+#
+# LIBCFS_KERNEL_SETSOCKOPT
+#
+# kernel v5.8-rc1~165^2~59^2
+# net: remove kernel_setsockopt
+AC_DEFUN([LIBCFS_KERNEL_SETSOCKOPT], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_COMPILE([if kernel_setsockopt still in use],
+kernel_setsockopt_exists, [
+ #include <linux/net.h>
+],[
+ kernel_setsockopt(NULL, 0, 0, NULL, 0);
+],[
+ AC_DEFINE(HAVE_KERNEL_SETSOCKOPT, 1,
+ [kernel_setsockopt still in use])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LIBCFS_KERNEL_SETSOCKOPT
+
+#
+# LIBCFS_SEC_RELEASE_SECCTX
+#
+# kernel linux-hwe-5.8 (5.8.0-22.23~20.04.1)
+# LSM: Use lsmcontext in security_release_secctx
+AC_DEFUN([LIBCFS_SEC_RELEASE_SECCTX], [
+LB_CHECK_COMPILE([if security_release_secctx has 1 arg],
+security_release_secctx_1arg, [
+ #include <linux/security.h>
+],[
+ security_release_secctx(NULL);
+],[
+ AC_DEFINE(HAVE_SEC_RELEASE_SECCTX_1ARG, 1,
+ [security_release_secctx has 1 arg.])
+])
+]) # LIBCFS_SEC_RELEASE_SECCTX
+
+#
+# LIBCFS_HAVE_KFREE_SENSITIVE
+#
+# kernel v5.10-rc1~3
+# mm: remove kzfree() compatibility definition
+#
+AC_DEFUN([LIBCFS_HAVE_KFREE_SENSITIVE], [
+LB_CHECK_COMPILE([if kfree_sensitive() is available],
+kfree_sensitive_exists, [
+ #include <linux/slab.h>
+
+],[
+ kfree_sensitive(NULL);
+],[
+ AC_DEFINE(HAVE_KFREE_SENSITIVE, 1,
+ [kfree_sensitive() is available.])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LIBCFS_HAVE_KFREE_SENSITIVE
+
+#
+# LIBCFS_HAVE_CRYPTO_SHA2_HEADER
+#
+# Kernel v5.10-rc1-114-ga24d22b225ce
+# crypto: sha - split sha.h into sha1.h and sha2.h
+#
+AC_DEFUN([LIBCFS_HAVE_CRYPTO_SHA2_HEADER], [
+LB_CHECK_LINUX_HEADER([crypto/sha2.h], [
+ AC_DEFINE(HAVE_CRYPTO_SHA2_HEADER, 1,
+ [crypto/sha2.h is present])])
+]) # LIBCFS_HAVE_CRYPTO_SHA2_HEADER
+
+#
+# LIBCFS_HAVE_LIST_CMP_FUNC_T
+#
+# kernel 5.10.70 commit 4f0f586bf0c898233d8f316f471a21db2abd522d
+# treewide: Change list_sort to use const pointers
+AC_DEFUN([LIBCFS_HAVE_LIST_CMP_FUNC_T], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror -Wno-unused-variable"
+LB_CHECK_COMPILE([if list_cmp_func_t type is defined],
+list_cmp_func_t, [
+ #include <linux/list_sort.h>
+],[
+ list_cmp_func_t cmp;
+],[
+ AC_DEFINE(HAVE_LIST_CMP_FUNC_T, 1,
+ [list_cmp_func_t type is defined])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LIBCFS_HAVE_LIST_CMP_FUNC_T
+
+#
+# LIBCFS_NLA_STRSCPY
+#
+# Kernel version 5.10-rc3 commit 872f690341948b502c93318f806d821c56772c42
+# replaced nla_strlcpy() with nla_strscpy().
+#
+AC_DEFUN([LIBCFS_SRC_NLA_STRSCPY], [
+ LB2_LINUX_TEST_SRC([nla_strscpy], [
+ #include <net/netlink.h>
+ ],[
+ if (nla_strscpy(NULL, NULL, 0) < 0)
+ return -EINVAL;
+ ],[
+ ],[])
+])
+AC_DEFUN([LIBCFS_NLA_STRSCPY], [
+ AC_MSG_CHECKING([if 'nla_strscpy()' exists])
+ LB2_LINUX_TEST_RESULT([nla_strscpy], [
+ AC_DEFINE(HAVE_NLA_STRSCPY, 1,
+ ['nla_strscpy' is available])
+ AC_MSG_RESULT(yes)
+ ],[
+ AC_MSG_RESULT(no)
+ ])
+]) # LIBCFS_NLA_STRSCPY
+
+#
+# LIBCFS_HAVE_CIPHER_HEADER
+#
+# Kernel 5.12 commit 0eb76ba29d16df2951d37c54ca279c4e5630b071
+# crypto: remove cipher routines from public crypto API
+#
+AC_DEFUN([LIBCFS_HAVE_CIPHER_HEADER], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_LINUX_HEADER([crypto/internal/cipher.h], [
+ AC_DEFINE(HAVE_CIPHER_H, 1,
+ [crypto/internal/cipher.h is present])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LIBCFS_HAVE_CIPHER_HEADER
+
+#
+# LIBCFS_HAVE_TASK_RUNNING
+#
+# Kernel 5.13-rc6 commit b03fbd4ff24c5f075e58eb19261d5f8b3e40d
+# introduced task_is_running() macro.
