[PATCH] Fix get_unmapped_area and fsync for hugetlb shm segments
[linux-2.6.git] / ipc / shm.c
index 3d0eb79..4fefbad 100644 (file)
--- 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,
 };