As __iget is not exported by the kernel, replace it with igrab.

--- a/libcfs/libcfs/crypto/keyring.c
+++ b/libcfs/libcfs/crypto/keyring.c
@@ -660,13 +660,8 @@ static void evict_dentries_for_decrypted
 
 	list_for_each_entry(ci, &mk->mk_decrypted_inodes, ci_master_key_link) {
 		inode = ci->ci_inode;
-		spin_lock(&inode->i_lock);
-		if (inode->i_state & (I_FREEING | I_WILL_FREE | I_NEW)) {
-			spin_unlock(&inode->i_lock);
+		if (igrab(inode) == NULL)
 			continue;
-		}
-		__iget(inode);
-		spin_unlock(&inode->i_lock);
 		spin_unlock(&mk->mk_decrypted_inodes_lock);
 
 		shrink_dcache_inode(inode);