20 lines
523 B
Text
20 lines
523 B
Text
dnl #
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dnl # 2.6.32 - 4.11, statically allocated bdi in request_queue
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dnl # 4.12 - x.y, dynamically allocated bdi in request_queue
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_BDI], [
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AC_MSG_CHECKING([whether blk_queue bdi is dynamic])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/blkdev.h>
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],[
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struct request_queue q;
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struct backing_dev_info bdi;
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q.backing_dev_info = &bdi;
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_BLK_QUEUE_BDI_DYNAMIC, 1,
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[blk queue backing_dev_info is dynamic])
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],[
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AC_MSG_RESULT(no)
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])
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])
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