+dnl #
+dnl # PaX Linux 2.6.x - 2.6.34 API
+dnl #
+AC_DEFUN([ZFS_AC_PAX_KERNEL_FSYNC_WITH_DENTRY], [
+ ZFS_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+ ],[
+ int (*fsync) (struct file *, struct dentry *, int) = NULL;
+ file_operations_no_const fops __attribute__ ((unused));
+
+ fops.fsync = fsync;
+ ],[
+ AC_MSG_RESULT([dentry])
+ AC_DEFINE(HAVE_FSYNC_WITH_DENTRY, 1,
+ [fops->fsync() with dentry])
+ ],[
+ ])
+])
+
+dnl #
+dnl # PaX Linux 2.6.35 - Linux 3.0 API
+dnl #
+AC_DEFUN([ZFS_AC_PAX_KERNEL_FSYNC_WITHOUT_DENTRY], [
+ ZFS_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+ ],[
+ int (*fsync) (struct file *, int) = NULL;
+ file_operations_no_const fops __attribute__ ((unused));
+
+ fops.fsync = fsync;
+ ],[
+ AC_MSG_RESULT([no dentry])
+ AC_DEFINE(HAVE_FSYNC_WITHOUT_DENTRY, 1,
+ [fops->fsync() without dentry])
+ ],[
+ ])
+])
+
+dnl #
+dnl # PaX Linux 3.1 - 3.x API
+dnl #
+AC_DEFUN([ZFS_AC_PAX_KERNEL_FSYNC_RANGE], [
+ ZFS_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+ ],[
+ int (*fsync) (struct file *, loff_t, loff_t, int) = NULL;
+ file_operations_no_const fops __attribute__ ((unused));
+
+ fops.fsync = fsync;
+ ],[
+ AC_MSG_RESULT([range])
+ AC_DEFINE(HAVE_FSYNC_RANGE, 1,
+ [fops->fsync() with range])
+ ],[
+ ])
+])
+