firmware_map: make firmware_map_add_early() argument consistent with firmware_map_add_hotplug()
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". Even if applying the patch,
/sys/firmware/memmap/X/end file content does not change.
[akpm@linux-foundation.org: clarify comments]
Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Reviewed-by: Dave Hansen <dave@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/firmware/memmap.c b/drivers/firmware/memmap.c
index adc0710..c1cdc92 100644
--- a/drivers/firmware/memmap.c
+++ b/drivers/firmware/memmap.c
@@ -98,7 +98,7 @@
/**
* firmware_map_add_entry() - Does the real work to add a firmware memmap entry.
* @start: Start of the memory range.
- * @end: End of the memory range (inclusive).
+ * @end: End of the memory range (exclusive).
* @type: Type of the memory range.
* @entry: Pre-allocated (either kmalloc() or bootmem allocator), uninitialised
* entry.
@@ -113,7 +113,7 @@
BUG_ON(start > end);
entry->start = start;
- entry->end = end;
+ entry->end = end - 1;
entry->type = type;
INIT_LIST_HEAD(&entry->list);
kobject_init(&entry->kobj, &memmap_ktype);
@@ -148,7 +148,7 @@
* firmware_map_add_hotplug() - Adds a firmware mapping entry when we do
* memory hotplug.
* @start: Start of the memory range.
- * @end: End of the memory range (inclusive).
+ * @end: End of the memory range (exclusive)
* @type: Type of the memory range.
*
* Adds a firmware mapping entry. This function is for memory hotplug, it is
@@ -175,7 +175,7 @@
/**
* firmware_map_add_early() - Adds a firmware mapping entry.
* @start: Start of the memory range.
- * @end: End of the memory range (inclusive).
+ * @end: End of the memory range.
* @type: Type of the memory range.
*
* Adds a firmware mapping entry. This function uses the bootmem allocator