DEFINE_RWLOCK(vmlist_lock);
struct vm_struct *vmlist;
+static void *__vmalloc_node(unsigned long size, gfp_t gfp_mask, pgprot_t prot,
+ int node);
+
static void vunmap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end)
{
pte_t *pte;
return err;
}
-struct vm_struct *__get_vm_area_node(unsigned long size, unsigned long flags,
- unsigned long start, unsigned long end, int node)
+static struct vm_struct *__get_vm_area_node(unsigned long size, unsigned long flags,
+ unsigned long start, unsigned long end,
+ int node, gfp_t gfp_mask)
{
struct vm_struct **p, *tmp, *area;
unsigned long align = 1;
unsigned long addr;
+ BUG_ON(in_interrupt());
if (flags & VM_IOREMAP) {
int bit = fls(size);
}
addr = ALIGN(start, align);
size = PAGE_ALIGN(size);
-
- area = kmalloc_node(sizeof(*area), GFP_KERNEL, node);
- if (unlikely(!area))
+ if (unlikely(!size))
return NULL;
- if (unlikely(!size)) {
- kfree (area);
+ area = kmalloc_node(sizeof(*area), gfp_mask & GFP_LEVEL_MASK, node);
+ if (unlikely(!area))
return NULL;
- }
/*
* We always allocate a guard page.
struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
unsigned long start, unsigned long end)
{
- return __get_vm_area_node(size, flags, start, end, -1);
+ return __get_vm_area_node(size, flags, start, end, -1, GFP_KERNEL);
}
/**
* get_vm_area - reserve a contingous kernel virtual area
- *
* @size: size of the area
* @flags: %VM_IOREMAP for I/O mappings or VM_ALLOC
*
return __get_vm_area(size, flags, VMALLOC_START, VMALLOC_END);
}
-struct vm_struct *get_vm_area_node(unsigned long size, unsigned long flags, int node)
+struct vm_struct *get_vm_area_node(unsigned long size, unsigned long flags,
+ int node, gfp_t gfp_mask)
{
- return __get_vm_area_node(size, flags, VMALLOC_START, VMALLOC_END, node);
+ return __get_vm_area_node(size, flags, VMALLOC_START, VMALLOC_END, node,
+ gfp_mask);
}
/* Caller must hold vmlist_lock */
}
/* Caller must hold vmlist_lock */
-struct vm_struct *__remove_vm_area(void *addr)
+static struct vm_struct *__remove_vm_area(void *addr)
{
struct vm_struct **p, *tmp;
/**
* remove_vm_area - find and remove a contingous kernel virtual area
- *
* @addr: base address
*
* Search for the kernel VM area starting at @addr, and remove it.
/**
* vfree - release memory allocated by vmalloc()
- *
* @addr: memory base address
*
* Free the virtually contiguous memory area starting at @addr, as
/**
* vunmap - release virtual mapping obtained by vmap()
- *
* @addr: memory base address
*
* Free the virtually contiguous memory area starting at @addr,
/**
* vmap - map an array of pages into virtually contiguous space
- *
* @pages: array of page pointers
* @count: number of pages to map
* @flags: vm_area->flags
if (array_size > PAGE_SIZE) {
pages = __vmalloc_node(array_size, gfp_mask, PAGE_KERNEL, node);
area->flags |= VM_VPAGES;
- } else
- pages = kmalloc_node(array_size, (gfp_mask & ~__GFP_HIGHMEM), node);
+ } else {
+ pages = kmalloc_node(array_size,
+ (gfp_mask & ~(__GFP_HIGHMEM | __GFP_ZERO)),
+ node);
+ }
area->pages = pages;
if (!area->pages) {
remove_vm_area(area->addr);
/**
* __vmalloc_node - allocate virtually contiguous memory
- *
* @size: allocation size
* @gfp_mask: flags for the page level allocator
* @prot: protection mask for the allocated pages
* allocator with @gfp_mask flags. Map them into contiguous
* kernel virtual space, using a pagetable protection of @prot.
