The patch titled
sgi-xpc: ensure flags are updated before bte_copy
has been added to the -mm tree. Its filename is
sgi-xpc-ensure-flags-are-updated-before-bte_copy.patch
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------------------------------------------------------
Subject: sgi-xpc: ensure flags are updated before bte_copy
From: Robin Holt <holt@xxxxxxx>
The clearing of the msg->flags needs a barrier between it and the notify
of the channel threads that the messages are cleaned and ready for use.
Signed-off-by: Robin Holt <holt@xxxxxxx>
Signed-off-by: Dean Nelson <dcn@xxxxxxx>
Cc: <stable@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/misc/sgi-xp/xpc_sn2.c | 1 +
1 file changed, 1 insertion(+)
diff -puN drivers/misc/sgi-xp/xpc_sn2.c~sgi-xpc-ensure-flags-are-updated-before-bte_copy drivers/misc/sgi-xp/xpc_sn2.c
--- a/drivers/misc/sgi-xp/xpc_sn2.c~sgi-xpc-ensure-flags-are-updated-before-bte_copy
+++ a/drivers/misc/sgi-xp/xpc_sn2.c
@@ -1836,6 +1836,7 @@ xpc_process_msg_chctl_flags_sn2(struct x
*/
xpc_clear_remote_msgqueue_flags_sn2(ch);
+ wmb(); /* ensure flags have been cleared before bte_copy */
ch_sn2->w_remote_GP.put = ch_sn2->remote_GP.put;
dev_dbg(xpc_chan, "w_remote_GP.put changed to %ld, partid=%d, "
_
Patches currently in -mm which might be from holt@xxxxxxx are
origin.patch
sgi-xpc-ensure-flags-are-updated-before-bte_copy.patch
sgi-xpc-remove-null-pointer-dereference.patch
sgi-xpc-fixup-stale-dbug_on-statements.patch
factor-out-ifdefs-from-kernel-spinlockc-to-lock_contended_flags.patch
allow-rwlocks-to-re-enable-interrupts.patch
ia64-implement-interrupt-enabling-rwlocks.patch
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