* [PATCH v2] dax: Add missing annotations for dax_read_lock() and dax_read_unlock()
@ 2020-02-24 1:50 Jules Irenge
0 siblings, 0 replies; only message in thread
From: Jules Irenge @ 2020-02-24 1:50 UTC (permalink / raw)
To: boqun.feng
Cc: vishal.l.verma, linux-nvdimm, linux-kernel, yi.zhang, Jules Irenge
Sparse reports warnings at dax_read_lock() and dax_read_unlock()
warning: context imbalance in dax_read_lock() - wrong count at exit
warning: context imbalance in dax_read_unlock() - unexpected unlock
The root cause is the missing annotations at dax_read_lock()
and dax_read_unlock()
Add the missing __acquires(&dax_srcu) annotation to dax_read_lock()
Add the missing __releases(&dax_srcu) annotation to dax_read_unlock()
Signed-off-by: Jules Irenge <jbi.octave@gmail.com>
---
Changes since V1
Correct commit log typing mistakes
drivers/dax/super.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index 26a654dbc69a..f872a2fb98d4 100644
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -28,13 +28,13 @@ static struct super_block *dax_superblock __read_mostly;
static struct hlist_head dax_host_list[DAX_HASH_SIZE];
static DEFINE_SPINLOCK(dax_host_lock);
-int dax_read_lock(void)
+int dax_read_lock(void) __acquires(&dax_srcu)
{
return srcu_read_lock(&dax_srcu);
}
EXPORT_SYMBOL_GPL(dax_read_lock);
-void dax_read_unlock(int id)
+void dax_read_unlock(int id) __releases(&dax_srcu)
{
srcu_read_unlock(&dax_srcu, id);
}
--
2.24.1
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