*/
-void *__vmalloc_node(unsigned long size, gfp_t gfp_mask, pgprot_t prot,
- int node)
+static void *__vmalloc_node(unsigned long size, gfp_t gfp_mask, pgprot_t prot,
+ int node)
{
struct vm_struct *area;
if (!size || (size >> PAGE_SHIFT) > num_physpages)
return NULL;
- area = get_vm_area_node(size, VM_ALLOC, node);
+ area = get_vm_area_node(size, VM_ALLOC, node, gfp_mask);
if (!area)
return NULL;
return __vmalloc_area_node(area, gfp_mask, prot, node);
}
-EXPORT_SYMBOL(__vmalloc_node);
void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot)
{
/**
* vmalloc - allocate virtually contiguous memory
- *
* @size: allocation size
- *
* Allocate enough pages to cover @size from the page level
* allocator and map them into contiguous kernel virtual space.
*
- * For tight cotrol over page level allocator and protection flags
+ * For tight control over page level allocator and protection flags
* use __vmalloc() instead.
*/
void *vmalloc(unsigned long size)
EXPORT_SYMBOL(vmalloc);
/**
- * vmalloc_user - allocate virtually contiguous memory which has
- * been zeroed so it can be mapped to userspace without
- * leaking data.
+ * vmalloc_user - allocate zeroed virtually contiguous memory for userspace
+ * @size: allocation size
*
- * @size: allocation size
+ * The resulting memory area is zeroed so it can be mapped to userspace
+ * without leaking data.
*/
void *vmalloc_user(unsigned long size)
{
void *ret;
ret = __vmalloc(size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO, PAGE_KERNEL);
- write_lock(&vmlist_lock);
- area = __find_vm_area(ret);
- area->flags |= VM_USERMAP;
- write_unlock(&vmlist_lock);
-
+ if (ret) {
+ write_lock(&vmlist_lock);
+ area = __find_vm_area(ret);
+ area->flags |= VM_USERMAP;
+ write_unlock(&vmlist_lock);
+ }
return ret;
}
EXPORT_SYMBOL(vmalloc_user);
/**
* vmalloc_node - allocate memory on a specific node
- *
* @size: allocation size
* @node: numa node
*
* Allocate enough pages to cover @size from the page level
* allocator and map them into contiguous kernel virtual space.
*
- * For tight cotrol over page level allocator and protection flags
+ * For tight control over page level allocator and protection flags
* use __vmalloc() instead.
*/
void *vmalloc_node(unsigned long size, int node)
/**
* vmalloc_exec - allocate virtually contiguous, executable memory
- *
* @size: allocation size
*
* Kernel-internal function to allocate enough pages to cover @size
* the page level allocator and map them into contiguous and
* executable kernel virtual space.
*
- * For tight cotrol over page level allocator and protection flags
+ * For tight control over page level allocator and protection flags
* use __vmalloc() instead.
*/
/**
* vmalloc_32 - allocate virtually contiguous memory (32bit addressable)
- *
* @size: allocation size
*
* Allocate enough 32bit PA addressable pages to cover @size from the
EXPORT_SYMBOL(vmalloc_32);
/**
- * vmalloc_32_user - allocate virtually contiguous memory (32bit
- * addressable) which is zeroed so it can be
- * mapped to userspace without leaking data.
- *
+ * vmalloc_32_user - allocate zeroed virtually contiguous 32bit memory
* @size: allocation size
+ *
+ * The resulting memory area is 32bit addressable and zeroed so it can be
+ * mapped to userspace without leaking data.
*/
void *vmalloc_32_user(unsigned long size)
{
void *ret;
ret = __vmalloc(size, GFP_KERNEL | __GFP_ZERO, PAGE_KERNEL);
- write_lock(&vmlist_lock);
- area = __find_vm_area(ret);
- area->flags |= VM_USERMAP;
- write_unlock(&vmlist_lock);
-
+ if (ret) {
+ write_lock(&vmlist_lock);
+ area = __find_vm_area(ret);
+ area->flags |= VM_USERMAP;
+ write_unlock(&vmlist_lock);
+ }
return ret;
}
EXPORT_SYMBOL(vmalloc_32_user);
/**
* remap_vmalloc_range - map vmalloc pages to userspace
- *
* @vma: vma to cover (map full range of vma)
* @addr: vmalloc memory
* @pgoff: number of pages into addr before first page to map
git.samba.org / sfrench / cifs-2.6.git / blobdiff