, end);
- err = vmap_p4d_range(pgd, addr, next, prot, pages, &nr);
+ if (pgd_bad(*pgd))
+ mask |= PGTBL_PGD_MODIFIED;
+ err = vmap_p4d_range(pgd, addr, next, prot, pages, &nr, &mask);
if (err)
return err;
} while (pgd++, addr = next, addr != end);
- return nr;
+ if (mask & ARCH_PAGE_TABLE_SYNC_MASK)
+ arch_sync_kernel_mappings(start, end);
+
+ return 0;
}
-static int vmap_page_range(unsigned long start, unsigned long end,
- pgprot_t prot, struct page **pages)
+int map_kernel_range(unsigned long start, unsigned long size, pgprot_t prot,
+ struct page **pages)
{
int ret;
- ret = vmap_page_range_noflush(start, end, prot, pages);
- flush_cache_vmap(start, end);
+ ret = map_kernel_range_noflush(start, size, prot, pages);
+ flush_cache_vmap(start, start + size);
return ret;
}
EXPORT_SYMBOL_GPL(unregister_vmap_purge_notifier);
/*
- * Clear the pagetable entries of a given vmap_area
- */
-static void unmap_vmap_area(struct vmap_area *va)
-{
- vunmap_page_range(va->va_start, va->va_end);
-}
-
-/*
* lazy_max_pages is the maximum amount of virtual address space we gather up
* before attempting to purge with a TLB flush.
*
return false;
/*
- * First make sure the mappings are removed from all page-tables
- * before they are freed.
- */
- vmalloc_sync_unmappings();
-
- /*
* TODO: to calculate a flush range without looping.
* The list can be up to lazy_max_pages() elements.
*/
static void free_unmap_vmap_area(struct vmap_area *va)
{
flush_cache_vunmap(va->va_start, va->va_end);
- unmap_vmap_area(va);
+ unmap_kernel_range_noflush(va->va_start, va->va_end - va->va_start);
if (debug_pagealloc_enabled_static())
flush_tlb_kernel_range(va->va_start, va->va_end);
return vaddr;
}
-static void vb_free(const void *addr, unsigned long size)
+static void vb_free(unsigned long addr, unsigned long size)
{
unsigned long offset;
unsigned long vb_idx;
BUG_ON(offset_in_page(size));
BUG_ON(size > PAGE_SIZE*VMAP_MAX_ALLOC);
- flush_cache_vunmap((unsigned long)addr, (unsigned long)addr + size);
+ flush_cache_vunmap(addr, addr + size);
order = get_order(size);
- offset = (unsigned long)addr & (VMAP_BLOCK_SIZE - 1);
- offset >>= PAGE_SHIFT;
+ offset = (addr & (VMAP_BLOCK_SIZE - 1)) >> PAGE_SHIFT;
- vb_idx = addr_to_vb_idx((unsigned long)addr);
+ vb_idx = addr_to_vb_idx(addr);
rcu_read_lock();
vb = radix_tree_lookup(&vmap_block_tree, vb_idx);
rcu_read_unlock();
BUG_ON(!vb);
- vunmap_page_range((unsigned long)addr, (unsigned long)addr + size);
+ unmap_kernel_range_noflush(addr, size);
if (debug_pagealloc_enabled_static())
- flush_tlb_kernel_range((unsigned long)addr,
- (unsigned long)addr + size);
+ flush_tlb_kernel_range(addr, addr + size);
spin_lock(&vb->lock);
if (likely(count <= VMAP_MAX_ALLOC)) {
debug_check_no_locks_freed(mem, size);
- vb_free(mem, size);
+ vb_free(addr, size);
return;
}
*
* Returns: a pointer to the address that has been mapped, or %NULL on failure
*/
-void *vm_map_ram(struct page **pages, unsigned int count, int node, pgprot_t prot)
+void *vm_map_ram(struct page **pages, unsigned int count, int node)
{
unsigned long size = (unsigned long)count << PAGE_SHIFT;
unsigned long addr;
kasan_unpoison_vmalloc(mem, size);
- if (vmap_page_range(addr, addr + size, prot, pages) < 0) {
+ if (map_kernel_range(addr, size, PAGE_KERNEL, pages) < 0) {
vm_unmap_ram(mem, count);
return NULL;
}
}
/**
- * map_kernel_range_noflush - map kernel VM area with the specified pages
- * @addr: start of the VM area to map
- * @size: size of the VM area to map
- * @prot: page protection flags to use
- * @pages: pages to map
- *
- * Map PFN_UP(@size) pages at @addr. The VM area @addr and @size
- * specify should have been allocated using get_vm_area() and its
- * friends.
