[RFC PATCH v2 3/13] unify argument of firmware_map_add_early/hotplug

Yasuaki Ishimatsu
2012-07-03T05:55:41Z

There are two ways to create /sys/firmware/memmap/X sysfs:

- firmware_map_add_early
When the system starts, it is calledd from e820_reserve_resources()
- firmware_map_add_hotplug
When the memory is hot plugged, it is called from add_memory()

But these functions are called without unifying value of end argument as below:

- end argument of firmware_map_add_early() : start + size - 1
- end argument of firmware_map_add_hogplug() : start + size

The patch unifies them to "start + size - 1".

CC: David Rientjes <rientjes@google.com>
CC: Jiang Liu <liuj97@gmail.com>
CC: Len Brown <len.brown@intel.com>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Paul Mackerras <paulus@samba.org>
CC: Christoph Lameter <cl@linux.com>
Cc: Minchan Kim <minchan.kim@gmail.com>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>

---
mm/memory_hotplug.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-3.5-rc4/mm/memory_hotplug.c
===================================================================
--- linux-3.5-rc4.orig/mm/memory_hotplug.c 2012-07-03 14:21:58.332264022 +0900
+++ linux-3.5-rc4/mm/memory_hotplug.c 2012-07-03 14:22:00.190240794 +0900
@@ -642,7 +642,7 @@ int __ref add_memory(int nid, u64 start,
}

/* create new memmap entry */
- firmware_map_add_hotplug(start, start + size, "System RAM");
+ firmware_map_add_hotplug(start, start + size - 1, "System RAM");

goto out;