mirror of https://github.com/openzfs/zfs.git
39 lines
976 B
Plaintext
39 lines
976 B
Plaintext
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dnl #
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dnl # 2.6.29 API change
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dnl # In the 2.6.29 kernel blk_rq_bytes() was available as a GPL-only symbol.
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dnl # So we need to check the symbol license as well. As of 2.6.31 the
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dnl blk_rq_bytes() helper was changed to a static inline which we can use.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_BLK_RQ_BYTES], [
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AC_MSG_CHECKING([whether blk_rq_bytes() 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 request *req = NULL;
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(void) blk_rq_bytes(req);
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_BLK_RQ_BYTES, 1,
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[blk_rq_bytes() is available])
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],[
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AC_MSG_RESULT(no)
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])
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AC_MSG_CHECKING([whether blk_rq_bytes() is GPL-only])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/module.h>
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#include <linux/blkdev.h>
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MODULE_LICENSE("CDDL");
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],[
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struct request *req = NULL;
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(void) blk_rq_bytes(req);
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],[
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AC_MSG_RESULT(no)
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_BLK_RQ_BYTES_GPL_ONLY, 1,
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[blk_rq_bytes() is GPL-only])
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])
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])
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