[PATCH] connector: some fixes for ia64 unaligned access errors

On ia64, the various functions that make up cn_proc.c cause kernel
unaligned access errors.

If you are using these, for example, to get notification about all tasks
forking and exiting, you get multiple unaligned access errors per process.

Use put_unaligned() in the appropriate palces to fix this.

Signed-off-by: Erik Jacobson <erikj@sgi.com>
Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: <stable@kernel.org>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/connector/cn_proc.c b/drivers/connector/cn_proc.c
index 3ece6923134359a9e70c841e8e592b589ea864ab..5c9f67f98d10b43e58b2736d07ca76b8f498faac 100644 (file)
--- a/drivers/connector/cn_proc.c
+++ b/drivers/connector/cn_proc.c
@@ -28,6 +28,7 @@
 #include <linux/init.h>
 #include <linux/connector.h>
 #include <asm/atomic.h>
+#include <asm/unaligned.h>
 
 #include <linux/cn_proc.h>
 
@@ -60,7 +61,7 @@ void proc_fork_connector(struct task_struct *task)
        ev = (struct proc_event*)msg->data;
        get_seq(&msg->seq, &ev->cpu);
        ktime_get_ts(&ts); /* get high res monotonic timestamp */
-       ev->timestamp_ns = timespec_to_ns(&ts);
+       put_unaligned(timespec_to_ns(&ts), (__u64 *)&ev->timestamp_ns);
        ev->what = PROC_EVENT_FORK;
        ev->event_data.fork.parent_pid = task->real_parent->pid;
        ev->event_data.fork.parent_tgid = task->real_parent->tgid;
@@ -88,7 +89,7 @@ void proc_exec_connector(struct task_struct *task)
        ev = (struct proc_event*)msg->data;
        get_seq(&msg->seq, &ev->cpu);
        ktime_get_ts(&ts); /* get high res monotonic timestamp */
-       ev->timestamp_ns = timespec_to_ns(&ts);
+       put_unaligned(timespec_to_ns(&ts), (__u64 *)&ev->timestamp_ns);
        ev->what = PROC_EVENT_EXEC;
        ev->event_data.exec.process_pid = task->pid;
        ev->event_data.exec.process_tgid = task->tgid;
@@ -124,7 +125,7 @@ void proc_id_connector(struct task_struct *task, int which_id)
                return;
        get_seq(&msg->seq, &ev->cpu);
        ktime_get_ts(&ts); /* get high res monotonic timestamp */
-       ev->timestamp_ns = timespec_to_ns(&ts);
+       put_unaligned(timespec_to_ns(&ts), (__u64 *)&ev->timestamp_ns);
 
        memcpy(&msg->id, &cn_proc_event_id, sizeof(msg->id));
        msg->ack = 0; /* not used */
@@ -146,7 +147,7 @@ void proc_exit_connector(struct task_struct *task)
        ev = (struct proc_event*)msg->data;
        get_seq(&msg->seq, &ev->cpu);
        ktime_get_ts(&ts); /* get high res monotonic timestamp */
-       ev->timestamp_ns = timespec_to_ns(&ts);
+       put_unaligned(timespec_to_ns(&ts), (__u64 *)&ev->timestamp_ns);
        ev->what = PROC_EVENT_EXIT;
        ev->event_data.exit.process_pid = task->pid;
        ev->event_data.exit.process_tgid = task->tgid;
@@ -181,7 +182,7 @@ static void cn_proc_ack(int err, int rcvd_seq, int rcvd_ack)
        ev = (struct proc_event*)msg->data;
        msg->seq = rcvd_seq;
        ktime_get_ts(&ts); /* get high res monotonic timestamp */
-       ev->timestamp_ns = timespec_to_ns(&ts);
+       put_unaligned(timespec_to_ns(&ts), (__u64 *)&ev->timestamp_ns);
        ev->cpu = -1;
        ev->what = PROC_EVENT_NONE;
        ev->event_data.ack.err = err;