- *
- * NOTE:
- * This function does NOT do any cache flushing. The caller is
- * responsible for calling flush_cache_vmap() on to-be-mapped areas
- * before calling this function.
- *
- * RETURNS:
- * The number of pages mapped on success, -errno on failure.
- */
-int map_kernel_range_noflush(unsigned long addr, unsigned long size,
- pgprot_t prot, struct page **pages)
-{
- return vmap_page_range_noflush(addr, addr + size, prot, pages);
-}
-
-/**
- * unmap_kernel_range_noflush - unmap kernel VM area
- * @addr: start of the VM area to unmap
- * @size: size of the VM area to unmap
- *
- * Unmap PFN_UP(@size) pages at @addr. The VM area @addr and @size
- * specify should have been allocated using get_vm_area() and its
- * friends.
- *
- * NOTE:
- * This function does NOT do any cache flushing. The caller is
- * responsible for calling flush_cache_vunmap() on to-be-mapped areas
- * before calling this function and flush_tlb_kernel_range() after.
- */
-void unmap_kernel_range_noflush(unsigned long addr, unsigned long size)
-{
- vunmap_page_range(addr, addr + size);
-}
-EXPORT_SYMBOL_GPL(unmap_kernel_range_noflush);
-
-/**
* unmap_kernel_range - unmap kernel VM area and flush cache and TLB
* @addr: start of the VM area to unmap
* @size: size of the VM area to unmap
unsigned long end = addr + size;
flush_cache_vunmap(addr, end);
- vunmap_page_range(addr, end);
+ unmap_kernel_range_noflush(addr, size);
flush_tlb_kernel_range(addr, end);
}
-EXPORT_SYMBOL_GPL(unmap_kernel_range);
-
-int map_vm_area(struct vm_struct *area, pgprot_t prot, struct page **pages)
-{
- unsigned long addr = (unsigned long)area->addr;
- unsigned long end = addr + get_vm_area_size(area);
- int err;
-
- err = vmap_page_range(addr, end, prot, pages);
-
- return err > 0 ? 0 : err;
-}
-EXPORT_SYMBOL_GPL(map_vm_area);
static inline void setup_vmalloc_vm_locked(struct vm_struct *vm,
struct vmap_area *va, unsigned long flags, const void *caller)
return area;
}
-struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
- unsigned long start, unsigned long end)
-{
- return __get_vm_area_node(size, 1, flags, start, end, NUMA_NO_NODE,
- GFP_KERNEL, __builtin_return_address(0));
-}
-EXPORT_SYMBOL_GPL(__get_vm_area);
-
struct vm_struct *__get_vm_area_caller(unsigned long size, unsigned long flags,
unsigned long start, unsigned long end,
const void *caller)
* Use raw_cpu_ptr() because this can be called from preemptible
* context. Preemption is absolutely fine here, because the llist_add()
* implementation is lockless, so it works even if we are adding to
- * nother cpu's list. schedule_work() should be fine with this too.
+ * another cpu's list. schedule_work() should be fine with this too.
*/
struct vfree_deferred *p = raw_cpu_ptr(&vfree_deferred);
if (!area)
return NULL;
- if (map_vm_area(area, prot, pages)) {
+ if (map_kernel_range((unsigned long)area->addr, size, pgprot_nx(prot),
+ pages) < 0) {
vunmap(area->addr);
return NULL;
}
}
EXPORT_SYMBOL(vmap);
-static void *__vmalloc_node(unsigned long size, unsigned long align,
- gfp_t gfp_mask, pgprot_t prot,
- int node, const void *caller);
static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
pgprot_t prot, int node)
{
/* Please note that the recursion is strictly bounded. */
if (array_size > PAGE_SIZE) {
pages = __vmalloc_node(array_size, 1, nested_gfp|highmem_mask,
- PAGE_KERNEL, node, area->caller);
+ node, area->caller);
} else {
pages = kmalloc_node(array_size, nested_gfp, node);
}
}
atomic_long_add(area->nr_pages, &nr_vmalloc_pages);
- if (map_vm_area(area, prot, pages))
+ if (map_kernel_range((unsigned long)area->addr, get_vm_area_size(area),
+ prot, pages) < 0)
goto fail;
+
return area->addr;
fail:
return NULL;
}
-/*
- * This is only for performance analysis of vmalloc and stress purpose.
