[PATCH rcu 1/4] locktorture: Increase Hamming distance between call_rcu_chain and rcu_call_chains

From: Neeraj Upadhyay (AMD)
Date: Tue Dec 12 2023 - 12:34:29 EST


From: "Paul E. McKenney" <paulmck@xxxxxxxxxx>

One letter difference is really not enough, so this commit changes
call_rcu_chain to call_rcu_chain_list.

Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
Signed-off-by: Neeraj Upadhyay (AMD) <neeraj.iitr10@xxxxxxxxx>
---
kernel/locking/locktorture.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/kernel/locking/locktorture.c b/kernel/locking/locktorture.c
index 69d3cd2cfc3b..415d81e6ce70 100644
--- a/kernel/locking/locktorture.c
+++ b/kernel/locking/locktorture.c
@@ -124,7 +124,7 @@ struct call_rcu_chain {
struct rcu_head crc_rh;
bool crc_stop;
};
-struct call_rcu_chain *call_rcu_chain;
+struct call_rcu_chain *call_rcu_chain_list;

/* Forward reference. */
static void lock_torture_cleanup(void);
@@ -1074,12 +1074,12 @@ static int call_rcu_chain_init(void)

if (call_rcu_chains <= 0)
return 0;
- call_rcu_chain = kcalloc(call_rcu_chains, sizeof(*call_rcu_chain), GFP_KERNEL);
- if (!call_rcu_chain)
+ call_rcu_chain_list = kcalloc(call_rcu_chains, sizeof(*call_rcu_chain_list), GFP_KERNEL);
+ if (!call_rcu_chain_list)
return -ENOMEM;
for (i = 0; i < call_rcu_chains; i++) {
- call_rcu_chain[i].crc_stop = false;
- call_rcu(&call_rcu_chain[i].crc_rh, call_rcu_chain_cb);
+ call_rcu_chain_list[i].crc_stop = false;
+ call_rcu(&call_rcu_chain_list[i].crc_rh, call_rcu_chain_cb);
}
return 0;
}
@@ -1089,13 +1089,13 @@ static void call_rcu_chain_cleanup(void)
{
int i;

- if (!call_rcu_chain)
+ if (!call_rcu_chain_list)
return;
for (i = 0; i < call_rcu_chains; i++)
- smp_store_release(&call_rcu_chain[i].crc_stop, true);
+ smp_store_release(&call_rcu_chain_list[i].crc_stop, true);
rcu_barrier();
- kfree(call_rcu_chain);
- call_rcu_chain = NULL;
+ kfree(call_rcu_chain_list);
+ call_rcu_chain_list = NULL;
}

static void lock_torture_cleanup(void)
--
2.40.1