get_unmapped_area handles MAP_FIXED in hugetlbfs

[safe/jmp/linux-2.6] / fs / hugetlbfs / inode.c

diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 36e5217..fe625cd 100644 (file)
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -22,6 +22,7 @@
 #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>
@@ -33,11 +34,11 @@
 /* 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 */
@@ -58,7 +59,7 @@ static void huge_pagevec_release(struct pagevec *pvec)
 
 static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma)
 {
-       struct inode *inode = file->f_dentry->d_inode;
+       struct inode *inode = file->f_path.dentry->d_inode;
        loff_t len, vma_len;
        int ret;
 
@@ -98,10 +99,7 @@ out:
  * 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)
@@ -115,6 +113,12 @@ hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
        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);
@@ -176,7 +180,7 @@ static int hugetlbfs_commit_write(struct file *file,
 
 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);
@@ -449,10 +453,13 @@ static int hugetlbfs_symlink(struct inode *dir,
 }
 
 /*
- * 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;
 }
 
@@ -513,7 +520,7 @@ static void hugetlbfs_inc_free_inodes(struct hugetlbfs_sb_info *sbinfo)
 }
 
 
-static kmem_cache_t *hugetlbfs_inode_cachep;
+static struct kmem_cache *hugetlbfs_inode_cachep;
 
 static struct inode *hugetlbfs_alloc_inode(struct super_block *sb)
 {
@@ -545,7 +552,7 @@ static const struct address_space_operations hugetlbfs_aops = {
 };
 
 
-static void init_once(void *foo, kmem_cache_t *cachep, unsigned long flags)
+static void init_once(void *foo, struct kmem_cache *cachep, unsigned long flags)
 {
        struct hugetlbfs_inode_info *ei = (struct hugetlbfs_inode_info *)foo;
 
@@ -560,7 +567,7 @@ const struct file_operations hugetlbfs_file_operations = {
        .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,
@@ -573,11 +580,11 @@ static struct inode_operations hugetlbfs_dir_inode_operations = {
        .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,
@@ -774,8 +781,8 @@ struct file *hugetlb_zero_setup(size_t size)
        d_instantiate(dentry, inode);
        inode->i_size = size;
        inode->i_nlink = 0;
-       file->f_vfsmnt = mntget(hugetlbfs_vfsmount);
-       file->f_dentry = dentry;
+       file->f_path.mnt = mntget(hugetlbfs_vfsmount);
+       file->f_path.dentry = dentry;
        file->f_mapping = inode->i_mapping;
        file->f_op = &hugetlbfs_file_operations;
        file->f_mode = FMODE_WRITE | FMODE_READ;