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authorSteven Whitehouse <swhiteho@redhat.com>2009-01-16 16:21:12 +0000
committerDavid Teigland <teigland@redhat.com>2009-01-28 12:55:55 -0600
commit305a47b17c6efcc0e7b67b0bd41e2c12b7af758b (patch)
tree610c0b2642815221d57f39371d854d4751596dd5 /fs/dlm/dir.c
parent152a649b647a8ef47bb74ff9e11850fa6001bedc (diff)
downloadop-kernel-dev-305a47b17c6efcc0e7b67b0bd41e2c12b7af758b.zip
op-kernel-dev-305a47b17c6efcc0e7b67b0bd41e2c12b7af758b.tar.gz
dlm: Change rwlock which is only used in write mode to a spinlock
The ls_dirtbl[].lock was an rwlock, but since it was only used in write mode a spinlock will suffice. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> Signed-off-by: David Teigland <teigland@redhat.com>
Diffstat (limited to 'fs/dlm/dir.c')
-rw-r--r--fs/dlm/dir.c18
1 files changed, 9 insertions, 9 deletions
diff --git a/fs/dlm/dir.c b/fs/dlm/dir.c
index 92969f8..858fba1 100644
--- a/fs/dlm/dir.c
+++ b/fs/dlm/dir.c
@@ -156,7 +156,7 @@ void dlm_dir_remove_entry(struct dlm_ls *ls, int nodeid, char *name, int namelen
bucket = dir_hash(ls, name, namelen);
- write_lock(&ls->ls_dirtbl[bucket].lock);
+ spin_lock(&ls->ls_dirtbl[bucket].lock);
de = search_bucket(ls, name, namelen, bucket);
@@ -173,7 +173,7 @@ void dlm_dir_remove_entry(struct dlm_ls *ls, int nodeid, char *name, int namelen
list_del(&de->list);
kfree(de);
out:
- write_unlock(&ls->ls_dirtbl[bucket].lock);
+ spin_unlock(&ls->ls_dirtbl[bucket].lock);
}
void dlm_dir_clear(struct dlm_ls *ls)
@@ -185,14 +185,14 @@ void dlm_dir_clear(struct dlm_ls *ls)
DLM_ASSERT(list_empty(&ls->ls_recover_list), );
for (i = 0; i < ls->ls_dirtbl_size; i++) {
- write_lock(&ls->ls_dirtbl[i].lock);
+ spin_lock(&ls->ls_dirtbl[i].lock);
head = &ls->ls_dirtbl[i].list;
while (!list_empty(head)) {
de = list_entry(head->next, struct dlm_direntry, list);
list_del(&de->list);
put_free_de(ls, de);
}
- write_unlock(&ls->ls_dirtbl[i].lock);
+ spin_unlock(&ls->ls_dirtbl[i].lock);
}
}
@@ -307,17 +307,17 @@ static int get_entry(struct dlm_ls *ls, int nodeid, char *name,
bucket = dir_hash(ls, name, namelen);
- write_lock(&ls->ls_dirtbl[bucket].lock);
+ spin_lock(&ls->ls_dirtbl[bucket].lock);
de = search_bucket(ls, name, namelen, bucket);
if (de) {
*r_nodeid = de->master_nodeid;
- write_unlock(&ls->ls_dirtbl[bucket].lock);
+ spin_unlock(&ls->ls_dirtbl[bucket].lock);
if (*r_nodeid == nodeid)
return -EEXIST;
return 0;
}
- write_unlock(&ls->ls_dirtbl[bucket].lock);
+ spin_unlock(&ls->ls_dirtbl[bucket].lock);
if (namelen > DLM_RESNAME_MAXLEN)
return -EINVAL;
@@ -330,7 +330,7 @@ static int get_entry(struct dlm_ls *ls, int nodeid, char *name,
de->length = namelen;
memcpy(de->name, name, namelen);
- write_lock(&ls->ls_dirtbl[bucket].lock);
+ spin_lock(&ls->ls_dirtbl[bucket].lock);
tmp = search_bucket(ls, name, namelen, bucket);
if (tmp) {
kfree(de);
@@ -339,7 +339,7 @@ static int get_entry(struct dlm_ls *ls, int nodeid, char *name,
list_add_tail(&de->list, &ls->ls_dirtbl[bucket].list);
}
*r_nodeid = de->master_nodeid;
- write_unlock(&ls->ls_dirtbl[bucket].lock);
+ spin_unlock(&ls->ls_dirtbl[bucket].lock);
return 0;
}
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