From: Yasuaki Ishimatsu <isimatu.yasu...@jp.fujitsu.com> 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. CC: Thomas Gleixner <t...@linutronix.de> CC: Ingo Molnar <mi...@kernel.org> CC: H. Peter Anvin <h...@zytor.com> CC: Tejun Heo <t...@kernel.org> CC: Andrew Morton <a...@linux-foundation.org> Reviewed-by: Dave Hansen <d...@linux.vnet.ibm.com> Signed-off-by: Yasuaki Ishimatsu <isimatu.yasu...@jp.fujitsu.com> --- arch/x86/kernel/e820.c | 2 +- drivers/firmware/memmap.c | 8 ++++---- 2 files changed, 5 insertions(+), 5 deletions(-) Index: linux-3.5-rc6/arch/x86/kernel/e820.c =================================================================== --- linux-3.5-rc6.orig/arch/x86/kernel/e820.c 2012-07-18 17:19:38.391365260 +0900 +++ linux-3.5-rc6/arch/x86/kernel/e820.c 2012-07-18 17:19:43.616300222 +0900 @@ -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)); } } Index: linux-3.5-rc6/drivers/firmware/memmap.c =================================================================== --- linux-3.5-rc6.orig/drivers/firmware/memmap.c 2012-07-18 17:19:38.388365299 +0900 +++ linux-3.5-rc6/drivers/firmware/memmap.c 2012-07-18 18:30:47.608390251 +0900 @@ -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. * @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 st 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_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. * @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(u /** * 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 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev