Reviewed-by: Tang Chen <tangchen@xxxxxxxxxxxxxx> Thanks. :) On 05/23/2013 06:06 AM, Rafael J. Wysocki wrote:
From: Rafael J. Wysocki<rafael.j.wysocki@xxxxxxxxx> As noted by Tang Chen, the last_online field in struct memory_block introduced by commit 4960e05 (Driver core: Introduce offline/online callbacks for memory blocks) is not really necessary, because online_pages() restores the previous state if passed ONLINE_KEEP as the last argument. Therefore, remove that field along with the code referring to it. References: http://marc.info/?l=linux-kernel&m=136919777305599&w=2 Signed-off-by: Rafael J. Wysocki<rafael.j.wysocki@xxxxxxxxx> --- Hi, The patch is on top (and the commit mentioned in the changelog is present in) the acpi-hotplug branch of the linux-pm.git tree. Thanks, Rafael --- drivers/base/memory.c | 11 ++--------- include/linux/memory.h | 1 - 2 files changed, 2 insertions(+), 10 deletions(-) Index: linux-pm/drivers/base/memory.c =================================================================== --- linux-pm.orig/drivers/base/memory.c +++ linux-pm/drivers/base/memory.c @@ -291,13 +291,7 @@ static int __memory_block_change_state(s mem->state = MEM_GOING_OFFLINE; ret = memory_block_action(mem->start_section_nr, to_state, online_type); - if (ret) { - mem->state = from_state_req; - } else { - mem->state = to_state; - if (to_state == MEM_ONLINE) - mem->last_online = online_type; - } + mem->state = ret ? from_state_req : to_state; return ret; } @@ -310,7 +304,7 @@ static int memory_subsys_online(struct d ret = mem->state == MEM_ONLINE ? 0 : __memory_block_change_state(mem, MEM_ONLINE, MEM_OFFLINE, - mem->last_online); + ONLINE_KEEP); mutex_unlock(&mem->state_mutex); return ret; @@ -618,7 +612,6 @@ static int init_memory_block(struct memo base_memory_block_id(scn_nr) * sections_per_block; mem->end_section_nr = mem->start_section_nr + sections_per_block - 1; mem->state = state; - mem->last_online = ONLINE_KEEP; mem->section_count++; mutex_init(&mem->state_mutex); start_pfn = section_nr_to_pfn(mem->start_section_nr); Index: linux-pm/include/linux/memory.h =================================================================== --- linux-pm.orig/include/linux/memory.h +++ linux-pm/include/linux/memory.h @@ -26,7 +26,6 @@ struct memory_block { unsigned long start_section_nr; unsigned long end_section_nr; unsigned long state; - int last_online; int section_count; /*
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