Messages in this thread Patch in this message |  | | From | NeilBrown <> | Date | Mon, 18 Dec 2017 18:18:00 +1100 | Subject | [PATCH 06/16] staging: lustre: simplify l_wait_event when intr handler but no timeout. |
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If l_wait_event() is given a function to be called on a signal, but no timeout or timeout handler, then the intr function is simply called at the end if the wait was aborted by a signal. So a simpler way to write the code (in the one place this case is used) it to open-code the body of the function after the wait_event, if -ERESTARTSYS was returned.
Signed-off-by: NeilBrown <neilb@suse.com> --- drivers/staging/lustre/lustre/ldlm/ldlm_flock.c | 30 +++++------------------ 1 file changed, 7 insertions(+), 23 deletions(-)
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_flock.c b/drivers/staging/lustre/lustre/ldlm/ldlm_flock.c index 657ab95091a0..411b540b96d9 100644 --- a/drivers/staging/lustre/lustre/ldlm/ldlm_flock.c +++ b/drivers/staging/lustre/lustre/ldlm/ldlm_flock.c @@ -310,24 +310,6 @@ static int ldlm_process_flock_lock(struct ldlm_lock *req) return LDLM_ITER_CONTINUE; } -struct ldlm_flock_wait_data { - struct ldlm_lock *fwd_lock; -}; - -static void -ldlm_flock_interrupted_wait(void *data) -{ - struct ldlm_lock *lock; - - lock = ((struct ldlm_flock_wait_data *)data)->fwd_lock; - - lock_res_and_lock(lock); - - /* client side - set flag to prevent lock from being put on LRU list */ - ldlm_set_cbpending(lock); - unlock_res_and_lock(lock); -} - /** * Flock completion callback function. * @@ -342,8 +324,6 @@ int ldlm_flock_completion_ast(struct ldlm_lock *lock, __u64 flags, void *data) { struct file_lock *getlk = lock->l_ast_data; - struct ldlm_flock_wait_data fwd; - struct l_wait_info lwi; int rc = 0; OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_CP_CB_WAIT2, 4); @@ -372,13 +352,17 @@ ldlm_flock_completion_ast(struct ldlm_lock *lock, __u64 flags, void *data) LDLM_DEBUG(lock, "client-side enqueue returned a blocked lock, sleeping"); - fwd.fwd_lock = lock; - lwi = LWI_TIMEOUT_INTR(0, NULL, ldlm_flock_interrupted_wait, &fwd); /* Go to sleep until the lock is granted. */ - rc = l_wait_event(lock->l_waitq, is_granted_or_cancelled(lock), &lwi); + rc = l_wait_event_abortable(lock->l_waitq, is_granted_or_cancelled(lock)); if (rc) { + lock_res_and_lock(lock); + + /* client side - set flag to prevent lock from being put on LRU list */ + ldlm_set_cbpending(lock); + unlock_res_and_lock(lock); + LDLM_DEBUG(lock, "client-side enqueue waking up: failed (%d)", rc); return rc;
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