Staging: zram: Rename ramzswap to zram in documentation

Related changes:
 - Included example to show usage as generic
(non-swap) disk with ext4 filesystem.
 - Renamed rzscontrol to zramconfig to match
with new device naming.
Signed-off-by: NNitin Gupta <ngupta@vflare.org>
Acked-by: NPekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/zram/zram.txt

-ramzswap: Compressed RAM based swap device
--------------------------------------------
+zram: Compressed RAM based block devices
+----------------------------------------
 
 Project home: http://compcache.googlecode.com/
 
 * Introduction
 
-The ramzswap module creates RAM based block devices which can (only) be used as
-swap disks. Pages swapped to these devices are compressed and stored in memory
-itself. See project home for use cases, performance numbers and a lot more.
+The zram module creates RAM based block devices: /dev/ramX (X = 0, 1, ...).
+Pages written to these disks are compressed and stored in memory itself.
+These disks allow very fast I/O and compression provides good amounts of
+memory savings.
 
-Individual ramzswap devices are configured and initialized using rzscontrol
-userspace utility as shown in examples below. See rzscontrol man page for more
-details.
+See project home for use cases, performance numbers and a lot more.
+
+Individual zram devices are configured and initialized using zramconfig
+userspace utility as shown in examples below. See zramconfig man page for
+more details.
 
 * Usage
 
-Following shows a typical sequence of steps for using ramzswap.
+Following shows a typical sequence of steps for using zram.
 
 1) Load Modules:
-	modprobe ramzswap num_devices=4
-	This creates 4 (uninitialized) devices: /dev/ramzswap{0,1,2,3}
+	modprobe zram num_devices=4
+	This creates 4 (uninitialized) devices: /dev/zram{0,1,2,3}
 	(num_devices parameter is optional. Default: 1)
 
 2) Initialize:
-	Use rzscontrol utility to configure and initialize individual
-	ramzswap devices. Example:
-	rzscontrol /dev/ramzswap2 --init # uses default value of disksize_kb
+	Use zramconfig utility to configure and initialize individual
+	zram devices. For example:
+	zramconfig /dev/zram0 --init # uses default value of disksize_kb
+	zramconfig /dev/zram1 --disksize_kb=102400 # 100MB /dev/zram1
 
-	*See rzscontrol man page for more details and examples*
+	*See zramconfig man page for more details and examples*
 
 3) Activate:
-	swapon /dev/ramzswap2 # or any other initialized ramzswap device
+	mkswap /dev/zram0
+	swapon /dev/zram0
+
+	mkfs.ext4 /dev/zram1
+	mount /dev/zram1 /tmp
 
 4) Stats:
-	rzscontrol /dev/ramzswap2 --stats
+	zramconfig /dev/zram0 --stats
+	zramconfig /dev/zram1 --stats
 
 5) Deactivate:
-	swapoff /dev/ramzswap2
+	swapoff /dev/zram0
+	umount /dev/zram1
 
 6) Reset:
-	rzscontrol /dev/ramzswap2 --reset
-	(This frees all the memory allocated for this device).
+	zramconfig /dev/zram0 --reset
+	zramconfig /dev/zram1 --reset
+	(This frees memory allocated for the given device).
 
 
 Please report any problems at: