[PATCH] x86: don't open-code vmap_to_mfn()

From: Jan Beulich <jbeulich@suse.com>
To: "xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>
Cc: "Andrew Cooper" <andrew.cooper3@citrix.com>,
	"Wei Liu" <wl@xen.org>, "Roger Pau Monné" <roger.pau@citrix.com>
Subject: [PATCH] x86: don't open-code vmap_to_mfn()
Date: Mon, 26 Oct 2020 16:53:58 +0100	[thread overview]
Message-ID: <d1aeb904-6ae1-2ca8-220a-920f2be5416d@suse.com> (raw)

Signed-off-by: Jan Beulich <jbeulich@suse.com>

--- a/xen/arch/x86/domain_page.c
+++ b/xen/arch/x86/domain_page.c
@@ -333,21 +333,14 @@ void unmap_domain_page_global(const void
 mfn_t domain_page_map_to_mfn(const void *ptr)
 {
     unsigned long va = (unsigned long)ptr;
-    const l1_pgentry_t *pl1e;
 
     if ( va >= DIRECTMAP_VIRT_START )
         return _mfn(virt_to_mfn(ptr));
 
     if ( va >= VMAP_VIRT_START && va < VMAP_VIRT_END )
-    {
-        pl1e = virt_to_xen_l1e(va);
-        BUG_ON(!pl1e);
-    }
-    else
-    {
-        ASSERT(va >= MAPCACHE_VIRT_START && va < MAPCACHE_VIRT_END);
-        pl1e = &__linear_l1_table[l1_linear_offset(va)];
-    }
+        return vmap_to_mfn(va);
 
-    return l1e_get_mfn(*pl1e);
+    ASSERT(va >= MAPCACHE_VIRT_START && va < MAPCACHE_VIRT_END);
+
+    return l1e_get_mfn(__linear_l1_table[l1_linear_offset(va)]);
 }

