22 lines
560 B
Plaintext
22 lines
560 B
Plaintext
dnl #
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dnl # 2.6.36 API compatibility.
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dnl # Added usleep_range timer.
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dnl # usleep_range is a finer precision implementation of msleep
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dnl # designed to be a drop-in replacement for udelay where a precise
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dnl # sleep / busy-wait is unnecessary.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_USLEEP_RANGE], [
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AC_MSG_CHECKING([whether usleep_range() is available])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/delay.h>
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],[
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usleep_range(0, 0);
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_USLEEP_RANGE, 1,
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[usleep_range 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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