diff options
Diffstat (limited to 'arch/um/drivers/mconsole_kern.c')
| -rw-r--r-- | arch/um/drivers/mconsole_kern.c | 48 |
1 files changed, 30 insertions, 18 deletions
diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c index e9bbc14f3655..8b453a7e685c 100644 --- a/arch/um/drivers/mconsole_kern.c +++ b/arch/um/drivers/mconsole_kern.c @@ -463,24 +463,6 @@ void mconsole_remove(struct mc_request *req) mconsole_reply(req, err_msg, err, 0); } -#ifdef CONFIG_MAGIC_SYSRQ -void mconsole_sysrq(struct mc_request *req) -{ - char *ptr = req->request.data; - - ptr += strlen("sysrq"); - while(isspace(*ptr)) ptr++; - - mconsole_reply(req, "", 0, 0); - handle_sysrq(*ptr, ¤t->thread.regs, NULL); -} -#else -void mconsole_sysrq(struct mc_request *req) -{ - mconsole_reply(req, "Sysrq not compiled in", 1, 0); -} -#endif - static DEFINE_SPINLOCK(console_lock); static LIST_HEAD(clients); static char console_buf[MCONSOLE_MAX_DATA]; @@ -549,6 +531,36 @@ static void with_console(struct mc_request *req, void (*proc)(void *), list_del(&entry.list); } +#ifdef CONFIG_MAGIC_SYSRQ +static void sysrq_proc(void *arg) +{ + char *op = arg; + + handle_sysrq(*op, ¤t->thread.regs, NULL); +} + +void mconsole_sysrq(struct mc_request *req) +{ + char *ptr = req->request.data; + + ptr += strlen("sysrq"); + while(isspace(*ptr)) ptr++; + + /* With 'b', the system will shut down without a chance to reply, + * so in this case, we reply first. + */ + if(*ptr == 'b') + mconsole_reply(req, "", 0, 0); + + with_console(req, sysrq_proc, ptr); +} +#else +void mconsole_sysrq(struct mc_request *req) +{ + mconsole_reply(req, "Sysrq not compiled in", 1, 0); +} +#endif + static void stack_proc(void *arg) { struct task_struct *from = current, *to = arg; |