- * It is required by vmalloc test module, therefore do not use it other
- * than that.
- */
-#ifdef CONFIG_TEST_VMALLOC_MODULE
-EXPORT_SYMBOL_GPL(__vmalloc_node_range);
-#endif
-
/**
* __vmalloc_node - allocate virtually contiguous memory
* @size: allocation size
* @align: desired alignment
* @gfp_mask: flags for the page level allocator
- * @prot: protection mask for the allocated pages
* @node: node to use for allocation or NUMA_NO_NODE
* @caller: caller's return address
*
- * Allocate enough pages to cover @size from the page level
- * allocator with @gfp_mask flags. Map them into contiguous
- * kernel virtual space, using a pagetable protection of @prot.
+ * Allocate enough pages to cover @size from the page level allocator with
+ * @gfp_mask flags. Map them into contiguous kernel virtual space.
*
* Reclaim modifiers in @gfp_mask - __GFP_NORETRY, __GFP_RETRY_MAYFAIL
* and __GFP_NOFAIL are not supported
*
* Return: pointer to the allocated memory or %NULL on error
*/
-static void *__vmalloc_node(unsigned long size, unsigned long align,
- gfp_t gfp_mask, pgprot_t prot,
- int node, const void *caller)
+void *__vmalloc_node(unsigned long size, unsigned long align,
+ gfp_t gfp_mask, int node, const void *caller)
{
return __vmalloc_node_range(size, align, VMALLOC_START, VMALLOC_END,
- gfp_mask, prot, 0, node, caller);
+ gfp_mask, PAGE_KERNEL, 0, node, caller);
}
+/*
+ * This is only for performance analysis of vmalloc and stress purpose.
+ * It is required by vmalloc test module, therefore do not use it other
+ * than that.
+ */
+#ifdef CONFIG_TEST_VMALLOC_MODULE
+EXPORT_SYMBOL_GPL(__vmalloc_node);
+#endif
-void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot)
+void *__vmalloc(unsigned long size, gfp_t gfp_mask)
{
- return __vmalloc_node(size, 1, gfp_mask, prot, NUMA_NO_NODE,
+ return __vmalloc_node(size, 1, gfp_mask, NUMA_NO_NODE,
__builtin_return_address(0));
}
EXPORT_SYMBOL(__vmalloc);
-static inline void *__vmalloc_node_flags(unsigned long size,
- int node, gfp_t flags)
-{
- return __vmalloc_node(size, 1, flags, PAGE_KERNEL,
- node, __builtin_return_address(0));
-}
-
-
-void *__vmalloc_node_flags_caller(unsigned long size, int node, gfp_t flags,
- void *caller)
-{
- return __vmalloc_node(size, 1, flags, PAGE_KERNEL, node, caller);
-}
-
/**
* vmalloc - allocate virtually contiguous memory
* @size: allocation size
*/
void *vmalloc(unsigned long size)
{
- return __vmalloc_node_flags(size, NUMA_NO_NODE,
- GFP_KERNEL);
+ return __vmalloc_node(size, 1, GFP_KERNEL, NUMA_NO_NODE,
+ __builtin_return_address(0));
}
EXPORT_SYMBOL(vmalloc);
*/
void *vzalloc(unsigned long size)
{
- return __vmalloc_node_flags(size, NUMA_NO_NODE,
- GFP_KERNEL | __GFP_ZERO);
+ return __vmalloc_node(size, 1, GFP_KERNEL | __GFP_ZERO, NUMA_NO_NODE,
+ __builtin_return_address(0));
}
EXPORT_SYMBOL(vzalloc);
*/
void *vmalloc_node(unsigned long size, int node)
{
- return __vmalloc_node(size, 1, GFP_KERNEL, PAGE_KERNEL,
- node, __builtin_return_address(0));
+ return __vmalloc_node(size, 1, GFP_KERNEL, node,
+ __builtin_return_address(0));
}
EXPORT_SYMBOL(vmalloc_node);
* allocator and map them into contiguous kernel virtual space.
