[PATCH] const struct tty_operations

As part of an SMP cleanliness pass over UML, I consted a bunch of
structures in order to not have to document their locking.  One of these
structures was a struct tty_operations.  In order to const it in UML
without introducing compiler complaints, the declaration of
tty_set_operations needs to be changed, and then all of its callers need to
be fixed.

This patch declares all struct tty_operations in the tree as const.  In all
cases, they are static and used only as input to tty_set_operations.  As an
extra check, I ran an i386 allyesconfig build which produced no extra
warnings.

53 drivers are affected.  I checked the history of a bunch of them, and in
most cases, there have been only a handful of maintenance changes in the
last six months.  serial_core.c was the busiest one that I looked at.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/char/epca.c b/drivers/char/epca.c
index 86d290e9f307..3baa2ab8cbd4 100644
--- a/drivers/char/epca.c
+++ b/drivers/char/epca.c
@@ -1125,7 +1125,7 @@ static void __exit epca_module_exit(void)
 
 module_exit(epca_module_exit);
 
-static struct tty_operations pc_ops = {
+static const struct tty_operations pc_ops = {
         .open = pc_open,
         .close = pc_close,
         .write = pc_write,