On 2012-8-3 15:49, wency@xxxxxxxxxxxxxx wrote:
> From: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
>
> When calling remove_memory_block(), the function shows following message at
> device_release().
>
> Device 'memory528' does not have a release() function, it is broken and must
> be fixed.
>
I found this warning too when doing memory-hotplug,
why not send as a bug fix patch?
The same as [RFC PATCH V6 18/19] memory-hotplug: add node_device_release
> remove_memory_block() calls kfree(mem). I think it shouled be called from
> device_release(). So the patch implements memory_block_release()
>
> CC: David Rientjes <rientjes@xxxxxxxxxx>
> CC: Jiang Liu <liuj97@xxxxxxxxx>
> CC: Len Brown <len.brown@xxxxxxxxx>
> CC: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
> CC: Paul Mackerras <paulus@xxxxxxxxx>
> CC: Christoph Lameter <cl@xxxxxxxxx>
> Cc: Minchan Kim <minchan.kim@xxxxxxxxx>
> CC: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> CC: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
> CC: Wen Congyang <wency@xxxxxxxxxxxxxx>
> Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
> ---
> drivers/base/memory.c | 11 ++++++++++-
> 1 files changed, 10 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/base/memory.c b/drivers/base/memory.c
> index 038be73..1cd3ef3 100644
> --- a/drivers/base/memory.c
> +++ b/drivers/base/memory.c
> @@ -109,6 +109,15 @@ bool is_memblk_offline(unsigned long start, unsigned long size)
> }
> EXPORT_SYMBOL(is_memblk_offline);
>
> +#define to_memory_block(device) container_of(device, struct memory_block, dev)
> +
> +static void release_memory_block(struct device *dev)
> +{
> + struct memory_block *mem = to_memory_block(dev);
> +
> + kfree(mem);
> +}
> +
> /*
> * register_memory - Setup a sysfs device for a memory block
> */
> @@ -119,6 +128,7 @@ int register_memory(struct memory_block *memory)
>
> memory->dev.bus = &memory_subsys;
> memory->dev.id = memory->start_section_nr / sections_per_block;
> + memory->dev.release = release_memory_block;
>
> error = device_register(&memory->dev);
> return error;
> @@ -674,7 +684,6 @@ int remove_memory_block(unsigned long node_id, struct mem_section *section,
> mem_remove_simple_file(mem, phys_device);
> mem_remove_simple_file(mem, removable);
> unregister_memory(mem);
> - kfree(mem);
> } else
> kobject_put(&mem->dev.kobj);
>
>
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