From 80d72670add5f98eb0bde1b2f7f2e3e94119df49 Mon Sep 17 00:00:00 2001
From: Nicola Vetrini <nicola.vetrini@bugseng.com>
Date: Fri, 24 Nov 2023 09:02:34 +0100
Subject: [PATCH] xen/vmap: use ISOLATE_LSB to wrap a violation of Rule 10.1

No functional change.

Signed-off-by: Nicola Vetrini <nicola.vetrini@bugseng.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
---
 xen/common/vmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/common/vmap.c b/xen/common/vmap.c
index 4fd6b3067e..330e2ba897 100644
--- a/xen/common/vmap.c
+++ b/xen/common/vmap.c
@@ -53,7 +53,7 @@ static void *vm_alloc(unsigned int nr, unsigned int align,
     if ( !align )
         align = 1;
     else if ( align & (align - 1) )
-        align &= -align;
+        align = ISOLATE_LSB(align);
 
     ASSERT((t >= VMAP_DEFAULT) && (t < VMAP_REGION_NR));
     if ( !vm_base[t] )