From: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Date: Fri, 30 Apr 2010 13:45:36 +0000 (-0700)
Subject: mce: convert to rcu_dereference_index_check()
X-Git-Tag: firefly_0821_release~9833^2~1268^2~2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ec8c27e04f89a7575ca2c4facb99152e03d6a99c;p=firefly-linux-kernel-4.4.55.git

mce: convert to rcu_dereference_index_check()

The mce processing applies rcu_dereference_check() to integers used as
array indices.  This patch therefore moves mce to the new RCU API
rcu_dereference_index_check() that avoids the sparse processing that
would otherwise result in compiler errors.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
---

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 18cc42562250..0e78657e29c5 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -51,7 +51,7 @@
 static DEFINE_MUTEX(mce_read_mutex);
 
 #define rcu_dereference_check_mce(p) \
-	rcu_dereference_check((p), \
+	rcu_dereference_index_check((p), \
 			      rcu_read_lock_sched_held() || \
 			      lockdep_is_held(&mce_read_mutex))