From: Martin Schwidefsky <schwidefsky@de.ibm.com>
Date: Thu, 30 Oct 2014 09:55:37 +0000 (+0100)
Subject: s390/mm: use correct unlock function in gmap_ipte_notify
X-Git-Tag: firefly_0821_release~176^2~2716^2~33
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=a697e051160390065393e2926d9d080077239e9e;p=firefly-linux-kernel-4.4.55.git

s390/mm: use correct unlock function in gmap_ipte_notify

The page table lock is acquired with a call to get_locked_pte,
replace the plain spin_unlock with the correct unlock function
pte_unmap_unlock.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
index 9c8a6dd8a49c..71c7eff2c89f 100644
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c
@@ -762,7 +762,7 @@ int gmap_ipte_notify(struct gmap *gmap, unsigned long gaddr, unsigned long len)
 			gaddr += PAGE_SIZE;
 			len -= PAGE_SIZE;
 		}
-		spin_unlock(ptl);
+		pte_unmap_unlock(ptep, ptl);
 	}
 	up_read(&gmap->mm->mmap_sem);
 	return rc;