26 lines
649 B
Plaintext
26 lines
649 B
Plaintext
dnl #
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dnl # 2.6.36 API, exported elevator_change() symbol
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dnl # 4.12 API, removed elevator_change() symbol
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_ELEVATOR_CHANGE], [
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AC_MSG_CHECKING([whether elevator_change() is available])
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tmp_flags="$EXTRA_KCFLAGS"
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EXTRA_KCFLAGS="${NO_UNUSED_BUT_SET_VARIABLE}"
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/blkdev.h>
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#include <linux/elevator.h>
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],[
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int ret;
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struct request_queue *q = NULL;
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char *elevator = NULL;
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ret = elevator_change(q, elevator);
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_ELEVATOR_CHANGE, 1,
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[elevator_change() is available])
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],[
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AC_MSG_RESULT(no)
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])
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EXTRA_KCFLAGS="$tmp_flags"
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])
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