AS_IF([test -z "$LDISKFS_SERIES"], [
AS_IF([test x$RHEL_KERNEL = xyes], [
case $RHEL_RELEASE_NO in
+ 83) LDISKFS_SERIES="4.18-rhel8.3.series" ;;
82) LDISKFS_SERIES="4.18-rhel8.2.series" ;;
81) LDISKFS_SERIES="4.18-rhel8.1.series" ;;
80) LDISKFS_SERIES="4.18-rhel8.series" ;;
]) # LB_EXT4_HAVE_I_CRYPT_INFO
#
+# LB_LDISKFS_JOURNAL_ENSURE_CREDITS
+#
+# kernel 4.18.0-240.1.1.el8 and
+# kernel 5.4 commit a413036791d040e33badcc634453a4d0c0705499
+#
+# ext4_journal_ensure_credits was introduced to ensure given handle
+# has at least requested amount of credits available, and possibly
+# restarting transaction if needed.
+#
+AC_DEFUN([LB_LDISKFS_JOURNAL_ENSURE_CREDITS], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_COMPILE([if 'ext4_journal_ensure_credits' exists],
+ext4_journal_ensure_credits, [
+ #include "$EXT4_SRC_DIR/ext4_jbd2.h"
+],[
+ ext4_journal_ensure_credits(NULL, 0, 0);
+],[
+ AC_DEFINE(HAVE_LDISKFS_JOURNAL_ENSURE_CREDITS, 1,
+ ['ext4_journal_ensure_credits' exists])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LB_LDISKFS_JOURNAL_ENSURE_CREDITS
+
+#
# LB_LDISKFS_IGET_HAS_FLAGS_ARG
#
# kernel 4.19 commit 8a363970d1dc38c4ec4ad575c862f776f468d057
LB_EXT4_BREAD_4ARGS
LB_EXT4_HAVE_INFO_DQUOT
LB_EXT4_HAVE_I_CRYPT_INFO
+ LB_LDISKFS_JOURNAL_ENSURE_CREDITS
LB_LDISKFS_IGET_HAS_FLAGS_ARG
LB_LDISKFS_FIND_ENTRY_LOCKED_EXISTS
LB_LDISKFSFS_DIRHASH_WANTS_DIR