[Xen-devel] [PATCH v4 10/14] libxc/save: remove bitmap param from send_some_pages

[Yang Hongyang <yanghy@xxxxxxxxxxxxxx>]

In last patch we added dirty bitmap to the save context,
we no longer need to pass this param to send_some_pages.
We can get dirty bitmap from the save context.
'entries' should stay as it is a useful sanity check.

Signed-off-by: Yang Hongyang <yanghy@xxxxxxxxxxxxxx>
CC: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
CC: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
CC: Wei Liu <wei.liu2@xxxxxxxxxx>
CC: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 tools/libxc/xc_sr_save.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/tools/libxc/xc_sr_save.c b/tools/libxc/xc_sr_save.c
index 0953c35..af2c859 100644
--- a/tools/libxc/xc_sr_save.c
+++ b/tools/libxc/xc_sr_save.c
@@ -374,23 +374,24 @@ static int send_all_pages(struct xc_sr_context *ctx)
 }
 
 /*
- * Send a subset of pages in the guests p2m, according to the provided bitmap.
+ * Send a subset of pages in the guests p2m, according to the dirty bitmap.
  * Used for each subsequent iteration of the live migration loop.
  *
  * Bitmap is bounded by p2m_size.
  */
 static int send_some_pages(struct xc_sr_context *ctx,
-                           unsigned long *bitmap,
                            unsigned long entries)
 {
     xc_interface *xch = ctx->xch;
     xen_pfn_t p;
     unsigned long written;
     int rc;
+    DECLARE_HYPERCALL_BUFFER_SHADOW(unsigned long, dirty_bitmap,
+                                    (&ctx->save.dirty_bitmap_hbuf));
 
     for ( p = 0, written = 0; p < ctx->save.p2m_size; ++p )
     {
-        if ( !test_bit(p, bitmap) )
+        if ( !test_bit(p, dirty_bitmap) )
             continue;
 
         rc = add_to_batch(ctx, p);
@@ -515,7 +516,7 @@ static int send_domain_memory_live(struct xc_sr_context 
*ctx)
         if ( rc )
             goto out;
 
-        rc = send_some_pages(ctx, dirty_bitmap, stats.dirty_count);
+        rc = send_some_pages(ctx, stats.dirty_count);
         if ( rc )
             goto out;
     }
@@ -540,8 +541,7 @@ static int send_domain_memory_live(struct xc_sr_context 
*ctx)
 
     bitmap_or(dirty_bitmap, ctx->save.deferred_pages, ctx->save.p2m_size);
 
-    rc = send_some_pages(ctx, dirty_bitmap,
-                         stats.dirty_count + ctx->save.nr_deferred_pages);
+    rc = send_some_pages(ctx, stats.dirty_count + ctx->save.nr_deferred_pages);
     if ( rc )
         goto out;
 
-- 
1.9.1


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