[PATCH] more raw driver minor numbers

From: Badari Pulavarty <pbadari@us.ibm.com>

Since we have larger dev_t now, here is the patch to support large
number of RAW devices.  The userlevel command "raw" also needs changes to
use this support - which in turn needs new glibc.

drivers/char/Kconfig

@@ -954,6 +954,15 @@ config RAW_DRIVER
 	  Once bound, I/O against /dev/raw/rawN uses efficient zero-copy I/O. 
 	  See the raw(8) manpage for more details.
 
+config MAX_RAW_DEVS
+	int "Maximum number of RAW devices to support (1-8192)"
+	depends on RAW_DRIVER
+	default "256"
+	help
+	  The maximum number of RAW devices that are supported.
+	  Default is 256. Increase this number in case you need lots of
+	  raw devices.
+
 config HANGCHECK_TIMER
 	tristate "Hangcheck timer"
 	depends on X86_64 || X86

drivers/char/raw.c

@@ -20,8 +20,6 @@
 
 #include <asm/uaccess.h>
 
-#define MAX_RAW_MINORS	256
-
 struct raw_device_data {
 	struct block_device *binding;
 	int inuse;

include/linux/raw.h

@@ -13,4 +13,6 @@ struct raw_config_request
 	__u64	block_minor;
 };
 
+#define MAX_RAW_MINORS CONFIG_MAX_RAW_DEVS
+
 #endif /* __LINUX_RAW_H */