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authorFabio M. Di Nitto <fabbione@ubuntu.com>2008-01-30 10:56:42 -0600
committerDavid Teigland <teigland@redhat.com>2008-01-30 11:04:25 -0600
commite7847d35ac39fe92c94540e88ac3d0e177f52d9e (patch)
treebad098ef7b920e14ac253885510a21c05b6fe22b /fs
parent39bd4177ddbeb4c86e854d3d5c4a6a26088e601e (diff)
downloadlinux-e7847d35ac39fe92c94540e88ac3d0e177f52d9e.tar.gz
dlm: align midcomms message buffer
gcc does not guarantee that an auto buffer is 64bit aligned. This change allows sparc64 to work. Signed-off-by: Fabio M. Di Nitto <fabbione@ubuntu.com> Signed-off-by: David Teigland <teigland@redhat.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/dlm/midcomms.c15
1 files changed, 9 insertions, 6 deletions
diff --git a/fs/dlm/midcomms.c b/fs/dlm/midcomms.c
index f8c69dda16a..e69926e984d 100644
--- a/fs/dlm/midcomms.c
+++ b/fs/dlm/midcomms.c
@@ -2,7 +2,7 @@
*******************************************************************************
**
** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
-** Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
+** Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
**
** This copyrighted material is made available to anyone wishing to use,
** modify, copy, or redistribute it subject to the terms and conditions
@@ -58,8 +58,12 @@ static void copy_from_cb(void *dst, const void *base, unsigned offset,
int dlm_process_incoming_buffer(int nodeid, const void *base,
unsigned offset, unsigned len, unsigned limit)
{
- unsigned char __tmp[DLM_INBUF_LEN];
- struct dlm_header *msg = (struct dlm_header *) __tmp;
+ union {
+ unsigned char __buf[DLM_INBUF_LEN];
+ /* this is to force proper alignment on some arches */
+ struct dlm_header dlm;
+ } __tmp;
+ struct dlm_header *msg = &__tmp.dlm;
int ret = 0;
int err = 0;
uint16_t msglen;
@@ -100,8 +104,7 @@ int dlm_process_incoming_buffer(int nodeid, const void *base,
in the buffer on the stack (which should work for most
ordinary messages). */
- if (msglen > sizeof(__tmp) &&
- msg == (struct dlm_header *) __tmp) {
+ if (msglen > DLM_INBUF_LEN && msg == &__tmp.dlm) {
msg = kmalloc(dlm_config.ci_buffer_size, GFP_KERNEL);
if (msg == NULL)
return ret;
@@ -119,7 +122,7 @@ int dlm_process_incoming_buffer(int nodeid, const void *base,
dlm_receive_buffer(msg, nodeid);
}
- if (msg != (struct dlm_header *) __tmp)
+ if (msg != &__tmp.dlm)
kfree(msg);
return err ? err : ret;