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Driver core / memory: Simplify __memory_block_change_state()

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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 <[email protected]>
Acked-by: Greg Kroah-Hartman <[email protected]>
Reviewed-by: Tang Chen <[email protected]>
This commit is contained in:
Rafael J. Wysocki 2013-05-23 10:38:55 +02:00
commit b2c064b25a
2 changed files with 2 additions and 10 deletions
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11
drivers/base/memory.c
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@ -291,13 +291,7 @@ static int __memory_block_change_state(struct memory_block *mem,
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 device *dev)
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 memory_block **memory,
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);