This is a note to let you know that I've just added the patch titled
regmap: Disable locking for RBTREE and MAPLE unit tests
to the 6.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
regmap-disable-locking-for-rbtree-and-maple-unit-tes.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit c2a44187248c0e3c4131846b1e79fa02f3905eb3
Author: Guenter Roeck <linux@xxxxxxxxxxxx>
Date: Wed Jul 19 20:28:47 2023 -0700
regmap: Disable locking for RBTREE and MAPLE unit tests
[ Upstream commit a9e26169cfda651802f88262a315146fbe4bc74c ]
REGCACHE_RBTREE and REGCACHE_MAPLE dynamically allocate memory
for regmap operations. This is incompatible with spinlock based locking
which is used for fast_io operations. Disable locking for the associated
unit tests to avoid lockdep splashes.
Fixes: f033c26de5a5 ("regmap: Add maple tree based register cache")
Fixes: 2238959b6ad2 ("regmap: Add some basic kunit tests")
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230720032848.1306349-1-linux@xxxxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/base/regmap/regmap-kunit.c b/drivers/base/regmap/regmap-kunit.c
index f76d416881349..0b3dacc7fa424 100644
--- a/drivers/base/regmap/regmap-kunit.c
+++ b/drivers/base/regmap/regmap-kunit.c
@@ -58,6 +58,9 @@ static struct regmap *gen_regmap(struct regmap_config *config,
int i;
struct reg_default *defaults;
+ config->disable_locking = config->cache_type == REGCACHE_RBTREE ||
+ config->cache_type == REGCACHE_MAPLE;
+
buf = kmalloc(size, GFP_KERNEL);
if (!buf)
return ERR_PTR(-ENOMEM);
