tag 41629ab21f01d5359b2810738f7d44c866cb0728
tagger Thomas Gleixner <tglx@linutronix.de> Sun Nov 01 14:46:45 2020 +0100
object 1a39340865ce505a029b37aeb47a3e4c8db5f6c6

A couple of locking fixes:

 - Fix incorrect failure injection handling on the fuxtex code

 - Prevent a preemption warning in lockdep when tracking local_irq_enable()
   and interrupts are already enabled

 - Remove more raw_cpu_read() usage from lockdep which causes state
   corruption on !X86 architectures.

 - Make the nr_unused_locks accounting in lockdep correct again.

commit 1a39340865ce505a029b37aeb47a3e4c8db5f6c6
author Peter Zijlstra <peterz@infradead.org> Tue Oct 27 13:48:34 2020 +0100
committer Peter Zijlstra <peterz@infradead.org> Fri Oct 30 17:07:18 2020 +0100
tree 54c08eab491b2b6ded61b910db833389ff6a4679
parent d48e3850030623e1c20785bceaaf78f916d0b1a3

lockdep: Fix nr_unused_locks accounting

Chris reported that commit 24d5a3bffef1 ("lockdep: Fix
usage_traceoverflow") breaks the nr_unused_locks validation code
triggered by /proc/lockdep_stats.

By fully splitting LOCK_USED and LOCK_USED_READ it becomes a bad
indicator for accounting nr_unused_locks; simplyfy by using any first
bit.

Fixes: 24d5a3bffef1 ("lockdep: Fix usage_traceoverflow")
Reported-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://lkml.kernel.org/r/20201027124834.GL2628@hirez.programming.kicks-ass.net