[PATCH] memory hotadd fixes [2/5] change find_next_system_ram's return value manner

[KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>]

find_next_system_ram() returns valid memory range which meets requested
area, only used by memory-hot-add.
This function always rewrite requested resource even if returned area is
not fully fit in requested one. And sometimes the returnd resource is larger
than requested area. This annoyes the caller.
This patch changes the returned value to fit in requested area.

Signed-Off-By: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>

 kernel/resource.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

Index: linux-2.6.18-rc3/kernel/resource.c
===================================================================
--- linux-2.6.18-rc3.orig/kernel/resource.c	2006-08-01 16:11:56.000000000 +0900
+++ linux-2.6.18-rc3/kernel/resource.c	2006-08-01 16:38:45.000000000 +0900
@@ -261,8 +261,10 @@
 	if (!p)
 		return -1;
 	/* copy data */
-	res->start = p->start;
-	res->end = p->end;
+	if (res->start < p->start)
+		res->start = p->start;
+	if (res->end > p->end)
+		res->end = p->end;
 	return 0;
 }
 #endif

-
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