[PATCH] uml: revert "run mconsole "sysrq" in process context"

Revert commit 12ebcd73e40e09f0dfddf89e465cc0541e0ff8b1, i.e. [PATCH] uml: run
mconsole "sysrq" in process context on request from Jeff Dike.

a) sysrq may be run when the scheduler is non-functioning

b) the warning I wanted to fix actually came from the fault handler run in
atomic context. But I fixed that not to take the semaphore in a separate
patch.

c) the fault handler is run because of a fault, and that fault was
unaffected by this patch.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

arch/um/drivers/mconsole_user.c

···
 	{ "reboot", mconsole_reboot, MCONSOLE_PROC },
 	{ "config", mconsole_config, MCONSOLE_PROC },
 	{ "remove", mconsole_remove, MCONSOLE_PROC },
-	{ "sysrq", mconsole_sysrq, MCONSOLE_PROC },
+	{ "sysrq", mconsole_sysrq, MCONSOLE_INTR },
 	{ "help", mconsole_help, MCONSOLE_INTR },
 	{ "cad", mconsole_cad, MCONSOLE_INTR },
 	{ "stop", mconsole_stop, MCONSOLE_PROC },