LU-12400 osd-ldiskfs: support multi-page bvec

[fs/lustre-release.git] / config / lustre-build-ldiskfs.m4

diff --git a/config/lustre-build-ldiskfs.m4 b/config/lustre-build-ldiskfs.m4
index e1c64a2..8c295b5 100644 (file)
--- a/config/lustre-build-ldiskfs.m4
+++ b/config/lustre-build-ldiskfs.m4
@@ -261,6 +261,28 @@ AC_DEFUN([LDISKFS_AC_PATCH_PROGRAM], [
 ]) # LDISKFS_AC_PATCH_PROGRAM
 
 #
+# LB_HAVE_BVEC_ITER_ALL
+#
+# kernel 5.1 commit 6dc4f100c175dd0511ae8674786e7c9006cdfbfa
+# block: allow bio_for_each_segment_all() to iterate over multi-page bvec
+#
+AC_DEFUN([LB_HAVE_BVEC_ITER_ALL], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_COMPILE([if bvec_iter_all exists for multi-page bvec iternation],
+ext4fs_dirhash, [
+       #include <linux/bvec.h>
+],[
+       struct bvec_iter_all iter;
+       (void)iter;
+],[
+       AC_DEFINE(HAVE_BVEC_ITER_ALL, 1,
+               [if bvec_iter_all exists for multi-page bvec iternation])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LB_HAVE_BVEC_ITER_ALL
+
+#
 # LB_CONFIG_LDISKFS
 #
 AC_DEFUN([LB_CONFIG_LDISKFS], [
@@ -309,6 +331,7 @@ AS_IF([test x$enable_ldiskfs != xno],[
        LB_EXT4_HAVE_INFO_DQUOT
        LB_EXT4_HAVE_I_CRYPT_INFO
        LB_LDISKFS_IGET_HAS_FLAGS_ARG
+       LB_HAVE_BVEC_ITER_ALL
        AC_DEFINE(CONFIG_LDISKFS_FS_POSIX_ACL, 1, [posix acls for ldiskfs])
        AC_DEFINE(CONFIG_LDISKFS_FS_SECURITY, 1, [fs security for ldiskfs])
        AC_DEFINE(CONFIG_LDISKFS_FS_XATTR, 1, [extened attributes for ldiskfs])