Linux 5.0 compat: Fix bio_set_dev()

[mirror_zfs.git] / config / kernel-bio_set_dev.m4

diff --git a/config/kernel-bio_set_dev.m4 b/config/kernel-bio_set_dev.m4
index 6be873c56154b908951ac70415ce0f7b6301c46b..71d47a89309f0ec88136442e97a1fb8661f6f41a 100644 (file)
--- a/config/kernel-bio_set_dev.m4
+++ b/config/kernel-bio_set_dev.m4
@@ -1,10 +1,10 @@
 dnl #
 dnl # Linux 4.14 API,
 dnl #
-dnl # The bio_set_dev() helper was introduced as part of the transition
+dnl # The bio_set_dev() helper macro was introduced as part of the transition
 dnl # to have struct gendisk in struct bio. 
 dnl #
-AC_DEFUN([ZFS_AC_KERNEL_BIO_SET_DEV], [
+AC_DEFUN([ZFS_AC_KERNEL_BIO_SET_DEV_MACRO], [
        AC_MSG_CHECKING([whether bio_set_dev() exists])
        ZFS_LINUX_TRY_COMPILE([
                #include <linux/bio.h>
@@ -20,3 +20,34 @@ AC_DEFUN([ZFS_AC_KERNEL_BIO_SET_DEV], [
                AC_MSG_RESULT(no)
        ])
 ])
+
+dnl #
+dnl # Linux 5.0 API,
+dnl #
+dnl # The bio_set_dev() helper macro was updated to internally depend on
+dnl # bio_associate_blkg() symbol which is exported GPL-only.
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_BIO_SET_DEV_GPL_ONLY], [
+       AC_MSG_CHECKING([whether bio_set_dev() is GPL-only])
+       ZFS_LINUX_TRY_COMPILE([
+               #include <linux/module.h>
+               #include <linux/bio.h>
+               #include <linux/fs.h>
+               MODULE_LICENSE("$ZFS_META_LICENSE");
+       ],[
+               struct block_device *bdev = NULL;
+               struct bio *bio = NULL;
+               bio_set_dev(bio, bdev);
+       ],[
+               AC_MSG_RESULT(no)
+       ],[
+               AC_MSG_RESULT(yes)
+               AC_DEFINE(HAVE_BIO_SET_DEV_GPL_ONLY, 1,
+                   [bio_set_dev() GPL-only])
+       ])
+])
+
+AC_DEFUN([ZFS_AC_KERNEL_BIO_SET_DEV], [
+       ZFS_AC_KERNEL_BIO_SET_DEV_MACRO
+       ZFS_AC_KERNEL_BIO_SET_DEV_GPL_ONLY
+])