The patch titled
Remove workaround for unimmunized rcu_dereference from mce_log()
has been removed from the -mm tree. Its filename was
remove-workaround-for-unimmunized-rcu_dereference-from-mce_log.patch
This patch was dropped because it had testing failures
------------------------------------------------------
Subject: Remove workaround for unimmunized rcu_dereference from mce_log()
From: "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>
Remove the rmb() from mce_log(), since the immunized version of
rcu_dereference() makes it unnecessary.
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86_64/kernel/mce.c | 3 ---
1 file changed, 3 deletions(-)
diff -puN arch/x86_64/kernel/mce.c~remove-workaround-for-unimmunized-rcu_dereference-from-mce_log arch/x86_64/kernel/mce.c
--- a/arch/x86_64/kernel/mce.c~remove-workaround-for-unimmunized-rcu_dereference-from-mce_log
+++ a/arch/x86_64/kernel/mce.c
@@ -67,9 +67,6 @@ void mce_log(struct mce *mce)
wmb();
for (;;) {
entry = rcu_dereference(mcelog.next);
- /* The rmb forces the compiler to reload next in each
- iteration */
- rmb();
for (;;) {
/* When the buffer fills up discard new entries. Assume
that the earlier errors are the more interesting. */
_
Patches currently in -mm which might be from paulmck@xxxxxxxxxxxxxxxxxx are
origin.patch
remove-workaround-for-unimmunized-rcu_dereference-from-mce_log.patch
-
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