PR/50776 CVS commit: src/sys/kern

["SAITOH Masanobu" <msaitoh%netbsd.org@localhost>]

The following reply was made to PR pkg/50776; it has been noted by GNATS.

From: "SAITOH Masanobu" <msaitoh%netbsd.org@localhost>
To: gnats-bugs%gnats.NetBSD.org@localhost
Cc: 
Subject: PR/50776 CVS commit: src/sys/kern
Date: Thu, 2 Aug 2018 04:28:56 +0000

 Module Name:	src
 Committed By:	msaitoh
 Date:		Thu Aug  2 04:28:56 UTC 2018
 
 Modified Files:
 	src/sys/kern: uipc_mbuf2.c
 
 Log Message:
 Adjust alignment in m_pulldown().
 
  IP6_EXTHDR_GET() and M_REGION_GET() do m_pulldown(). When m_pulldown() copies
 data into M_TRAILINGSPACE, the alignment might be changed. There are a lot of
 IP6_EXTHDR_GET() calls, so I think it's not good to check the alignment after
 every IP6_EXTHDR_GET() call. This change fixes this problem in m_pulldown().
 In this commit, the next mbuf are 4 byte aligned. For networking, I've never
 heard that 64bit alignment is required, so I think it would be OK.
 
  I don't know this is the best solution, but it's better than nothing.
 
  OK'd by maxv@.
 
  After committing this change, the workaround code for PR#50776 can be removed.
 
 
 To generate a diff of this commit:
 cvs rdiff -u -r1.32 -r1.33 src/sys/kern/uipc_mbuf2.c
 
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.