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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2006-08-05 12:14:59 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-08-06 08:57:48 -0700
commit0f04ab5efbca73ab366a156d96b073d2da35b158 (patch)
tree53da6790d43c370c56699e093e7c9ba6ad310ea6
parent6f712711dbd180aa3777efe5ae3b9b0e915b9471 (diff)
downloadlinux-0f04ab5efbca73ab366a156d96b073d2da35b158.tar.bz2
[PATCH] memory hotadd fixes: change find_next_system_ram's return value manner
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> Cc: Keith Mannthey <kmannth@gmail.com> Cc: Yasunori Goto <y-goto@jp.fujitsu.com> Cc: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--kernel/resource.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/resource.c b/kernel/resource.c
index 0dd3a857579e..63e879379dbd 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -261,8 +261,10 @@ int find_next_system_ram(struct resource *res)
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