XArray: Correct xa_store_range

The explicit '64' should have been BITS_PER_LONG, but while looking at this code I realised I meant to use __ffs(), not ilog2(). Signed-off-by: Matthew Wilcox <[email protected]>
ambv · Nov 16, 2018 · 44a4a66 · 44a4a66
1 parent 804dfaf
commit 44a4a66
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/lib/xarray.c b/lib/xarray.c
@@ -1565,8 +1565,9 @@ void *xa_store_range(struct xarray *xa, unsigned long first,
 	do {
 		xas_lock(&xas);
 		if (entry) {
-			unsigned int order = (last == ~0UL) ? 64 :
-						ilog2(last + 1);
+			unsigned int order = BITS_PER_LONG;
+			if (last + 1)
+				order = __ffs(last + 1);
 			xas_set_order(&xas, last, order);
 			xas_create(&xas);
 			if (xas_error(&xas))