[PATCH] limit CONFIG_LEGACY_PTY_COUNT

Limit the number of legacy ptys to 256.  pty_line_name() isn't capable of
generating more than 256 unique names.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/char/Kconfig

@@ -478,6 +478,7 @@ config LEGACY_PTYS
 config LEGACY_PTY_COUNT
 	int "Maximum number of legacy PTY in use"
 	depends on LEGACY_PTYS
+	range 1 256
 	default "256"
 	---help---
 	  The maximum number of legacy PTYs that can be used at any one time.