x86/xen: prepare p2m list for memory hotplug

[cascardo/linux.git] / fs / char_dev.c

diff --git a/fs/char_dev.c b/fs/char_dev.c
index 67b2007..ea06a3d 100644 (file)
--- a/fs/char_dev.c
+++ b/fs/char_dev.c
@@ -24,27 +24,6 @@
 
 #include "internal.h"
 
-/*
- * capabilities for /dev/mem, /dev/kmem and similar directly mappable character
- * devices
- * - permits shared-mmap for read, write and/or exec
- * - does not permit private mmap in NOMMU mode (can't do COW)
- * - no readahead or I/O queue unplugging required
- */
-struct backing_dev_info directly_mappable_cdev_bdi = {
-       .name = "char",
-       .capabilities   = (
-#ifdef CONFIG_MMU
-               /* permit private copies of the data to be taken */
-               BDI_CAP_MAP_COPY |
-#endif
-               /* permit direct mmap, for read, write or exec */
-               BDI_CAP_MAP_DIRECT |
-               BDI_CAP_READ_MAP | BDI_CAP_WRITE_MAP | BDI_CAP_EXEC_MAP |
-               /* no writeback happens */
-               BDI_CAP_NO_ACCT_AND_WRITEBACK),
-};
-
 static struct kobj_map *cdev_map;
 
 static DEFINE_MUTEX(chrdevs_lock);
@@ -575,8 +554,6 @@ static struct kobject *base_probe(dev_t dev, int *part, void *data)
 void __init chrdev_init(void)
 {
        cdev_map = kobj_map_init(base_probe, &chrdevs_lock);
-       if (bdi_init(&directly_mappable_cdev_bdi))
-               panic("Failed to init directly mappable cdev bdi");
 }
 
 
@@ -590,4 +567,3 @@ EXPORT_SYMBOL(cdev_del);
 EXPORT_SYMBOL(cdev_add);
 EXPORT_SYMBOL(__register_chrdev);
 EXPORT_SYMBOL(__unregister_chrdev);
-EXPORT_SYMBOL(directly_mappable_cdev_bdi);