The patch titled
Subject: drivers/dax/dax.c: avoid potential deadlock
has been added to the -mm tree. Its filename is
drivers-dax-avoiding-potential-deadlock.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/drivers-dax-avoiding-potential-deadlock.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/drivers-dax-avoiding-potential-deadlock.patch
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------------------------------------------------------
From: Pushkar Jambhlekar <pushkar.iit@xxxxxxxxx>
Subject: drivers/dax/dax.c: avoid potential deadlock
dax_dev_huge_fault() returns without releasing rcu_read_lock(). Make code
change to avoid this situation
Link: http://lkml.kernel.org/r/1491888405-7772-1-git-send-email-pushkar.iit@xxxxxxxxx
Signed-off-by: Pushkar Jambhlekar <pushkar.iit@xxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Dave Jiang <dave.jiang@xxxxxxxxx>
Cc: Johannes Thumshirn <jthumshirn@xxxxxxx>
Cc: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/dax/dax.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN drivers/dax/dax.c~drivers-dax-avoiding-potential-deadlock drivers/dax/dax.c
--- a/drivers/dax/dax.c~drivers-dax-avoiding-potential-deadlock
+++ a/drivers/dax/dax.c
@@ -590,7 +590,7 @@ static int dax_dev_huge_fault(struct vm_
rc = __dax_dev_pud_fault(dax_dev, vmf);
break;
default:
- return VM_FAULT_FALLBACK;
+ rc = VM_FAULT_FALLBACK;
}
rcu_read_unlock();
_
Patches currently in -mm which might be from pushkar.iit@xxxxxxxxx are
drivers-dax-avoiding-potential-deadlock.patch
drivers-dax-changing-rc-value.patch
mm-include-linux-migrateh-fixing-checkpatch-warning-regarding-function-definition.patch
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