Messages in this thread Patch in this message | | | From | Dmitry Safonov <> | Subject | [PATCH 01/58] sysrq: Remove sysrq_handler_registered | Date | Fri, 13 Dec 2019 00:06:00 +0000 |
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sysrq_toggle_support() can be called in parallel, in return calling input_(un)register_handler(), which fortunately is safe to call in parallel and regardless of registered/unregistered status of sysrq_handler. Remove sysrq_handler_registered as it doesn't have any function there and may confuse reader about possible race.
Signed-off-by: Dmitry Safonov <dima@arista.com> --- drivers/tty/sysrq.c | 9 +-------- 1 file changed, 1 insertion(+), 8 deletions(-)
diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c index 573b2055173c..1d4f317a0e42 100644 --- a/drivers/tty/sysrq.c +++ b/drivers/tty/sysrq.c @@ -967,8 +967,6 @@ static struct input_handler sysrq_handler = { .id_table = sysrq_ids, }; -static bool sysrq_handler_registered; - static inline void sysrq_register_handler(void) { int error; @@ -978,16 +976,11 @@ static inline void sysrq_register_handler(void) error = input_register_handler(&sysrq_handler); if (error) pr_err("Failed to register input handler, error %d", error); - else - sysrq_handler_registered = true; } static inline void sysrq_unregister_handler(void) { - if (sysrq_handler_registered) { - input_unregister_handler(&sysrq_handler); - sysrq_handler_registered = false; - } + input_unregister_handler(&sysrq_handler); } static int sysrq_reset_seq_param_set(const char *buffer, -- 2.24.0
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