From mboxrd@z Thu Jan  1 00:00:00 1970
From: Olaf Hering <olaf@aepfle.de>
Subject: [PATCH 4 of 7] xenpaging: remove return values from
 functions that can not fail
Date: Thu, 31 Mar 2011 19:36:21 +0200
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# HG changeset patch
# User Olaf Hering <olaf@aepfle.de>
# Date 1301591599 -7200
# Node ID 8825c216096a80e5590ce075da273eeb06c1e7aa
# Parent  cd35892de8ff2388aa46e3768393f217a3c63521
xenpaging: remove return values from functions that can not fail

get_request() and put_response() can not fail, remove return value
and update calling functions.

Signed-off-by: Olaf Hering <olaf@aepfle.de>

diff -r cd35892de8ff -r 8825c216096a tools/xenpaging/xenpaging.c
--- a/tools/xenpaging/xenpaging.c	Thu Mar 31 19:12:50 2011 +0200
+++ b/tools/xenpaging/xenpaging.c	Thu Mar 31 19:13:19 2011 +0200
@@ -297,7 +297,7 @@
     return -1;
 }
 
-static int get_request(mem_event_t *mem_event, mem_event_request_t *req)
+static void get_request(mem_event_t *mem_event, mem_event_request_t *req)
 {
     mem_event_back_ring_t *back_ring;
     RING_IDX req_cons;
@@ -316,11 +316,9 @@
     back_ring->sring->req_event = req_cons + 1;
 
     mem_event_ring_unlock(mem_event);
-
-    return 0;
 }
 
-static int put_response(mem_event_t *mem_event, mem_event_response_t *rsp)
+static void put_response(mem_event_t *mem_event, mem_event_response_t *rsp)
 {
     mem_event_back_ring_t *back_ring;
     RING_IDX rsp_prod;
@@ -339,8 +337,6 @@
     RING_PUSH_RESPONSES(back_ring);
 
     mem_event_ring_unlock(mem_event);
-
-    return 0;
 }
 
 static int xenpaging_evict_page(xenpaging_t *paging,
@@ -400,9 +396,7 @@
     int ret;
 
     /* Put the page info on the ring */
-    ret = put_response(&paging->mem_event, rsp);
-    if ( ret != 0 )
-        goto out;
+    put_response(&paging->mem_event, rsp);
 
     /* Notify policy of page being paged in */
     if ( notify_policy )
@@ -612,12 +606,7 @@
 
         while ( RING_HAS_UNCONSUMED_REQUESTS(&paging->mem_event.back_ring) )
         {
-            rc = get_request(&paging->mem_event, &req);
-            if ( rc != 0 )
-            {
-                ERROR("Error getting request");
-                goto out;
-            }
+            get_request(&paging->mem_event, &req);
 
             /* Check if the page has already been paged in */
             if ( test_and_clear_bit(req.gfn, paging->bitmap) )