[lkml]   [2020]   [Aug]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Subject[PATCH v2 0/7] regulator: fix deadlock vs memory reclaim
For systems that have eg. eMMC storage using voltage regulator, memory
reclaim path might call back into regulator subsystem. This means we
have to make sure no allocations happen with a regulator or regulator
list locked.

After this series I see no more lockdep complaints on my test system,
but please review and test further.

First four patches move allocations out of locked regions, next three
came as a drive-by cleanups.

v2: fix bug in patch #4 spotted by kernel test robot
reworded commit #7 description

Michał Mirosław (7):
regulator: push allocation in regulator_init_coupling() outside of
regulator: push allocation in regulator_ena_gpio_request() out of lock
regulator: push allocations in create_regulator() outside of lock
regulator: push allocation in set_consumer_device_supply() out of lock
regulator: plug of_node leak in regulator_register()'s error path
regulator: cleanup regulator_ena_gpio_free()
regulator: remove superfluous lock in regulator_resolve_coupling()

drivers/regulator/core.c | 164 +++++++++++++++++++++------------------
1 file changed, 87 insertions(+), 77 deletions(-)


 \ /
  Last update: 2020-08-12 03:31    [W:0.073 / U:2.088 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site