+# LC_HAVE_VM_FAULT_ADDRESS
+#
+# Kernel version 4.10 commit 1a29d85eb0f19b7d8271923d8917d7b4f5540b3e
+# removed virtual_address field. Need to use address field instead
+#
+AC_DEFUN([LC_HAVE_VM_FAULT_ADDRESS], [
+LB_CHECK_COMPILE([if 'struct vm_fault' replaced virtual_address with address field],
+vm_fault_address, [
+ #include <linux/mm.h>
+],[
+ struct vm_fault vmf;
+ vmf.address = NULL;
+],[
+ AC_DEFINE(HAVE_VM_FAULT_ADDRESS, 1,
+ [virtual_address has been replaced by address field])
+])
+]) # LC_HAVE_VM_FAULT_ADDRESS
+
+#
+# LC_INODEOPS_ENHANCED_GETATTR
+#
+# Kernel version 4.11 commit a528d35e8bfcc521d7cb70aaf03e1bd296c8493f
+# expanded getattr to be able to get more stat information.
+#
+AC_DEFUN([LC_INODEOPS_ENHANCED_GETATTR], [
+LB_CHECK_COMPILE([if 'inode_operations' getattr member can gather advance stats],
+getattr_path, [
+ #include <linux/fs.h>
+],[
+ struct path path;
+
+ ((struct inode_operations *)1)->getattr(&path, NULL, 0, 0);
+],[
+ AC_DEFINE(HAVE_INODEOPS_ENHANCED_GETATTR, 1,
+ [inode_operations .getattr member function can gather advance stats])
+])
+]) # LC_INODEOPS_ENHANCED_GETATTR
+
+#
+# LC_VM_OPERATIONS_REMOVE_VMF_ARG
+#
+# Kernel version 4.11 commit 11bac80004499ea59f361ef2a5516c84b6eab675
+# removed struct vm_area_struct as an argument for vm_operations since
+# in the same kernel version struct vma_area_struct was folded into
+# struct vm_fault.
+#
+AC_DEFUN([LC_VM_OPERATIONS_REMOVE_VMF_ARG], [
+LB_CHECK_COMPILE([if 'struct vm_operations' removed struct vm_area_struct],
+vm_operations_no_vm_area_struct, [
+ #include <linux/mm.h>
+],[
+ struct vm_fault vmf;
+
+ ((struct vm_operations_struct *)0)->fault(&vmf);
+ ((struct vm_operations_struct *)0)->page_mkwrite(&vmf);
+],[
+ AC_DEFINE(HAVE_VM_OPS_USE_VM_FAULT_ONLY, 1,
+ ['struct vm_operations' remove struct vm_area_struct argument])
+])
+]) # LC_VM_OPERATIONS_REMOVE_VMF_ARG
+
+#
+# Kernel version 4.12 commit 47f38c539e9a42344ff5a664942075bd4df93876
+# CURRENT_TIME is not 64 bit time safe so it was replaced with
+# current_time()
+#
+AC_DEFUN([LC_CURRENT_TIME], [
+LB_CHECK_COMPILE([if CURRENT_TIME has been replaced with current_time],
+current_time, [
+ #include <linux/fs.h>
+],[
+ struct timespec ts = current_time(NULL);
+],[
+ AC_DEFINE(HAVE_CURRENT_TIME, 1,
+ [current_time() has replaced CURRENT_TIME])
+])
+]) # LIBCFS_CURRENT_TIME
+
+#
+# LC_SUPER_SETUP_BDI_NAME
+#
+# Kernel version 4.12 commit 9594caf216dc0fe3e318b34af0127276db661241
+# unified bdi handling
+#
+AC_DEFUN([LC_SUPER_SETUP_BDI_NAME], [
+LB_CHECK_COMPILE([if 'super_setup_bdi_name' exist],
+super_setup_bdi_name, [
+ #include <linux/fs.h>
+],[
+ super_setup_bdi_name(NULL, "lustre");
+],[
+ AC_DEFINE(HAVE_SUPER_SETUP_BDI_NAME, 1,
+ ['super_setup_bdi_name' is available])
+])
+]) # LC_SUPER_SETUP_BDI_NAME
+
+#
+# LC_BI_STATUS
+#
+# 4.12 replace bi_error to bi_status
+#
+AC_DEFUN([LC_BI_STATUS], [
+LB_CHECK_COMPILE([if 'bi_status' exist],
+bi_status, [
+ #include <linux/blk_types.h>
+],[
+ ((struct bio *)0)->bi_status = 0;
+],[
+ AC_DEFINE(HAVE_BI_STATUS, 1,
+ ['bi_status' is available])
+])
+]) # LC_BI_STATUS
+
+#
+# LC_BIO_INTEGRITY_ENABLED
+#
+# 4.13 removed bio_integrity_enabled
+#
+AC_DEFUN([LC_BIO_INTEGRITY_ENABLED], [
+LB_CHECK_COMPILE([if 'bio_integrity_enabled' exist],
+bio_integrity_enabled, [
+ #include <linux/bio.h>
+],[
+ bio_integrity_enabled(NULL);
+],[
+ AC_DEFINE(HAVE_BIO_INTEGRITY_ENABLED, 1,
+ ['bio_integrity_enabled' is available])
+])
+]) # LC_BIO_INTEGRITY_ENABLED
+
+#
+# LC_PAGEVEC_INIT_ONE_PARAM
+#
+# 4.14 pagevec_init takes one parameter
+#
+AC_DEFUN([LC_PAGEVEC_INIT_ONE_PARAM], [
+LB_CHECK_COMPILE([if 'pagevec_init' takes one parameter],
+pagevec_init, [
+ #include <linux/pagevec.h>
+],[
+ pagevec_init(NULL);
+],[
+ AC_DEFINE(HAVE_PAGEVEC_INIT_ONE_PARAM, 1,
+ ['pagevec_init' takes one parameter])
+])
+]) # LC_PAGEVEC_INIT_ONE_PARAM
+
+#
+# LC_BI_BDEV
+#
+# 4.14 replaced bi_bdev to bi_disk
+#
+AC_DEFUN([LC_BI_BDEV], [
+LB_CHECK_COMPILE([if 'bi_bdev' exist],
+bi_bdev, [
+ #include <linux/bio.h>
+],[
+ ((struct bio *)0)->bi_bdev = NULL;
+],[
+ AC_DEFINE(HAVE_BI_BDEV, 1,
+ ['bi_bdev' is available])
+])
+]) # LC_BI_BDEV
+
+
+#