From: Marc Dionne <marc.c.dionne@gmail.com>
Date: Sat, 14 May 2011 17:19:52 +0000 (-0400)
Subject: Linux: fix permission op test for certain compilers
X-Git-Tag: debian/1.6.0.pre5-1~2
X-Git-Url: https://git.michaelhowe.org/gitweb/?a=commitdiff_plain;h=bb82255a059fe843e41449e8cbed89aa068dc82a;p=packages%2Fo%2Fopenafs.git

Linux: fix permission op test for certain compilers

Some compilers complain that _inode is used uninitialised here.
Since this test requires -Werror, it causes the test to fail
and our permission op to be used in RCU mode, leading to lockups.

Initialise it to make the compilers happy.

Fixes a lockup seen on kernels 2.6.38+ on Gentoo and Debian.

Change-Id: Id6325e3a5a918906d547d241a39de777fb394fdc
---

diff --git a/src/cf/linux-test4.m4 b/src/cf/linux-test4.m4
index 64bd8abd9..2292f811f 100644
--- a/src/cf/linux-test4.m4
+++ b/src/cf/linux-test4.m4
@@ -248,7 +248,7 @@ AC_DEFUN([LINUX_IOP_I_PERMISSION_TAKES_FLAGS], [
   AC_CHECK_LINUX_BUILD([whether inode_operations.permission takes flags],
 			[ac_cv_linux_func_i_permission_takes_flags],
 			[#include <linux/fs.h>],
-			[struct inode _inode;
+			[struct inode _inode = {0};
 			unsigned int flags = 0;
 			(void)_inode.i_op->permission(&_inode, 0, flags);],
 		       [IOP_PERMISSION_TAKES_FLAGS],