From a161de8608909e8d07fb162bf3dabdbf9190c69d Mon Sep 17 00:00:00 2001 From: frank zago Date: Wed, 23 Dec 2015 12:32:11 -0500 Subject: [PATCH] staging: lustre: add sparse locking annotations Adds __acquires / __releases / __must_hold sparse locking annotations to several functions. Fixes sparse warnings such as: libcfs/libcfs/hash.c:127:1: warning: context imbalance in 'cfs_hash_spin_lock' - wrong count at exit libcfs/libcfs/hash.c:133:1: warning: context imbalance in 'cfs_hash_spin_unlock' - unexpected unlock libcfs/libcfs/hash.c:141:9: warning: context imbalance in 'cfs_hash_rw_lock' - wrong count at exit include/linux/rwlock_api_smp.h:221:9: warning: context imbalance in 'cfs_hash_rw_unlock' - unexpected unlock Signed-off-by: frank zago Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-5396 Reviewed-on: http://review.whamcloud.com/11295 Reviewed-by: John L. Hammond Reviewed-by: Patrick Farrell Reviewed-by: Oleg Drokin Signed-off-by: Greg Kroah-Hartman --- drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c | 3 +-- drivers/staging/lustre/lnet/klnds/socklnd/socklnd_cb.c | 1 + drivers/staging/lustre/lustre/libcfs/libcfs_lock.c | 2 ++ drivers/staging/lustre/lustre/osc/osc_cache.c | 3 +++ drivers/staging/lustre/lustre/ptlrpc/client.c | 1 + 5 files changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c b/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c index c7b9ccb13f1c..176c79b95692 100644 --- a/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c +++ b/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c @@ -750,8 +750,7 @@ kiblnd_setup_rd_kiov(lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd, static int kiblnd_post_tx_locked(kib_conn_t *conn, kib_tx_t *tx, int credit) - __releases(conn->ibc_lock) - __acquires(conn->ibc_lock) + __must_hold(&conn->ibc_lock) { kib_msg_t *msg = tx->tx_msg; kib_peer_t *peer = conn->ibc_peer; diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_cb.c b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_cb.c index 477b385f15e0..a0955d21fec2 100644 --- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_cb.c +++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_cb.c @@ -2336,6 +2336,7 @@ ksocknal_flush_stale_txs(ksock_peer_t *peer) static int ksocknal_send_keepalive_locked(ksock_peer_t *peer) + __must_hold(&ksocknal_data.ksnd_global_lock) { ksock_sched_t *sched; ksock_conn_t *conn; diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c b/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c index 15782d9e6aa9..32db78803d46 100644 --- a/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c +++ b/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c @@ -90,6 +90,7 @@ EXPORT_SYMBOL(cfs_percpt_lock_alloc); */ void cfs_percpt_lock(struct cfs_percpt_lock *pcl, int index) + __acquires(pcl->pcl_locks) { int ncpt = cfs_cpt_number(pcl->pcl_cptab); int i; @@ -124,6 +125,7 @@ EXPORT_SYMBOL(cfs_percpt_lock); /** unlock a CPU partition */ void cfs_percpt_unlock(struct cfs_percpt_lock *pcl, int index) + __releases(pcl->pcl_locks) { int ncpt = cfs_cpt_number(pcl->pcl_cptab); int i; diff --git a/drivers/staging/lustre/lustre/osc/osc_cache.c b/drivers/staging/lustre/lustre/osc/osc_cache.c index 2229419b7184..6b5f8d0d53df 100644 --- a/drivers/staging/lustre/lustre/osc/osc_cache.c +++ b/drivers/staging/lustre/lustre/osc/osc_cache.c @@ -1938,6 +1938,7 @@ static int get_write_extents(struct osc_object *obj, struct list_head *rpclist) static int osc_send_write_rpc(const struct lu_env *env, struct client_obd *cli, struct osc_object *osc) + __must_hold(osc) { LIST_HEAD(rpclist); struct osc_extent *ext; @@ -2010,6 +2011,7 @@ osc_send_write_rpc(const struct lu_env *env, struct client_obd *cli, static int osc_send_read_rpc(const struct lu_env *env, struct client_obd *cli, struct osc_object *osc) + __must_hold(osc) { struct osc_extent *ext; struct osc_extent *next; @@ -2083,6 +2085,7 @@ static struct osc_object *osc_next_obj(struct client_obd *cli) /* called with the loi list lock held */ static void osc_check_rpcs(const struct lu_env *env, struct client_obd *cli) + __must_hold(&cli->cl_loi_list_lock) { struct osc_object *osc; int rc = 0; diff --git a/drivers/staging/lustre/lustre/ptlrpc/client.c b/drivers/staging/lustre/lustre/ptlrpc/client.c index efdda09507bf..8f3c26f1398f 100644 --- a/drivers/staging/lustre/lustre/ptlrpc/client.c +++ b/drivers/staging/lustre/lustre/ptlrpc/client.c @@ -353,6 +353,7 @@ static int unpack_reply(struct ptlrpc_request *req) * If anything goes wrong just ignore it - same as if it never happened */ static int ptlrpc_at_recv_early_reply(struct ptlrpc_request *req) + __must_hold(&req->rq_lock) { struct ptlrpc_request *early_req; time64_t olddl; -- 2.39.5