2010-08-26 18:22:58 +00:00
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dnl #
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dnl # 2.6.30 API change
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dnl # bdev_hardsect_size() replaced with bdev_logical_block_size(). While
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dnl # it has been true for a while that there was no strict 1:1 mapping
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dnl # between physical sector size and logical block size this change makes
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dnl # it explicit.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_BDEV_LOGICAL_BLOCK_SIZE], [
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AC_MSG_CHECKING([whether bdev_logical_block_size() is available])
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2011-11-29 22:31:20 +00:00
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tmp_flags="$EXTRA_KCFLAGS"
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2013-01-11 00:09:31 +00:00
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EXTRA_KCFLAGS="${NO_UNUSED_BUT_SET_VARIABLE}"
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2010-08-26 18:22:58 +00:00
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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 block_device *bdev = NULL;
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bdev_logical_block_size(bdev);
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_BDEV_LOGICAL_BLOCK_SIZE, 1,
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[bdev_logical_block_size() is available])
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],[
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AC_MSG_RESULT(no)
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])
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2011-11-29 22:31:20 +00:00
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EXTRA_KCFLAGS="$tmp_flags"
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2010-08-26 18:22:58 +00:00
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])
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