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dlm: align midcomms message buffer

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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>
This commit is contained in:
Fabio M. Di Nitto 2008-01-30 10:56:42 -06:00 committed by David Teigland
parent 39bd4177dd
commit e7847d35ac
1 changed files with 9 additions and 6 deletions
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15
fs/dlm/midcomms.c
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@ -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;