+#
+AC_DEFUN([LIBCFS_HAVE_TASK_IS_RUNNING], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_COMPILE([if task_is_running() is defined],
+task_is_running, [
+ #include <linux/sched.h>
+],[
+ if (task_is_running(current))
+ schedule();
+],[
+ AC_DEFINE(HAVE_TASK_IS_RUNNING, 1,
+ [task_is_running() is defined])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LIBCFS_HAVE_TASK_IS_RUNNING
+
+#
+# LIBCFS_LINUX_STDARG_HEADER
+#
+# Kernel 5.14-rc5 commit c0891ac15f0428ffa81b2e818d416bdf3cb74ab6
+# isystem: ship and use stdarg.h
+#
+AC_DEFUN([LIBCFS_LINUX_STDARG_HEADER], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_LINUX_HEADER([linux/stdarg.h], [
+ AC_DEFINE(HAVE_LINUX_STDARG_HEADER, 1, [linux/stdarg.h is present])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LIBCFS_LINUX_STDARG_HEADER
+
+#
+# LIBCFS_HAVE_PANIC_NOTIFIER_HEADER
+#
+# Kernel 5.14 commit f39650de687e35766572ac89dbcd16a5911e2f0a
+# kernel.h: split out panic and oops helpers
+#
+AC_DEFUN([LIBCFS_HAVE_PANIC_NOTIFIER_HEADER], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_LINUX_HEADER([linux/panic_notifier.h], [
+ AC_DEFINE(HAVE_PANIC_NOTIFIER_H, 1,
+ [linux/panic_notifier.h is present])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LIBCFS_HAVE_PANIC_NOTIFIER_HEADER
+
+#
+# LIBCFS_PARAM_SET_UINT_MINMAX
+#
+# Kernel 5.15-rc1 commit 2a14c9ae15a38148484a128b84bff7e9ffd90d68
+# moved param_set_uint_minmax to common code
+#
+AC_DEFUN([LIBCFS_PARAM_SET_UINT_MINMAX],[
+LB_CHECK_COMPILE([does function 'param_set_uint_minmax' exist],
+param_set_uint_minmax, [
+ #include <linux/moduleparam.h>
+],[
+ param_set_uint_minmax(NULL, NULL, 0, 0);
+],[
+ AC_DEFINE(HAVE_PARAM_SET_UINT_MINMAX, 1,
+ ['param_set_uint_minmax' is available])
+])
+]) # LIBCFS_PARAM_SET_UINT_MINMAX
+
+AC_DEFUN([LIBCFS_PROG_LINUX_SRC], [
+ # 5.6
+ LIBCFS_SRC_HAVE_PROC_OPS
+ # 5.10
+ LIBCFS_SRC_NLA_STRSCPY
+
+ AC_MSG_CHECKING([for available kernel interfaces to libcfs])
+ LB2_LINUX_TEST_COMPILE_ALL([libcfs])
+ AC_MSG_RESULT([done])
+])
+AC_DEFUN([LIBCFS_PROG_LINUX_RESULTS], [
+ # 5.6
+ LIBCFS_HAVE_PROC_OPS
+ # 5.10
+ LIBCFS_NLA_STRSCPY
+])
+
+#
+# LIBCFS_LINUX_BLK_INTEGRITY_HEADER
+#
+# Kernel 5.15-rc6 commit fe45e630a1035aea94c29016f2598bbde149bbe3
+# block: move integrity handling out of <linux/blkdev.h>
+#
+AC_DEFUN([LIBCFS_LINUX_BLK_INTEGRITY_HEADER], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_LINUX_HEADER([linux/blk-integrity.h], [
+ AC_DEFINE(HAVE_LINUX_BLK_INTEGRITY_HEADER, 1,
+ [linux/blk-integrity.h is present])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LIBCFS_LINUX_BLK_INTEGRITY_HEADER