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staging: lustre: obdclass: simplify cl_lock_fini() 

Using list_first_entry_or_null() makes this (slightly)
simpler.

Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
NeilBrown 2017-10-30 15:59:27 +11:00 committed by Greg Kroah-Hartman
parent dff162689a
commit 988b9ea912
1 changed files with 4 additions and 5 deletions
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9
drivers/staging/lustre/lustre/obdclass/cl_lock.c
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@ -79,13 +79,12 @@ EXPORT_SYMBOL(cl_lock_slice_add);
void cl_lock_fini(const struct lu_env *env, struct cl_lock *lock)
{
struct cl_lock_slice *slice;
cl_lock_trace(D_DLMTRACE, env, "destroy lock", lock);
while (!list_empty(&lock->cll_layers)) {
struct cl_lock_slice *slice;
slice = list_entry(lock->cll_layers.next,
struct cl_lock_slice, cls_linkage);
while ((slice = list_first_entry_or_null(&lock->cll_layers,
struct cl_lock_slice,
cls_linkage)) != NULL) {
list_del_init(lock->cll_layers.next);
slice->cls_ops->clo_fini(env, slice);
}