ceph: get rid of passing callbacks in __dentry_leases_walk()

__dentry_leases_walk() gets a callback and calls it for
a bunch of denties; there are exactly two callers and
we already have a flag telling them apart - lwc->dir_lease.

Seeing that indirect calls are costly these days, let's
get rid of the callback and just call the right function
directly.  Has a side benefit of saner signatures...

[ xiubli: a minor fix in the commit title ]

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Reviewed-by: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 91709934c8b14371a6eb41b35302559d26f94823..7681587437504ec372a362db7fd62861a3a29d54 100644 (file)
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -1593,10 +1593,12 @@ struct ceph_lease_walk_control {
        unsigned long dir_lease_ttl;
 };
 
+static int __dir_lease_check(const struct dentry *, struct ceph_lease_walk_control *);
+static int __dentry_lease_check(const struct dentry *);
+
 static unsigned long
 __dentry_leases_walk(struct ceph_mds_client *mdsc,
-                    struct ceph_lease_walk_control *lwc,
-                    int (*check)(struct dentry*, void*))
+                    struct ceph_lease_walk_control *lwc)
 {
        struct ceph_dentry_info *di, *tmp;
        struct dentry *dentry, *last = NULL;
@@ -1624,7 +1626,10 @@ __dentry_leases_walk(struct ceph_mds_client *mdsc,
                        goto next;
                }
 
-               ret = check(dentry, lwc);
+               if (lwc->dir_lease)
+                       ret = __dir_lease_check(dentry, lwc);
+               else
+                       ret = __dentry_lease_check(dentry);
                if (ret & TOUCH) {
                        /* move it into tail of dir lease list */
                        __dentry_dir_lease_touch(mdsc, di);
@@ -1681,7 +1686,7 @@ next:
        return freed;
 }
 
-static int __dentry_lease_check(struct dentry *dentry, void *arg)
+static int __dentry_lease_check(const struct dentry *dentry)
 {
        struct ceph_dentry_info *di = ceph_dentry(dentry);
        int ret;
@@ -1696,9 +1701,9 @@ static int __dentry_lease_check(struct dentry *dentry, void *arg)
        return DELETE;
 }
 
-static int __dir_lease_check(struct dentry *dentry, void *arg)
+static int __dir_lease_check(const struct dentry *dentry,
+                            struct ceph_lease_walk_control *lwc)
 {
-       struct ceph_lease_walk_control *lwc = arg;
        struct ceph_dentry_info *di = ceph_dentry(dentry);
 
        int ret = __dir_lease_try_check(dentry);
@@ -1737,7 +1742,7 @@ int ceph_trim_dentries(struct ceph_mds_client *mdsc)
 
        lwc.dir_lease = false;
        lwc.nr_to_scan  = CEPH_CAPS_PER_RELEASE * 2;
-       freed = __dentry_leases_walk(mdsc, &lwc, __dentry_lease_check);
+       freed = __dentry_leases_walk(mdsc, &lwc);
        if (!lwc.nr_to_scan) /* more invalid leases */
                return -EAGAIN;
 
@@ -1747,7 +1752,7 @@ int ceph_trim_dentries(struct ceph_mds_client *mdsc)
        lwc.dir_lease = true;
        lwc.expire_dir_lease = freed < count;
        lwc.dir_lease_ttl = mdsc->fsc->mount_options->caps_wanted_delay_max * HZ;
-       freed +=__dentry_leases_walk(mdsc, &lwc, __dir_lease_check);
+       freed +=__dentry_leases_walk(mdsc, &lwc);
        if (!lwc.nr_to_scan) /* more to check */
                return -EAGAIN;