linux-kernel - [GIT pull] core/urgent for 5.10-rc3

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Message-ID: <160484899473.4262.9790266201913163807.tglx@nanos>
Date:   Sun, 08 Nov 2020 15:23:14 -0000
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, x86@...nel.org
Subject: [GIT pull] core/urgent for 5.10-rc3

Linus,

please pull the latest core/urgent branch from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git core-urgent-2020-11-08

up to:  9d820f68b2bd: entry: Fix the incorrect ordering of lockdep and RCU check

A single fix for the generic entry code to correct the wrong assumption
that the lockdep interrupt state needs not to be established before calling
the RCU check.

Thanks,

	tglx

------------------>
Thomas Gleixner (1):
      entry: Fix the incorrect ordering of lockdep and RCU check


 kernel/entry/common.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/entry/common.c b/kernel/entry/common.c
index 2b8366693d5c..e9e2df3f3f9e 100644
--- a/kernel/entry/common.c
+++ b/kernel/entry/common.c
@@ -337,10 +337,10 @@ noinstr irqentry_state_t irqentry_enter(struct pt_regs *regs)
 	 * already contains a warning when RCU is not watching, so no point
 	 * in having another one here.
 	 */
+	lockdep_hardirqs_off(CALLER_ADDR0);
 	instrumentation_begin();
 	rcu_irq_enter_check_tick();
-	/* Use the combo lockdep/tracing function */
-	trace_hardirqs_off();
+	trace_hardirqs_off_finish();
 	instrumentation_end();
 
 	return ret;