From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 13 Feb 2016 16:16:37 +0000 (-0500)
Subject: orangefs_bufmap_..._query(): don't bother with refcounts
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=178041848a6e7072cc6ebc1c6c7763e33f564722;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

orangefs_bufmap_..._query(): don't bother with refcounts

... just hold the spinlock while fetching the field in question.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
---

diff --git a/fs/orangefs/orangefs-bufmap.c b/fs/orangefs/orangefs-bufmap.c
index 1819dee58433..cd484665bf72 100644
--- a/fs/orangefs/orangefs-bufmap.c
+++ b/fs/orangefs/orangefs-bufmap.c
@@ -91,11 +91,11 @@ int orangefs_bufmap_size_query(void)
 {
 	struct orangefs_bufmap *bufmap;
 	int size = 0;
-	bufmap = orangefs_bufmap_ref();
-	if (bufmap) {
+	spin_lock(&orangefs_bufmap_lock);
+	bufmap = __orangefs_bufmap;
+	if (bufmap)
 		size = bufmap->desc_size;
-		orangefs_bufmap_unref(bufmap);
-	}
+	spin_unlock(&orangefs_bufmap_lock);
 	return size;
 }
 
@@ -103,11 +103,11 @@ int orangefs_bufmap_shift_query(void)
 {
 	struct orangefs_bufmap *bufmap;
 	int shift = 0;
-	bufmap = orangefs_bufmap_ref();
-	if (bufmap) {
+	spin_lock(&orangefs_bufmap_lock);
+	bufmap = __orangefs_bufmap;
+	if (bufmap)
 		shift = bufmap->desc_shift;
-		orangefs_bufmap_unref(bufmap);
-	}
+	spin_unlock(&orangefs_bufmap_lock);
 	return shift;
 }