+ drivers-dax-avoiding-potential-deadlock.patch added to -mm tree

+ drivers-dax-avoiding-potential-deadlock.patch added to -mm tree

[akpm]

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@gmail.com>
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@gmail.com
Signed-off-by: Pushkar Jambhlekar <pushkar.iit@gmail.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 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@gmail.com are

drivers-dax-avoiding-potential-deadlock.patch
drivers-dax-changing-rc-value.patch
mm-include-linux-migrateh-fixing-checkpatch-warning-regarding-function-definition.patch