[Xen-devel] [PATCH 13 of 22] xenpaging: remove return values from functions that can not fail

[Olaf Hering <olaf@xxxxxxxxx>]

# HG changeset patch
# User Olaf Hering <olaf@xxxxxxxxx>
# Date 1307695638 -7200
# Node ID f26f07e19318b112b58ee370c16bee8bf5605d3f
# Parent  ea8f764e530d66463ceb9e97af9756a2a8f96c7c
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@xxxxxxxxx>

diff -r ea8f764e530d -r f26f07e19318 tools/xenpaging/xenpaging.c
--- a/tools/xenpaging/xenpaging.c       Fri Jun 10 10:47:16 2011 +0200
+++ b/tools/xenpaging/xenpaging.c       Fri Jun 10 10:47:18 2011 +0200
@@ -342,7 +342,7 @@ static int xenpaging_teardown(xenpaging_
     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;
@@ -357,11 +357,9 @@ static int get_request(mem_event_t *mem_
     /* Update ring */
     back_ring->req_cons = req_cons;
     back_ring->sring->req_event = req_cons + 1;
-
-    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;
@@ -376,8 +374,6 @@ static int put_response(mem_event_t *mem
     /* Update ring */
     back_ring->rsp_prod_pvt = rsp_prod;
     RING_PUSH_RESPONSES(back_ring);
-
-    return 0;
 }
 
 static int xenpaging_evict_page(xenpaging_t *paging,
@@ -437,9 +433,7 @@ static int xenpaging_resume_page(xenpagi
     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 )
@@ -649,12 +643,7 @@ int main(int argc, char *argv[])
 
         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) )

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