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authorEmil Velikov <emil.l.velikov@gmail.com>2020-05-14 00:43:42 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-05-15 15:53:19 +0300
commit23cbedf812ff7c7751582928e32d953d84c1c821 (patch)
tree4b055d22cf349acc2b1c311a06fc4fea4f7239bb /include/linux/sysrq.h
parent0f1c9688a194d22bb81953bd85bd18b0115fd17f (diff)
downloadlinux-23cbedf812ff7c7751582928e32d953d84c1c821.tar.xz
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 'include/linux/sysrq.h')
-rw-r--r--include/linux/sysrq.h16
1 files changed, 8 insertions, 8 deletions
diff --git a/include/linux/sysrq.h b/include/linux/sysrq.h
index 9b51f98e5f60..479028391c08 100644
--- a/include/linux/sysrq.h
+++ b/include/linux/sysrq.h
@@ -30,10 +30,10 @@
#define SYSRQ_ENABLE_RTNICE 0x0100
struct sysrq_key_op {
- void (*handler)(int);
- char *help_msg;
- char *action_msg;
- int enable_mask;
+ void (* const handler)(int);
+ const char * const help_msg;
+ const char * const action_msg;
+ const int enable_mask;
};
#ifdef CONFIG_MAGIC_SYSRQ
@@ -45,8 +45,8 @@ struct sysrq_key_op {
void handle_sysrq(int key);
void __handle_sysrq(int key, bool check_mask);
-int register_sysrq_key(int key, struct sysrq_key_op *op);
-int unregister_sysrq_key(int key, struct sysrq_key_op *op);
+int register_sysrq_key(int key, const struct sysrq_key_op *op);
+int unregister_sysrq_key(int key, const struct sysrq_key_op *op);
extern struct sysrq_key_op *__sysrq_reboot_op;
int sysrq_toggle_support(int enable_mask);
@@ -62,12 +62,12 @@ static inline void __handle_sysrq(int key, bool check_mask)
{
}
-static inline int register_sysrq_key(int key, struct sysrq_key_op *op)
+static inline int register_sysrq_key(int key, const struct sysrq_key_op *op)
{
return -EINVAL;
}
-static inline int unregister_sysrq_key(int key, struct sysrq_key_op *op)
+static inline int unregister_sysrq_key(int key, const struct sysrq_key_op *op)
{
return -EINVAL;
}