/*
* ramdisk.c - Multiple RAM disk driver - gzip-loading version - v. 0.8 beta.
- *
- * (C) Chad Page, Theodore Ts'o, et. al, 1995.
+ *
+ * (C) Chad Page, Theodore Ts'o, et. al, 1995.
*
* This RAM disk is designed to have filesystems created on it and mounted
- * just like a regular floppy disk.
- *
+ * just like a regular floppy disk.
+ *
* It also does something suggested by Linus: use the buffer cache as the
* RAM disk data. This makes it possible to dynamically allocate the RAM disk
- * buffer - with some consequences I have to deal with as I write this.
- *
+ * buffer - with some consequences I have to deal with as I write this.
+ *
* This code is based on the original ramdisk.c, written mostly by
* Theodore Ts'o (TYT) in 1991. The code was largely rewritten by
* Chad Page to use the buffer cache to store the RAM disk data in
*
* Added initrd: Werner Almesberger & Hans Lermen, Feb '96
*
- * 4/25/96 : Made RAM disk size a parameter (default is now 4 MB)
+ * 4/25/96 : Made RAM disk size a parameter (default is now 4 MB)
* - Chad Page
*
* Add support for fs images split across >1 disk, Paul Gortmaker, Mar '98
#include <asm/uaccess.h>
/* The RAM disk size is now a parameter */
-#define NUM_RAMDISKS 16 /* This cannot be overridden (yet) */
+#define NUM_RAMDISKS 16 /* This cannot be overridden (yet) */
/* Various static variables go here. Most are used only in the RAM disk code.
*/
* Parameters for the boot-loading of the RAM disk. These are set by
* init/main.c (from arguments to the kernel command line) or from the
* architecture-specific setup routine (from the stored boot sector
- * information).
+ * information).
*/
int rd_size = CONFIG_BLK_DEV_RAM_SIZE; /* Size of the RAM disks */
/*
* 2000 Transmeta Corp.
* aops copied from ramfs.
*/
-static int ramdisk_readpage(struct file *file, struct page * page)
+static int ramdisk_readpage(struct file *file, struct page *page)
{
if (!PageUptodate(page)) {
void *kaddr = kmap_atomic(page, KM_USER0);
return 0;
}
-static int ramdisk_prepare_write(struct file *file, struct page *page, unsigned offset, unsigned to)
+static int ramdisk_prepare_write(struct file *file, struct page *page,
+ unsigned offset, unsigned to)
{
if (!PageUptodate(page)) {
void *kaddr = kmap_atomic(page, KM_USER0);
return 0;
}
-static int ramdisk_commit_write(struct file *file, struct page *page, unsigned offset, unsigned to)
+static int ramdisk_commit_write(struct file *file, struct page *page,
+ unsigned offset, unsigned to)
{
return 0;
}
* 19-JAN-1998 Richard Gooch <rgooch@atnf.csiro.au> Added devfs support
*
*/
-static int rd_make_request(request_queue_t * q, struct bio *bio)
+static int rd_make_request(request_queue_t *q, struct bio *bio)
{
struct block_device *bdev = bio->bi_bdev;
struct address_space * mapping = bdev->bd_inode->i_mapping;
return 0;
}
-static int rd_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+static int rd_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
{
int error;
struct block_device *bdev = inode->i_bdev;
if (cmd != BLKFLSBUF)
return -EINVAL;
- /* special: we want to release the ramdisk memory,
- it's not like with the other blockdevices where
- this ioctl only flushes away the buffer cache. */
+ /*
+ * special: we want to release the ramdisk memory, it's not like with
+ * the other blockdevices where this ioctl only flushes away the buffer
+ * cache
+ */
error = -EBUSY;
down(&bdev->bd_sem);
if (bdev->bd_openers <= 2) {
.memory_backed = 1, /* Does not contribute to dirty memory */
};
-static int rd_open(struct inode * inode, struct file * filp)
+static int rd_open(struct inode *inode, struct file *filp)
{
unsigned unit = iminor(inode);
.ioctl = rd_ioctl,
};
-/* Before freeing the module, invalidate all of the protected buffers! */
-static void __exit rd_cleanup (void)
+/*
+ * Before freeing the module, invalidate all of the protected buffers!
+ */
+static void __exit rd_cleanup(void)
{
int i;
- for (i = 0 ; i < NUM_RAMDISKS; i++) {
+ for (i = 0; i < NUM_RAMDISKS; i++) {
struct block_device *bdev = rd_bdev[i];
rd_bdev[i] = NULL;
if (bdev) {
invalidate_bdev(bdev, 1);
- blkdev_put(bdev, BDEV_FILE);
+ blkdev_put(bdev);
}
del_gendisk(rd_disks[i]);
put_disk(rd_disks[i]);
}
devfs_remove("rd");
- unregister_blkdev(RAMDISK_MAJOR, "ramdisk" );
+ unregister_blkdev(RAMDISK_MAJOR, "ramdisk");
}
-/* This is the registration and initialization section of the RAM disk driver */
-static int __init rd_init (void)
+/*
+ * This is the registration and initialization section of the RAM disk driver
+ */
+static int __init rd_init(void)
{
int i;
int err = -ENOMEM;
if (rd_blocksize > PAGE_SIZE || rd_blocksize < 512 ||
- (rd_blocksize & (rd_blocksize-1))) {
+ (rd_blocksize & (rd_blocksize-1))) {
printk("RAMDISK: wrong blocksize %d, reverting to defaults\n",
rd_blocksize);
rd_blocksize = BLOCK_SIZE;
disk->first_minor = i;
disk->fops = &rd_bd_op;
disk->queue = rd_queue[i];
+ disk->flags |= GENHD_FL_SUPPRESS_PARTITION_INFO;
sprintf(disk->disk_name, "ram%d", i);
sprintf(disk->devfs_name, "rd/%d", i);
set_capacity(disk, rd_size * 2);
/* rd_size is given in kB */
printk("RAMDISK driver initialized: "
- "%d RAM disks of %dK size %d blocksize\n",
- NUM_RAMDISKS, rd_size, rd_blocksize);
+ "%d RAM disks of %dK size %d blocksize\n",
+ NUM_RAMDISKS, rd_size, rd_blocksize);
return 0;
out_queue:
projects / linux-flexiantxendom0-3.2.10.git / blobdiff