* The memory allocated is set to zero.
*
- * For tight control over page level allocator and protection flags
- * use __vmalloc_node() instead.
- *
* Return: pointer to the allocated memory or %NULL on error
*/
void *vzalloc_node(unsigned long size, int node)
{
- return __vmalloc_node_flags(size, node,
- GFP_KERNEL | __GFP_ZERO);
+ return __vmalloc_node(size, 1, GFP_KERNEL | __GFP_ZERO, node,
+ __builtin_return_address(0));
}
EXPORT_SYMBOL(vzalloc_node);
/**
- * vmalloc_user_node_flags - allocate memory for userspace on a specific node
- * @size: allocation size
- * @node: numa node
- * @flags: flags for the page level allocator
- *
- * The resulting memory area is zeroed so it can be mapped to userspace
- * without leaking data.
- *
- * Return: pointer to the allocated memory or %NULL on error
- */
-void *vmalloc_user_node_flags(unsigned long size, int node, gfp_t flags)
-{
- return __vmalloc_node_range(size, SHMLBA, VMALLOC_START, VMALLOC_END,
- flags | __GFP_ZERO, PAGE_KERNEL,
- VM_USERMAP, node,
- __builtin_return_address(0));
-}
-EXPORT_SYMBOL(vmalloc_user_node_flags);
-
-/**
* vmalloc_exec - allocate virtually contiguous, executable memory
* @size: allocation size
*
*/
void *vmalloc_32(unsigned long size)
{
- return __vmalloc_node(size, 1, GFP_VMALLOC32, PAGE_KERNEL,
- NUMA_NO_NODE, __builtin_return_address(0));
+ return __vmalloc_node(size, 1, GFP_VMALLOC32, NUMA_NO_NODE,
+ __builtin_return_address(0));
}
EXPORT_SYMBOL(vmalloc_32);
* @vma: vma to cover
* @uaddr: target user address to start at
* @kaddr: virtual address of vmalloc kernel memory
+ * @pgoff: offset from @kaddr to start at
* @size: size of map area
*
* Returns: 0 for success, -Exxx on failure
* Similar to remap_pfn_range() (see mm/memory.c)
*/
int remap_vmalloc_range_partial(struct vm_area_struct *vma, unsigned long uaddr,
- void *kaddr, unsigned long size)
+ void *kaddr, unsigned long pgoff,
+ unsigned long size)
{
struct vm_struct *area;
+ unsigned long off;
+ unsigned long end_index;
+
+ if (check_shl_overflow(pgoff, PAGE_SHIFT, &off))
+ return -EINVAL;
size = PAGE_ALIGN(size);
if (!(area->flags & (VM_USERMAP | VM_DMA_COHERENT)))
return -EINVAL;
- if (kaddr + size > area->addr + get_vm_area_size(area))
+ if (check_add_overflow(size, off, &end_index) ||
+ end_index > get_vm_area_size(area))
return -EINVAL;
+ kaddr += off;
do {
struct page *page = vmalloc_to_page(kaddr);
unsigned long pgoff)
{
return remap_vmalloc_range_partial(vma, vma->vm_start,
- addr + (pgoff << PAGE_SHIFT),
+ addr, pgoff,
vma->vm_end - vma->vm_start);
}
EXPORT_SYMBOL(remap_vmalloc_range);
-/*
- * Implement stubs for vmalloc_sync_[un]mappings () if the architecture chose
- * not to have one.
- *
- * The purpose of this function is to make sure the vmalloc area
- * mappings are identical in all page-tables in the system.
- */
-void __weak vmalloc_sync_mappings(void)
-{
-}
-
-void __weak vmalloc_sync_unmappings(void)
-{
-}
-
static int f(pte_t *pte, unsigned long addr, void *data)
{
pte_t ***p = data;
goto overflow;
/*
- * If required width exeeds current VA block, move
+ * If required width exceeds current VA block, move
* base downwards and then recheck.
*/
if (base + end > va->va_end) {
projects / platform / kernel / linux-rpi.git / blobdiff