documentation: update sysrq.txt magic sysrq keys
Update Documentation/sysrq.txt magic sysrq keys:
- 'g' is for kgdb (not arch-specific);
- add 2 new uses for 'v', remove the Voyager info;
- add 'y' info (SPARC-64 specific);
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: "James E.J. Bottomley" <James.Bottomley@suse.de>
Cc: David Airlie <airlied@linux.ie>
Acked-by: Alexander Shishkin <virtuoso@slind.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/Documentation/sysrq.txt b/Documentation/sysrq.txt
index 5c17196..312e375 100644
--- a/Documentation/sysrq.txt
+++ b/Documentation/sysrq.txt
@@ -75,7 +75,7 @@
'f' - Will call oom_kill to kill a memory hog process.
-'g' - Used by kgdb on ppc and sh platforms.
+'g' - Used by kgdb (kernel debugger)
'h' - Will display help (actually any other key than those listed
here will display help. but 'h' is easy to remember :-)
@@ -110,12 +110,15 @@
'u' - Will attempt to remount all mounted filesystems read-only.
-'v' - Dumps Voyager SMP processor info to your console.
+'v' - Forcefully restores framebuffer console
+'v' - Causes ETM buffer dump [ARM-specific]
'w' - Dumps tasks that are in uninterruptable (blocked) state.
'x' - Used by xmon interface on ppc/powerpc platforms.
+'y' - Show global CPU Registers [SPARC-64 specific]
+
'z' - Dump the ftrace buffer
'0'-'9' - Sets the console log level, controlling which kernel messages