[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>

4 files changed, 4 insertions, 4 deletions

diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c
index 2fa566fa6da4..d7de175d53f0 100644
--- a/drivers/s390/char/con3215.c
+++ b/drivers/s390/char/con3215.c
@@ -1103,7 +1103,7 @@ tty3215_start(struct tty_struct *tty)
         }
 }
 
-static struct tty_operations tty3215_ops = {
+static const struct tty_operations tty3215_ops = {
         .open = tty3215_open,
         .close = tty3215_close,
         .write = tty3215_write,
diff --git a/drivers/s390/char/sclp_tty.c b/drivers/s390/char/sclp_tty.c
index f6cf9023039e..6f43e04dbefd 100644
--- a/drivers/s390/char/sclp_tty.c
+++ b/drivers/s390/char/sclp_tty.c
@@ -711,7 +711,7 @@ static struct sclp_register sclp_input_event =
         .receiver_fn = sclp_tty_receiver
 };
 
-static struct tty_operations sclp_ops = {
+static const struct tty_operations sclp_ops = {
         .open = sclp_tty_open,
         .close = sclp_tty_close,
         .write = sclp_tty_write,
diff --git a/drivers/s390/char/sclp_vt220.c b/drivers/s390/char/sclp_vt220.c
index 54fba6f17188..723bf4191bfe 100644
--- a/drivers/s390/char/sclp_vt220.c
+++ b/drivers/s390/char/sclp_vt220.c
@@ -655,7 +655,7 @@ __sclp_vt220_init(int early)
         return 0;
 }
 
-static struct tty_operations sclp_vt220_ops = {
+static const struct tty_operations sclp_vt220_ops = {
         .open = sclp_vt220_open,
         .close = sclp_vt220_close,
         .write = sclp_vt220_write,
diff --git a/drivers/s390/char/tty3270.c b/drivers/s390/char/tty3270.c
index 06e2eeec8473..4717c3611601 100644
--- a/drivers/s390/char/tty3270.c
+++ b/drivers/s390/char/tty3270.c
@@ -1737,7 +1737,7 @@ tty3270_ioctl(struct tty_struct *tty, struct file *file,
         return kbd_ioctl(tp->kbd, file, cmd, arg);
 }
 
-static struct tty_operations tty3270_ops = {
+static const struct tty_operations tty3270_ops = {
         .open = tty3270_open,
         .close = tty3270_close,
         .write = tty3270_write,