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authorYasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>2012-07-30 14:41:13 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-07-30 17:25:17 -0700
commit4ed940d4c34c21a1a356969a923f2815d608e0bf (patch)
tree47c0f4e61acf7ee814d224bf5965e5b1c77f99d1
parent4b0681487bf72fdb86b42c93b7d8a607e5a426b1 (diff)
downloadlinux-linaro-stable-4ed940d4c34c21a1a356969a923f2815d608e0bf.tar.gz
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>
-rw-r--r--arch/x86/kernel/e820.c2
-rw-r--r--drivers/firmware/memmap.c8
2 files changed, 5 insertions, 5 deletions
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 41857970517f..ed858e9e9a74 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -944,7 +944,7 @@ void __init e820_reserve_resources(void)
for (i = 0; i < e820_saved.nr_map; i++) {
struct e820entry *entry = &e820_saved.map[i];
firmware_map_add_early(entry->addr,
- entry->addr + entry->size - 1,
+ entry->addr + entry->size,
e820_type_to_string(entry->type));
}
}
diff --git a/drivers/firmware/memmap.c b/drivers/firmware/memmap.c
index adc07102a20d..c1cdc9236666 100644
--- a/drivers/firmware/memmap.c
+++ b/drivers/firmware/memmap.c
@@ -98,7 +98,7 @@ static LIST_HEAD(map_entries);
/**
* 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 @@ static int firmware_map_add_entry(u64 start, u64 end,
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 @@ static int add_sysfs_fw_map_entry(struct firmware_map_entry *entry)
* 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 @@ int __meminit firmware_map_add_hotplug(u64 start, u64 end, const char *type)
/**
* 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