Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-24 05:02:12 +00:00
Code Issues Packages Projects Releases Wiki Activity

[PATCH] uml: capture printk output for mconsole sysrq

Browse Source 
Pass sysrq output back to the mconsole client using the mechanism
introduced for stack output.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jeff Dike 2006-01-06 00:19:05 -08:00 committed by Linus Torvalds
parent 6f517d3fc8
commit 4111b025dc
1 changed files with 30 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

48
arch/um/drivers/mconsole_kern.c
View File

@ -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, &current->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, &current->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;