#include <linux/backing-dev.h>
#include <linux/hugetlb.h>
#include <linux/pagevec.h>
+#include <linux/mman.h>
#include <linux/quotaops.h>
#include <linux/slab.h>
#include <linux/dnotify.h>
/* some random number */
#define HUGETLBFS_MAGIC 0x958458f6
-static struct super_operations hugetlbfs_ops;
+static const struct super_operations hugetlbfs_ops;
static const struct address_space_operations hugetlbfs_aops;
const struct file_operations hugetlbfs_file_operations;
-static struct inode_operations hugetlbfs_dir_inode_operations;
-static struct inode_operations hugetlbfs_inode_operations;
+static const struct inode_operations hugetlbfs_dir_inode_operations;
+static const struct inode_operations hugetlbfs_inode_operations;
static struct backing_dev_info hugetlbfs_backing_dev_info = {
.ra_pages = 0, /* No readahead */
* Called under down_write(mmap_sem).
*/
-#ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
-unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
- unsigned long len, unsigned long pgoff, unsigned long flags);
-#else
+#ifndef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
static unsigned long
hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
unsigned long len, unsigned long pgoff, unsigned long flags)
if (len > TASK_SIZE)
return -ENOMEM;
+ if (flags & MAP_FIXED) {
+ if (prepare_hugepage_range(addr, len, pgoff))
+ return -EINVAL;
+ return addr;
+ }
+
if (addr) {
addr = ALIGN(addr, HPAGE_SIZE);
vma = find_vma(mm, addr);
static void truncate_huge_page(struct page *page)
{
- clear_page_dirty(page);
+ cancel_dirty_page(page, /* No IO accounting for huge pages? */0);
ClearPageUptodate(page);
remove_from_page_cache(page);
put_page(page);
}
/*
- * For direct-IO reads into hugetlb pages
+ * mark the head page dirty
*/
static int hugetlbfs_set_page_dirty(struct page *page)
{
+ struct page *head = compound_head(page);
+
+ SetPageDirty(head);
return 0;
}
{
struct hugetlbfs_inode_info *ei = (struct hugetlbfs_inode_info *)foo;
- if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
- SLAB_CTOR_CONSTRUCTOR)
+ if (flags & SLAB_CTOR_CONSTRUCTOR)
inode_init_once(&ei->vfs_inode);
}
.get_unmapped_area = hugetlb_get_unmapped_area,
};
-static struct inode_operations hugetlbfs_dir_inode_operations = {
+static const struct inode_operations hugetlbfs_dir_inode_operations = {
.create = hugetlbfs_create,
.lookup = simple_lookup,
.link = simple_link,
.setattr = hugetlbfs_setattr,
};
-static struct inode_operations hugetlbfs_inode_operations = {
+static const struct inode_operations hugetlbfs_inode_operations = {
.setattr = hugetlbfs_setattr,
};
-static struct super_operations hugetlbfs_ops = {
+static const struct super_operations hugetlbfs_ops = {
.alloc_inode = hugetlbfs_alloc_inode,
.destroy_inode = hugetlbfs_destroy_inode,
.statfs = hugetlbfs_statfs,
char buf[16];
static atomic_t counter;
+ if (!hugetlbfs_vfsmount)
+ return ERR_PTR(-ENOENT);
+
if (!can_do_hugetlb_shm())
return ERR_PTR(-EPERM);