38 lines
1 KiB
Text
38 lines
1 KiB
Text
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dnl #
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dnl # Linux 5.5 API,
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dnl #
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dnl # The Linux 5.5 kernel updated percpu_ref_tryget() which is inlined by
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dnl # blkg_tryget() to use rcu_read_lock() instead of rcu_read_lock_sched().
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dnl # As a side effect the function was converted to GPL-only.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKG_TRYGET], [
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ZFS_LINUX_TEST_SRC([blkg_tryget], [
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#include <linux/blk-cgroup.h>
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#include <linux/bio.h>
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#include <linux/fs.h>
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],[
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struct blkcg_gq blkg __attribute__ ((unused));
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bool rc __attribute__ ((unused));
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rc = blkg_tryget(&blkg);
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], [], [$ZFS_META_LICENSE])
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])
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AC_DEFUN([ZFS_AC_KERNEL_BLKG_TRYGET], [
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AC_MSG_CHECKING([whether blkg_tryget() is available])
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ZFS_LINUX_TEST_RESULT([blkg_tryget], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_BLKG_TRYGET, 1, [blkg_tryget() is available])
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AC_MSG_CHECKING([whether blkg_tryget() is GPL-only])
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ZFS_LINUX_TEST_RESULT([blkg_tryget_license], [
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AC_MSG_RESULT(no)
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_BLKG_TRYGET_GPL_ONLY, 1,
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[blkg_tryget() GPL-only])
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])
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],[
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AC_MSG_RESULT(no)
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])
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])
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