20 lines
509 B
Text
20 lines
509 B
Text
dnl #
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dnl # 2.6.33 API change
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dnl # Discard granularity and alignment restrictions may now be set.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_DISCARD_GRANULARITY], [
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AC_MSG_CHECKING([whether ql->discard_granularity is available])
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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 queue_limits ql __attribute__ ((unused));
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ql.discard_granularity = 0;
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_DISCARD_GRANULARITY, 1,
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[ql->discard_granularity is available])
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],[
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AC_MSG_RESULT(no)
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])
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])
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