[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>

2 files changed, 2 insertions, 2 deletions

diff --git a/arch/v850/kernel/memcons.c b/arch/v850/kernel/memcons.c
index 815f8a43926f..92f514fdcc79 100644
--- a/arch/v850/kernel/memcons.c
+++ b/arch/v850/kernel/memcons.c
@@ -104,7 +104,7 @@ int memcons_tty_chars_in_buffer (struct tty_struct *tty)
         return 0;
 }
 
-static struct tty_operations ops = {
+static const struct tty_operations ops = {
         .open = memcons_tty_open,
         .write = memcons_tty_write,
         .write_room = memcons_tty_write_room,
diff --git a/arch/v850/kernel/simcons.c b/arch/v850/kernel/simcons.c
index 3975aa02cef8..9973596ae304 100644
--- a/arch/v850/kernel/simcons.c
+++ b/arch/v850/kernel/simcons.c
@@ -77,7 +77,7 @@ int simcons_tty_chars_in_buffer (struct tty_struct *tty)
         return 0;
 }
 
-static struct tty_operations ops = {
+static const struct tty_operations ops = {
         .open = simcons_tty_open,
         .write = simcons_tty_write,
         .write_room = simcons_tty_write_room,