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| author |   Emil Velikov <emil.l.velikov@gmail.com> | 2020-05-13 22:43:42 +0100 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-05-15 14:53:19 +0200 |
| commit | 23cbedf812ff7c7751582928e32d953d84c1c821 (patch) | |
| tree | 4b055d22cf349acc2b1c311a06fc4fea4f7239bb /drivers/tty | |
| parent | tty/sysrq: alpha: export and use __sysrq_get_key_op() (diff) | |
| download | wireguard-linux-23cbedf812ff7c7751582928e32d953d84c1c821.tar.xz wireguard-linux-23cbedf812ff7c7751582928e32d953d84c1c821.zip | |
tty/sysrq: constify the sysrq API
The user is not supposed to thinker with the underlying sysrq_key_op.
Make that explicit by adding a handful of const notations.
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Link: https://lore.kernel.org/r/20200513214351.2138580-2-emil.l.velikov@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/sysrq.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c index 1741134cabca..091c64a3cef0 100644 --- a/drivers/tty/sysrq.c +++ b/drivers/tty/sysrq.c @@ -518,9 +518,9 @@ static int sysrq_key_table_key2index(int key) /* * get and put functions for the table, exposed to modules. */ -static struct sysrq_key_op *__sysrq_get_key_op(int key) +static const struct sysrq_key_op *__sysrq_get_key_op(int key) { - struct sysrq_key_op *op_p = NULL; + const struct sysrq_key_op *op_p = NULL; int i; i = sysrq_key_table_key2index(key); @@ -530,7 +530,7 @@ static struct sysrq_key_op *__sysrq_get_key_op(int key) return op_p; } -static void __sysrq_put_key_op(int key, struct sysrq_key_op *op_p) +static void __sysrq_put_key_op(int key, const struct sysrq_key_op *op_p) { int i = sysrq_key_table_key2index(key); @@ -540,7 +540,7 @@ static void __sysrq_put_key_op(int key, struct sysrq_key_op *op_p) void __handle_sysrq(int key, bool check_mask) { - struct sysrq_key_op *op_p; + const struct sysrq_key_op *op_p; int orig_log_level; int orig_suppress_printk; int i; @@ -1063,8 +1063,8 @@ int sysrq_toggle_support(int enable_mask) } EXPORT_SYMBOL_GPL(sysrq_toggle_support); -static int __sysrq_swap_key_ops(int key, struct sysrq_key_op *insert_op_p, - struct sysrq_key_op *remove_op_p) +static int __sysrq_swap_key_ops(int key, const struct sysrq_key_op *insert_op_p, + const struct sysrq_key_op *remove_op_p) { int retval; @@ -1087,13 +1087,13 @@ static int __sysrq_swap_key_ops(int key, struct sysrq_key_op *insert_op_p, return retval; } -int register_sysrq_key(int key, struct sysrq_key_op *op_p) +int register_sysrq_key(int key, const struct sysrq_key_op *op_p) { return __sysrq_swap_key_ops(key, op_p, NULL); } EXPORT_SYMBOL(register_sysrq_key); -int unregister_sysrq_key(int key, struct sysrq_key_op *op_p) +int unregister_sysrq_key(int key, const struct sysrq_key_op *op_p) { return __sysrq_swap_key_ops(key, NULL, op_p); } |