block: shrink struct bio down to 2 cache lines again

[cascardo/linux.git] / fs / dcache.c

diff --git a/fs/dcache.c b/fs/dcache.c
index 592c4b5..5c8ea15 100644 (file)
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -642,7 +642,7 @@ static inline bool fast_dput(struct dentry *dentry)
 
        /*
         * If we have a d_op->d_delete() operation, we sould not
-        * let the dentry count go to zero, so use "put__or_lock".
+        * let the dentry count go to zero, so use "put_or_lock".
         */
        if (unlikely(dentry->d_flags & DCACHE_OP_DELETE))
                return lockref_put_or_lock(&dentry->d_lockref);
@@ -697,7 +697,7 @@ static inline bool fast_dput(struct dentry *dentry)
         */
        smp_rmb();
        d_flags = ACCESS_ONCE(dentry->d_flags);
-       d_flags &= DCACHE_REFERENCED | DCACHE_LRU_LIST;
+       d_flags &= DCACHE_REFERENCED | DCACHE_LRU_LIST | DCACHE_DISCONNECTED;
 
        /* Nothing to do? Dropping the reference was all we needed? */
        if (d_flags == (DCACHE_REFERENCED | DCACHE_LRU_LIST) && !d_unhashed(dentry))
@@ -776,6 +776,9 @@ repeat:
        if (unlikely(d_unhashed(dentry)))
                goto kill_it;
 
+       if (unlikely(dentry->d_flags & DCACHE_DISCONNECTED))
+               goto kill_it;
+
        if (unlikely(dentry->d_flags & DCACHE_OP_DELETE)) {
                if (dentry->d_op->d_delete(dentry))
                        goto kill_it;
@@ -1673,7 +1676,8 @@ void d_set_d_op(struct dentry *dentry, const struct dentry_operations *op)
                                DCACHE_OP_COMPARE       |
                                DCACHE_OP_REVALIDATE    |
                                DCACHE_OP_WEAK_REVALIDATE       |
-                               DCACHE_OP_DELETE ));
+                               DCACHE_OP_DELETE        |
+                               DCACHE_OP_SELECT_INODE));
        dentry->d_op = op;
        if (!op)
                return;
@@ -1689,6 +1693,8 @@ void d_set_d_op(struct dentry *dentry, const struct dentry_operations *op)
                dentry->d_flags |= DCACHE_OP_DELETE;
        if (op->d_prune)
                dentry->d_flags |= DCACHE_OP_PRUNE;
+       if (op->d_select_inode)
+               dentry->d_flags |= DCACHE_OP_SELECT_INODE;
 
 }
 EXPORT_SYMBOL(d_set_d_op);
@@ -2927,17 +2933,6 @@ restart:
                                vfsmnt = &mnt->mnt;
                                continue;
                        }
-                       /*
-                        * Filesystems needing to implement special "root names"
-                        * should do so with ->d_dname()
-                        */
-                       if (IS_ROOT(dentry) &&
-                          (dentry->d_name.len != 1 ||
-                           dentry->d_name.name[0] != '/')) {
-                               WARN(1, "Root dentry has weird name <%.*s>\n",
-                                    (int) dentry->d_name.len,
-                                    dentry->d_name.name);
-                       }
                        if (!error)
                                error = is_mounted(vfsmnt) ? 1 : 2;
                        break;