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| author | Fabio M. Di Nitto <fabbione@ubuntu.com> | 2008-01-30 10:56:42 -0600 |
|---|---|---|
| committer | David Teigland <teigland@redhat.com> | 2008-01-30 11:04:25 -0600 |
| commit | e7847d35ac39fe92c94540e88ac3d0e177f52d9e (patch) | |
| tree | bad098ef7b920e14ac253885510a21c05b6fe22b | |
| parent | 39bd4177ddbeb4c86e854d3d5c4a6a26088e601e (diff) | |
| download | linux-e7847d35ac39fe92c94540e88ac3d0e177f52d9e.tar.gz linux-e7847d35ac39fe92c94540e88ac3d0e177f52d9e.tar.bz2 linux-e7847d35ac39fe92c94540e88ac3d0e177f52d9e.zip | |
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>
| -rw-r--r-- | fs/dlm/midcomms.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/fs/dlm/midcomms.c b/fs/dlm/midcomms.c index f8c69dda16a0..e69926e984db 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; |