diff mbox series

[v2,1/4] dax/bus.c: replace WARN_ON_ONCE() with lockdep asserts

Message ID 20240416-vv-dax_abi_fixes-v2-1-d5f0c8ec162e@intel.com (mailing list archive)
State New
Headers show
Series dax/bus.c: Fixups for dax-bus locking | expand

Commit Message

Verma, Vishal L April 16, 2024, 9:46 p.m. UTC 
In [1], Dan points out that all of the WARN_ON_ONCE() usage in the
referenced patch should be replaced with lockdep_assert_held, or
lockdep_held_assert_write(). Replace these as appropriate.

Link: https://lore.kernel.org/r/65f0b5ef41817_aa222941a@dwillia2-mobl3.amr.corp.intel.com.notmuch [1]
Fixes: c05ae9d85b47 ("dax/bus.c: replace driver-core lock usage by a local rwsem")
Cc: Andrew Morton <akpm@linux-foundation.org>
Reported-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
---
 drivers/dax/bus.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

Comments

Dan Williams April 30, 2024, 1:23 a.m. UTC | #1 
Vishal Verma wrote:
> In [1], Dan points out that all of the WARN_ON_ONCE() usage in the
> referenced patch should be replaced with lockdep_assert_held, or
> lockdep_held_assert_write(). Replace these as appropriate.
> 
> Link: https://lore.kernel.org/r/65f0b5ef41817_aa222941a@dwillia2-mobl3.amr.corp.intel.com.notmuch [1]
> Fixes: c05ae9d85b47 ("dax/bus.c: replace driver-core lock usage by a local rwsem")
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Reported-by: Dan Williams <dan.j.williams@intel.com>
> Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
> ---
>  drivers/dax/bus.c | 16 ++++++++--------
>  1 file changed, 8 insertions(+), 8 deletions(-)

Looks good,

Reviewed-by: Dan Williams <dan.j.williams@intel.com>
diff mbox series

Patch

diff --git a/drivers/dax/bus.c b/drivers/dax/bus.c
index 797e1ebff299..7924dd542a13 100644
--- a/drivers/dax/bus.c
+++ b/drivers/dax/bus.c
@@ -192,7 +192,7 @@  static u64 dev_dax_size(struct dev_dax *dev_dax)
 	u64 size = 0;
 	int i;
 
-	WARN_ON_ONCE(!rwsem_is_locked(&dax_dev_rwsem));
+	lockdep_assert_held(&dax_dev_rwsem);
 
 	for (i = 0; i < dev_dax->nr_range; i++)
 		size += range_len(&dev_dax->ranges[i].range);
@@ -302,7 +302,7 @@  static unsigned long long dax_region_avail_size(struct dax_region *dax_region)
 	resource_size_t size = resource_size(&dax_region->res);
 	struct resource *res;
 
-	WARN_ON_ONCE(!rwsem_is_locked(&dax_region_rwsem));
+	lockdep_assert_held(&dax_region_rwsem);
 
 	for_each_dax_region_resource(dax_region, res)
 		size -= resource_size(res);
@@ -447,7 +447,7 @@  static void trim_dev_dax_range(struct dev_dax *dev_dax)
 	struct range *range = &dev_dax->ranges[i].range;
 	struct dax_region *dax_region = dev_dax->region;
 
-	WARN_ON_ONCE(!rwsem_is_locked(&dax_region_rwsem));
+	lockdep_assert_held_write(&dax_region_rwsem);
 	dev_dbg(&dev_dax->dev, "delete range[%d]: %#llx:%#llx\n", i,
 		(unsigned long long)range->start,
 		(unsigned long long)range->end);
@@ -507,7 +507,7 @@  static int __free_dev_dax_id(struct dev_dax *dev_dax)
 	struct dax_region *dax_region;
 	int rc = dev_dax->id;
 
-	WARN_ON_ONCE(!rwsem_is_locked(&dax_dev_rwsem));
+	lockdep_assert_held_write(&dax_dev_rwsem);
 
 	if (!dev_dax->dyn_id || dev_dax->id < 0)
 		return -1;
@@ -713,7 +713,7 @@  static void __unregister_dax_mapping(void *data)
 
 	dev_dbg(dev, "%s\n", __func__);
 
-	WARN_ON_ONCE(!rwsem_is_locked(&dax_region_rwsem));
+	lockdep_assert_held_write(&dax_region_rwsem);
 
 	dev_dax->ranges[mapping->range_id].mapping = NULL;
 	mapping->range_id = -1;
@@ -830,7 +830,7 @@  static int devm_register_dax_mapping(struct dev_dax *dev_dax, int range_id)
 	struct device *dev;
 	int rc;
 
-	WARN_ON_ONCE(!rwsem_is_locked(&dax_region_rwsem));
+	lockdep_assert_held_write(&dax_region_rwsem);
 
 	if (dev_WARN_ONCE(&dev_dax->dev, !dax_region->dev->driver,
 				"region disabled\n"))
@@ -876,7 +876,7 @@  static int alloc_dev_dax_range(struct dev_dax *dev_dax, u64 start,
 	struct resource *alloc;
 	int i, rc;
 
-	WARN_ON_ONCE(!rwsem_is_locked(&dax_region_rwsem));
+	lockdep_assert_held_write(&dax_region_rwsem);
 
 	/* handle the seed alloc special case */
 	if (!size) {
@@ -935,7 +935,7 @@  static int adjust_dev_dax_range(struct dev_dax *dev_dax, struct resource *res, r
 	struct device *dev = &dev_dax->dev;
 	int rc;
 
-	WARN_ON_ONCE(!rwsem_is_locked(&dax_region_rwsem));
+	lockdep_assert_held_write(&dax_region_rwsem);
 
 	if (dev_WARN_ONCE(dev, !size, "deletion is handled by dev_dax_shrink\n"))
 		return -EINVAL;