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From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
To: "Rafael J. Wysocki" <rjw@rjwysocki.net>,
	Kevin Hilman <khilman@kernel.org>,
	Ulf Hansson <ulf.hansson@linaro.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>,
	linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 0/2] PM: domains: use separate lockdep class for each genpd
Date: Fri, 11 Jun 2021 13:15:38 +0300	[thread overview]
Message-ID: <20210611101540.3379937-1-dmitry.baryshkov@linaro.org> (raw)

It is not possible to always use mutex nesting when locking/unlocking
genpds. See for example the trace in the patch#2, where genpd calls are
broken with regulator calls (genpd enables regulator, regulator uses
another genpd). This causes lockdep to print a false warning and stop
reporting further warnings. Break this by introducing per-domain lock
classes and use them to clearly track genpd locking sequences.



             reply	other threads:[~2021-06-11 10:17 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-11 10:15 Dmitry Baryshkov [this message]
2021-06-11 10:15 ` [PATCH 1/2] PM: domains: call mutex_destroy when removing the genpd Dmitry Baryshkov
2021-06-15 13:51   ` Greg Kroah-Hartman
2021-06-11 10:15 ` [PATCH 2/2] PM: domain: use per-genpd lockdep class Dmitry Baryshkov
2021-06-11 13:49   ` Ulf Hansson
2021-06-11 14:34     ` Dmitry Baryshkov
2021-06-15 10:17       ` Ulf Hansson
2021-06-15 11:10         ` Mark Brown
2021-06-15 14:55           ` Ulf Hansson
2021-06-15 15:26             ` Mark Brown
2021-06-15 15:35               ` Ulf Hansson
2021-06-15 15:38                 ` Mark Brown
2021-06-15 15:55         ` Bjorn Andersson
2021-06-17  9:07           ` Ulf Hansson
2021-06-17 16:19             ` Dmitry Baryshkov
2021-06-17 17:27               ` Bjorn Andersson
2021-06-17 17:17             ` Bjorn Andersson
2021-06-28 19:55             ` Dmitry Baryshkov
2021-06-29 11:05               ` Ulf Hansson
2021-06-29 15:09               ` Bjorn Andersson
2021-07-01 10:06                 ` Ulf Hansson
2021-07-01 11:01                   ` Dmitry Baryshkov
2021-07-01 15:14                     ` Ulf Hansson
2021-06-20  0:39   ` kernel test robot
2021-06-20  0:39     ` kernel test robot

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