diff mbox series

[XEN,for-4.19,2/2] xen/iommu: use LOWEST_BIT to wrap a violation of Rule 10.1

Message ID 26399294316ff7f468c05d7e8a8433227afb3177.1697125949.git.nicola.vetrini@bugseng.com (mailing list archive)
State New, archived
Headers show
Series use the macro LOWEST_BIT where appropriate | expand

Commit Message

Nicola Vetrini Oct. 12, 2023, 3:57 p.m. UTC 
No functional change.

Signed-off-by: Nicola Vetrini <nicola.vetrini@bugseng.com>
---
 xen/drivers/passthrough/iommu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Stefano Stabellini Oct. 12, 2023, 11:49 p.m. UTC | #1 
On Thu, 12 Oct 2023, Nicola Vetrini wrote:
> No functional change.
> 
> Signed-off-by: Nicola Vetrini <nicola.vetrini@bugseng.com>

Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
diff mbox series

Patch

diff --git a/xen/drivers/passthrough/iommu.c b/xen/drivers/passthrough/iommu.c
index f9a9f53dbd44..558700788d4a 100644
--- a/xen/drivers/passthrough/iommu.c
+++ b/xen/drivers/passthrough/iommu.c
@@ -560,7 +560,7 @@  int __init iommu_setup(void)
         rc = iommu_hardware_setup();
         if ( !rc )
             ops = iommu_get_ops();
-        if ( ops && (ops->page_sizes & -ops->page_sizes) != PAGE_SIZE )
+        if ( ops && (LOWEST_BIT(ops->page_sizes)) != PAGE_SIZE )
         {
             printk(XENLOG_ERR "IOMMU: page size mask %lx unsupported\n",
                    ops->page_sizes);