hugetlb: cleanup hugetlb.h

Make a couple of small cleanups to linux/include/hugetlb.h.  The
set_file_hugepages() function, which was not used anywhere is removed,
and the hugetlbfs_config and hugetlbfs_inode_info structures with its
HUGETLBFS_I helper function are moved into inode.c, the only place they
were used.

These structures are really linked to the hugetlbfs filesystem
specifically not to hugepage mm handling in general, so they belong in
the filesystem code not in a generally available header.

It would be nice to move the hugetlbfs_sb_info (superblock) structure in
there as well, but it's currently needed in a number of places via the
hstate_vma() and hstate_inode().

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Cc: Hugh Dickins <hughd@google.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Andrew Barry <abarry@cray.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Minchan Kim <minchan.kim@gmail.com>
Cc: Hillf Danton <dhillf@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 19 insertions, 25 deletions

diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 19654cfe780b..4fbd9fccd550 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -41,6 +41,25 @@ const struct file_operations hugetlbfs_file_operations;
 static const struct inode_operations hugetlbfs_dir_inode_operations;
 static const struct inode_operations hugetlbfs_inode_operations;
 
+struct hugetlbfs_config {
+        uid_t   uid;
+        gid_t   gid;
+        umode_t mode;
+        long    nr_blocks;
+        long    nr_inodes;
+        struct hstate *hstate;
+};
+
+struct hugetlbfs_inode_info {
+        struct shared_policy policy;
+        struct inode vfs_inode;
+};
+
+static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode)
+{
+        return container_of(inode, struct hugetlbfs_inode_info, vfs_inode);
+}
+
 static struct backing_dev_info hugetlbfs_backing_dev_info = {
         .name           = "hugetlbfs",
         .ra_pages       = 0,    /* No readahead */
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index d9d6c868b86b..7adc4923e7ac 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -128,15 +128,6 @@ enum {
 };
 
 #ifdef CONFIG_HUGETLBFS
-struct hugetlbfs_config {
-        uid_t   uid;
-        gid_t   gid;
-        umode_t mode;
-        long    nr_blocks;
-        long    nr_inodes;
-        struct hstate *hstate;
-};
-
 struct hugetlbfs_sb_info {
         long    max_blocks;   /* blocks allowed */
         long    free_blocks;  /* blocks free */
@@ -146,17 +137,6 @@ struct hugetlbfs_sb_info {
         struct hstate *hstate;
 };
 
-
-struct hugetlbfs_inode_info {
-        struct shared_policy policy;
-        struct inode vfs_inode;
-};
-
-static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode)
-{
-        return container_of(inode, struct hugetlbfs_inode_info, vfs_inode);
-}
-
 static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb)
 {
         return sb->s_fs_info;
@@ -179,14 +159,9 @@ static inline int is_file_hugepages(struct file *file)
         return 0;
 }
 
-static inline void set_file_hugepages(struct file *file)
-{
-        file->f_op = &hugetlbfs_file_operations;
-}
 #else /* !CONFIG_HUGETLBFS */
 
 #define is_file_hugepages(file)                 0
-#define set_file_hugepages(file)                BUG()
 static inline struct file *hugetlb_file_setup(const char *name, size_t size,
                 vm_flags_t acctflag, struct user_struct **user, int creat_flags)
 {