+ mips-kdb-remove-old-workaround-for-backtracing-on-other-cpus.patch added to -mm tree

+ mips-kdb-remove-old-workaround-for-backtracing-on-other-cpus.patch added to -mm tree

[akpm]

The patch titled
     Subject: MIPS: kdb: remove old workaround for backtracing on other CPUs
has been added to the -mm tree.  Its filename is
     mips-kdb-remove-old-workaround-for-backtracing-on-other-cpus.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/mips-kdb-remove-old-workaround-for-backtracing-on-other-cpus.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/mips-kdb-remove-old-workaround-for-backtracing-on-other-cpus.patch

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------------------------------------------------------
From: Douglas Anderson <dianders@chromium.org>
Subject: MIPS: kdb: remove old workaround for backtracing on other CPUs

Patch series "kdb: Don't implicitly change tasks; plus misc fixups".


This patch (of 5):

As of commit 2277b492582d ("kdb: Fix stack crawling on 'running' CPUs that
aren't the master") we no longer need any special case for doing stack
dumps on CPUs that are not the kdb master.  Let's remove.

Link: http://lkml.kernel.org/r/20191109111623.1.I30a0cac4d9880040c8d41495bd9a567fe3e24989@changeid
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Cc: Chong Qiao <qiaochong@loongson.cn>
Cc: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: James Hogan <jhogan@kernel.org>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Philippe Mathieu-Daud <f4bug@amsat.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Serge Semin <fancer.lancer@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/mips/kernel/traps.c |    5 -----
 1 file changed, 5 deletions(-)

--- a/arch/mips/kernel/traps.c~mips-kdb-remove-old-workaround-for-backtracing-on-other-cpus
+++ a/arch/mips/kernel/traps.c
@@ -210,11 +210,6 @@ void show_stack(struct task_struct *task
 			regs.regs[29] = task->thread.reg29;
 			regs.regs[31] = 0;
 			regs.cp0_epc = task->thread.reg31;
-#ifdef CONFIG_KGDB_KDB
-		} else if (atomic_read(&kgdb_active) != -1 &&
-			   kdb_current_regs) {
-			memcpy(&regs, kdb_current_regs, sizeof(regs));
-#endif /* CONFIG_KGDB_KDB */
 		} else {
 			prepare_frametrace(&regs);
 		}
_

Patches currently in -mm which might be from dianders@chromium.org are

mips-kdb-remove-old-workaround-for-backtracing-on-other-cpus.patch
kdb-kdb_current_regs-should-be-private.patch
kdb-kdb_current_task-shouldnt-be-exported.patch
kdb-gid-rid-of-implicit-setting-of-the-current-task-regs.patch
kdb-get-rid-of-confusing-diag-msg-from-rd-if-current-task-has-no-regs.patch