[PATCH] base-small: shrink console buffer

CONFIG_BASE_SMALL reduce console transfer buffer
Signed-off-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/linux/vt_kern.h

@@ -84,7 +84,8 @@ void reset_vc(struct vc_data *vc);
  * vc_screen.c shares this temporary buffer with the console write code so that
  * we can easily avoid touching user space while holding the console spinlock.
  */
-#define CON_BUF_SIZE	PAGE_SIZE
+
+#define CON_BUF_SIZE (CONFIG_BASE_SMALL ? 256 : PAGE_SIZE)
 extern char con_buf[CON_BUF_SIZE];
 extern struct semaphore con_buf_sem;