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When the code was ported to Mac OS/X, mbuf handling functions were converted to using the Mac OS/X accessor functions. For FreeBSD, they are a simple set of macros in sys/fs/nfs/nfskpiport.h. Since porting to Mac OS/X is no longer a consideration, replacement of these macros with the code generated by them makes the code more readable. When support for external page mbufs is added as needed by the KERN_TLS, the patch becomes simpler if done without the macros. This patch should not result in any semantic change. This is the final patch of this series and the macros should now be able to be deleted from the .h files in a future commit.
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