1 files changed, 26 insertions, 6 deletions

diff --git a/ipc/shm.c b/ipc/shm.c
index 3d0eb7940e9c..4fefbad7096d 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -285,21 +285,41 @@ static int shm_release(struct inode *ino, struct file *file)
         return 0;
 }
 
-#ifndef CONFIG_MMU
+static int shm_fsync(struct file *file, struct dentry *dentry, int datasync)
+{
+        int (*fsync) (struct file *, struct dentry *, int datasync);
+        struct shm_file_data *sfd = shm_file_data(file);
+        int ret = -EINVAL;
+
+        fsync = sfd->file->f_op->fsync;
+        if (fsync)
+                ret = fsync(sfd->file, sfd->file->f_path.dentry, datasync);
+        return ret;
+}
+
 static unsigned long shm_get_unmapped_area(struct file *file,
         unsigned long addr, unsigned long len, unsigned long pgoff,
         unsigned long flags)
 {
         struct shm_file_data *sfd = shm_file_data(file);
-        return sfd->file->f_op->get_unmapped_area(sfd->file, addr, len, pgoff,
-                                                        flags);
+        return get_unmapped_area(sfd->file, addr, len, pgoff, flags);
+}
+
+int is_file_shm_hugepages(struct file *file)
+{
+        int ret = 0;
+
+        if (file->f_op == &shm_file_operations) {
+                struct shm_file_data *sfd;
+                sfd = shm_file_data(file);
+                ret = is_file_hugepages(sfd->file);
+        }
+        return ret;
 }
-#else
-#define shm_get_unmapped_area NULL
-#endif
 
 static const struct file_operations shm_file_operations = {
         .mmap           = shm_mmap,
+        .fsync          = shm_fsync,
         .release        = shm_release,
         .get_unmapped_area      = shm_get_unmapped_area,
 };