diff options
author | Steven Whitehouse <swhiteho@redhat.com> | 2009-01-16 16:21:12 +0000 |
---|---|---|
committer | David Teigland <teigland@redhat.com> | 2009-01-28 12:55:55 -0600 |
commit | 305a47b17c6efcc0e7b67b0bd41e2c12b7af758b (patch) | |
tree | 610c0b2642815221d57f39371d854d4751596dd5 /fs/dlm | |
parent | 152a649b647a8ef47bb74ff9e11850fa6001bedc (diff) | |
download | kernel_samsung_espresso10-305a47b17c6efcc0e7b67b0bd41e2c12b7af758b.zip kernel_samsung_espresso10-305a47b17c6efcc0e7b67b0bd41e2c12b7af758b.tar.gz kernel_samsung_espresso10-305a47b17c6efcc0e7b67b0bd41e2c12b7af758b.tar.bz2 |
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')
-rw-r--r-- | fs/dlm/dir.c | 18 | ||||
-rw-r--r-- | fs/dlm/dlm_internal.h | 2 | ||||
-rw-r--r-- | fs/dlm/lockspace.c | 2 |
3 files changed, 11 insertions, 11 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; } diff --git a/fs/dlm/dlm_internal.h b/fs/dlm/dlm_internal.h index 076e86f..d01ca0a 100644 --- a/fs/dlm/dlm_internal.h +++ b/fs/dlm/dlm_internal.h @@ -99,7 +99,7 @@ struct dlm_direntry { struct dlm_dirtable { struct list_head list; - rwlock_t lock; + spinlock_t lock; }; struct dlm_rsbtable { diff --git a/fs/dlm/lockspace.c b/fs/dlm/lockspace.c index aa32e5f..cd8e2df 100644 --- a/fs/dlm/lockspace.c +++ b/fs/dlm/lockspace.c @@ -487,7 +487,7 @@ static int new_lockspace(char *name, int namelen, void **lockspace, goto out_lkbfree; for (i = 0; i < size; i++) { INIT_LIST_HEAD(&ls->ls_dirtbl[i].list); - rwlock_init(&ls->ls_dirtbl[i].lock); + spin_lock_init(&ls->ls_dirtbl[i].lock); } INIT_LIST_HEAD(&ls->ls_waiters); |