6:39 a.m.
Applies against next-20150120.
Add __acquires() and __releases() function annotations, to fix sparse warnings related to
lock context imbalance.
This patch fixes the following warnings:
drivers/staging/lustre//lustre/libcfs/linux/linux-tracefile.c:153:5: warning: context
imbalance in 'cfs_trace_lock_tcd' - wrong count at exit
drivers/staging/lustre//lustre/libcfs/linux/linux-tracefile.c:171:39: warning: context
imbalance in 'cfs_trace_unlock_tcd' - unexpected unlock
drivers/staging/lustre//lustre/libcfs/hash.c:128:1: warning: context imbalance in
'cfs_hash_spin_lock' - wrong count at exit
drivers/staging/lustre//lustre/libcfs/hash.c:134:1: warning: context imbalance in
'cfs_hash_spin_unlock' - unexpected unlock
drivers/staging/lustre//lustre/libcfs/hash.c:142:9: warning: context imbalance in
'cfs_hash_rw_lock' - wrong count at exit
include/linux/rwlock_api_smp.h:219:9: warning: context imbalance in
'cfs_hash_rw_unlock' - unexpected unlock
drivers/staging/lustre//lustre/obdclass/cl_object.c:195:6: warning: context imbalance in
'cl_object_attr_lock' - wrong count at exit
drivers/staging/lustre//lustre/obdclass/cl_object.c:204:6: warning: context imbalance in
'cl_object_attr_unlock' - unexpected unlock
Signed-off-by: Loic Pefferkorn <loic(a)loicp.eu>
---
drivers/staging/lustre/lustre/libcfs/hash.c | 4 ++++
drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c | 2 ++
drivers/staging/lustre/lustre/obdclass/cl_object.c | 2 ++
3 files changed, 8 insertions(+)
diff --git a/drivers/staging/lustre/lustre/libcfs/hash.c
b/drivers/staging/lustre/lustre/libcfs/hash.c
index 2d1e672..d89f81a 100644
--- a/drivers/staging/lustre/lustre/libcfs/hash.c
+++ b/drivers/staging/lustre/lustre/libcfs/hash.c
@@ -126,18 +126,21 @@ cfs_hash_nl_unlock(union cfs_hash_lock *lock, int exclusive) {}
static inline void
cfs_hash_spin_lock(union cfs_hash_lock *lock, int exclusive)
+ __acquires(&lock->spin)
{
spin_lock(&lock->spin);
}
static inline void
cfs_hash_spin_unlock(union cfs_hash_lock *lock, int exclusive)
+ __releases(&lock->spin)
{
spin_unlock(&lock->spin);
}
static inline void
cfs_hash_rw_lock(union cfs_hash_lock *lock, int exclusive)
+ __acquires(&lock->rw)
{
if (!exclusive)
read_lock(&lock->rw);
@@ -147,6 +150,7 @@ cfs_hash_rw_lock(union cfs_hash_lock *lock, int exclusive)
static inline void
cfs_hash_rw_unlock(union cfs_hash_lock *lock, int exclusive)
+ __releases(&lock->rw)
{
if (!exclusive)
read_unlock(&lock->rw);
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
index fdc7189..c8e2930 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
@@ -151,6 +151,7 @@ cfs_trace_buf_type_t cfs_trace_buf_idx_get(void)
* for details.
*/
int cfs_trace_lock_tcd(struct cfs_trace_cpu_data *tcd, int walking)
+ __acquires(&tcd->tc_lock)
{
__LASSERT(tcd->tcd_type < CFS_TCD_TYPE_MAX);
if (tcd->tcd_type == CFS_TCD_TYPE_IRQ)
@@ -165,6 +166,7 @@ int cfs_trace_lock_tcd(struct cfs_trace_cpu_data *tcd, int walking)
}
void cfs_trace_unlock_tcd(struct cfs_trace_cpu_data *tcd, int walking)
+ __releases(&tcd->tcd_lock)
{
__LASSERT(tcd->tcd_type < CFS_TCD_TYPE_MAX);
if (tcd->tcd_type == CFS_TCD_TYPE_IRQ)
diff --git a/drivers/staging/lustre/lustre/obdclass/cl_object.c
b/drivers/staging/lustre/lustre/obdclass/cl_object.c
index c40bb6c..f13d1fb 100644
--- a/drivers/staging/lustre/lustre/obdclass/cl_object.c
+++ b/drivers/staging/lustre/lustre/obdclass/cl_object.c
@@ -193,6 +193,7 @@ static spinlock_t *cl_object_attr_guard(struct cl_object *o)
* cl_object_attr_get(), cl_object_attr_set().
*/
void cl_object_attr_lock(struct cl_object *o)
+ __acquires(cl_object_attr_guard(o))
{
spin_lock(cl_object_attr_guard(o));
}
@@ -202,6 +203,7 @@ EXPORT_SYMBOL(cl_object_attr_lock);
* Releases data-attributes lock, acquired by cl_object_attr_lock().
*/
void cl_object_attr_unlock(struct cl_object *o)
+ __releases(cl_object_attr_guard(o))
{
spin_unlock(cl_object_attr_guard(o));
}
--
2.2.1