tty_audit: make tty pointers in exposed functions const

Both tty_audit_add_data() and tty_audit_tiocsti() need only to read from
the tty struct, so make the tty parameters of them both const. This
aids the compiler a bit.

Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Link: https://lore.kernel.org/r/20230621101611.10580-6-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/tty.h b/drivers/tty/tty.h
index 1e0d80e98d263965835d9d594bd69e1071201f7c..89769a1f1f9725f278f10a07ea43dcc9d8ebc7f4 100644 (file)
--- a/drivers/tty/tty.h
+++ b/drivers/tty/tty.h
@@ -99,14 +99,15 @@ extern int tty_ldisc_autoload;
 
 /* tty_audit.c */
 #ifdef CONFIG_AUDIT
-void tty_audit_add_data(struct tty_struct *tty, const void *data, size_t size);
-void tty_audit_tiocsti(struct tty_struct *tty, char ch);
+void tty_audit_add_data(const struct tty_struct *tty, const void *data,
+                       size_t size);
+void tty_audit_tiocsti(const struct tty_struct *tty, char ch);
 #else
-static inline void tty_audit_add_data(struct tty_struct *tty, const void *data,
-                                     size_t size)
+static inline void tty_audit_add_data(const struct tty_struct *tty,
+                                     const void *data, size_t size)
 {
 }
-static inline void tty_audit_tiocsti(struct tty_struct *tty, char ch)
+static inline void tty_audit_tiocsti(const struct tty_struct *tty, char ch)
 {
 }
 #endif

diff --git a/drivers/tty/tty_audit.c b/drivers/tty/tty_audit.c
index 6cf8b63368ee350e767951a3c96083a38e031ea3..5cbe28ac1763d7075ddc30fd7fb5c01e3a91760f 100644 (file)
--- a/drivers/tty/tty_audit.c
+++ b/drivers/tty/tty_audit.c
@@ -134,7 +134,7 @@ void tty_audit_fork(struct signal_struct *sig)
 /*
  *     tty_audit_tiocsti       -       Log TIOCSTI
  */
-void tty_audit_tiocsti(struct tty_struct *tty, char ch)
+void tty_audit_tiocsti(const struct tty_struct *tty, char ch)
 {
        dev_t dev;
 
@@ -199,7 +199,8 @@ static struct tty_audit_buf *tty_audit_buf_get(void)
  *
  *     Audit @data of @size from @tty, if necessary.
  */
-void tty_audit_add_data(struct tty_struct *tty, const void *data, size_t size)
+void tty_audit_add_data(const struct tty_struct *tty, const void *data,
+                       size_t size)
 {
        struct tty_audit_buf *buf;
        unsigned int audit_tty;