Eliminate runtime function pointer mods in autotools checks

[zfs.git] / config / kernel-lookup-nameidata.m4

diff --git a/config/kernel-lookup-nameidata.m4 b/config/kernel-lookup-nameidata.m4
index 5e30be4..6455603 100644 (file)
--- a/config/kernel-lookup-nameidata.m4
+++ b/config/kernel-lookup-nameidata.m4
@@ -5,13 +5,17 @@ AC_DEFUN([ZFS_AC_KERNEL_LOOKUP_NAMEIDATA], [
        AC_MSG_CHECKING([whether iops->lookup() takes struct nameidata])
        ZFS_LINUX_TRY_COMPILE([
                #include <linux/fs.h>
-       ],[
-               struct dentry * (*inode_lookup) (struct inode *,struct dentry *,
-                                    struct nameidata *) = NULL;
-               struct inode_operations iops __attribute__ ((unused)) = {
-                       .lookup         = inode_lookup,
+
+               struct dentry *inode_lookup(struct inode *inode,
+                   struct dentry *dentry, struct nameidata *nidata)
+                   { return NULL; }
+
+               static const struct inode_operations iops
+                   __attribute__ ((unused)) = {
+                       .lookup = inode_lookup,
                };
        ],[
+       ],[
                AC_MSG_RESULT(yes)
                AC_DEFINE(HAVE_LOOKUP_NAMEIDATA, 1,
                          [iops->lookup() operation takes nameidata])