patches/fscache_compile_fix.patch

From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Subject: fs/fscache: done merge spin_lock() in while()

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
--- a/fs/fscache/page.c
+++ b/fs/fscache/page.c
@@ -796,11 +796,13 @@ void fscache_invalidate_writes(struct fs
 
 	_enter("");
 
-	while (spin_lock(&cookie->stores_lock),
-	       n = radix_tree_gang_lookup_tag(&cookie->stores, results, 0,
-					      ARRAY_SIZE(results),
-					      FSCACHE_COOKIE_PENDING_TAG),
-	       n > 0) {
+	do  {
+		spin_lock(&cookie->stores_lock);
+		n = radix_tree_gang_lookup_tag(&cookie->stores, results, 0,
+				ARRAY_SIZE(results),
+				FSCACHE_COOKIE_PENDING_TAG);
+	       if (n == 0)
+		       break;
 		for (i = n - 1; i >= 0; i--) {
 			page = results[i];
 			radix_tree_delete(&cookie->stores, page->index);
@@ -810,7 +812,7 @@ void fscache_invalidate_writes(struct fs
 
 		for (i = n - 1; i >= 0; i--)
 			page_cache_release(results[i]);
-	}
+	} while (1);
 
 	spin_unlock(&cookie->stores_lock);
 	_leave("");