migration/ram: Stop passing QEMUFile around in save_zero_page

We don't need the QEMUFile when we're already passing the
PageSearchStatus.

Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-ID: <20231011184604.32364-5-farosas@suse.de>

migration/ram.c

@@ -1147,10 +1147,11 @@ void ram_release_page(const char *rbname, uint64_t offset)
  * @block: block that contains the page we want to send
  * @offset: offset inside the block for the page
  */
-static int save_zero_page_to_file(PageSearchStatus *pss, QEMUFile *file,
-                                  RAMBlock *block, ram_addr_t offset)
+static int save_zero_page_to_file(PageSearchStatus *pss, RAMBlock *block,
+                                  ram_addr_t offset)
 {
     uint8_t *p = block->host + offset;
+    QEMUFile *file = pss->pss_channel;
     int len = 0;
 
     if (buffer_is_zero(p, TARGET_PAGE_SIZE)) {
@@ -1171,10 +1172,10 @@ static int save_zero_page_to_file(PageSearchStatus *pss, QEMUFile *file,
  * @block: block that contains the page we want to send
  * @offset: offset inside the block for the page
  */
-static int save_zero_page(PageSearchStatus *pss, QEMUFile *f, RAMBlock *block,
+static int save_zero_page(PageSearchStatus *pss, RAMBlock *block,
                           ram_addr_t offset)
 {
-    int len = save_zero_page_to_file(pss, f, block, offset);
+    int len = save_zero_page_to_file(pss, block, offset);
 
     if (len) {
         stat64_add(&mig_stats.zero_pages, 1);
@@ -2138,7 +2139,7 @@ static int ram_save_target_page_legacy(RAMState *rs, PageSearchStatus *pss)
         return 1;
     }
 
-    res = save_zero_page(pss, pss->pss_channel, block, offset);
+    res = save_zero_page(pss, block, offset);
     if (res > 0) {
         /* Must let xbzrle know, otherwise a previous (now 0'd) cached
          * page would be stale