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| author | Peter Zijlstra <peterz@infradead.org> | 2020-08-20 10:13:30 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-08-26 13:41:53 +0300 |
| commit | fddf9055a60dfcc97bda5ef03c8fa4108ed555c5 (patch) | |
| tree | 5909759ef3729f2ef425cee2b1b33e483a48954c /drivers | |
| parent | d012a7190fc1fd72ed48911e77ca97ba4521bccd (diff) | |
| download | linux-fddf9055a60dfcc97bda5ef03c8fa4108ed555c5.tar.xz | |
lockdep: Use raw_cpu_*() for per-cpu variables
Sven reported that commit a21ee6055c30 ("lockdep: Change
hardirq{s_enabled,_context} to per-cpu variables") caused trouble on
s390 because their this_cpu_*() primitives disable preemption which
then lands back tracing.
On the one hand, per-cpu ops should use preempt_*able_notrace() and
raw_local_irq_*(), on the other hand, we can trivialy use raw_cpu_*()
ops for this.
Fixes: a21ee6055c30 ("lockdep: Change hardirq{s_enabled,_context} to per-cpu variables")
Reported-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Marco Elver <elver@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200821085348.192346882@infradead.org
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions