[xen staging] libs/guest: Avoids using 2 indexes in process_page_data()

[patchbot@xxxxxxx]

commit 42ef7f610653d743bf8c04f9bbe26239148ac84f
Author:     Frediano Ziglio <frediano.ziglio@xxxxxxxxxx>
AuthorDate: Fri Jun 19 14:04:52 2026 +0100
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Wed Jul 8 15:35:45 2026 +0100

    libs/guest: Avoids using 2 indexes in process_page_data()
    
    Simplify code, after the first scan of the various arrays we don't need to
    keep original types and PFNs but only the ones having data.
    
    Signed-off-by: Frediano Ziglio <frediano.ziglio@xxxxxxxxxx>
    Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Acked-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
---
 tools/libs/guest/xg_sr_restore.c | 25 ++++++++++++-------------
 1 file changed, 12 insertions(+), 13 deletions(-)

diff --git a/tools/libs/guest/xg_sr_restore.c b/tools/libs/guest/xg_sr_restore.c
index e148fc594a..458eaa5992 100644
--- a/tools/libs/guest/xg_sr_restore.c
+++ b/tools/libs/guest/xg_sr_restore.c
@@ -260,9 +260,7 @@ static int process_page_data(struct xc_sr_context *ctx, 
unsigned int count,
     int *map_errs = malloc(count * sizeof(*map_errs));
     int rc;
     void *mapping = NULL, *guest_page = NULL;
-    unsigned int i, /* i indexes the pfns from the record. */
-        j,          /* j indexes the subset of pfns we decide to map. */
-        nr_pages = 0;
+    unsigned int nr_pages = 0;
 
     if ( !mfns || !map_errs )
     {
@@ -279,12 +277,17 @@ static int process_page_data(struct xc_sr_context *ctx, 
unsigned int count,
         goto err;
     }
 
-    for ( i = 0; i < count; ++i )
+    for ( unsigned int i = 0; i < count; ++i )
     {
         ctx->restore.ops.set_page_type(ctx, pfns[i], types[i]);
 
-        if ( page_type_has_stream_data(types[i]) )
-            mfns[nr_pages++] = ctx->restore.ops.pfn_to_gfn(ctx, pfns[i]);
+        if ( !page_type_has_stream_data(types[i]) )
+            continue;
+
+        mfns[nr_pages]  = ctx->restore.ops.pfn_to_gfn(ctx, pfns[i]);
+        pfns[nr_pages]  = pfns[i];
+        types[nr_pages] = types[i];
+        nr_pages++;
     }
 
     /* Nothing to do? */
@@ -302,16 +305,13 @@ static int process_page_data(struct xc_sr_context *ctx, 
unsigned int count,
         goto err;
     }
 
-    for ( i = 0, j = 0; i < count; ++i )
+    for ( unsigned int i = 0; i < nr_pages; ++i )
     {
-        if ( !page_type_has_stream_data(types[i]) )
-            continue;
-
-        if ( map_errs[j] )
+        if ( map_errs[i] )
         {
             rc = -1;
             ERROR("Mapping pfn %#"PRIpfn" (mfn %#"PRIpfn", type %#"PRIx32") 
failed with %d",
-                  pfns[i], mfns[j], types[i], map_errs[j]);
+                  pfns[i], mfns[i], types[i], map_errs[i]);
             goto err;
         }
 
@@ -337,7 +337,6 @@ static int process_page_data(struct xc_sr_context *ctx, 
unsigned int count,
             memcpy(guest_page, page_data, PAGE_SIZE);
         }
 
-        ++j;
         guest_page += PAGE_SIZE;
         page_data += PAGE_SIZE;
     }
--
generated by git-patchbot for /home/xen/git/xen.git#staging