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Linux 5.0 compat: Fix bio_set_dev()

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The Linux 5.0 kernel updated the bio_set_dev() macro so it calls the
GPL-only bio_associate_blkg() symbol thus inadvertently converting
the entire macro.  Provide a minimal version which always assigns the
request queue's root_blkg to the bio.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #8287
This commit is contained in:
Brian Behlendorf
2019-01-16 10:39:19 -08:00
parent 0c593296e9
commit 26a856594f
2 changed files with 60 additions and 4 deletions
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config/kernel-bio_set_dev.m4
+33 -2
View File
@@ -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
])