Commit fa7194eb authored Dec 11, 2012 by Yasuaki Ishimatsu Committed by Linus Torvalds Dec 11, 2012

memory hotplug: suppress "Device memoryX does not have a release() function" warning



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."

The reason is memory_block's device struct does not have a release()
function.

So the patch registers memory_block_release() to the device's release()
function for suppressing the warning message.  Additionally, the patch
moves kfree(mem) into the release function since the release function is
prepared as a means to free a memory_block struct.

Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Jiang Liu <liuj97@gmail.com>
Cc: Minchan Kim <minchan.kim@gmail.com>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Wen Congyang <wency@cn.fujitsu.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent b3092b3b

drivers/base/memory.c

+8 −1

Original line number	Diff line number	Diff line
		@@ -70,6 +70,13 @@ void unregister_memory_isolate_notifier(struct notifier_block *nb)
		}
		EXPORT_SYMBOL(unregister_memory_isolate_notifier);

		static void memory_block_release(struct device *dev)
		{
		struct memory_block *mem = container_of(dev, struct memory_block, dev);

		kfree(mem);
		}

		/*
		* register_memory - Setup a sysfs device for a memory block
		*/
		@@ -80,6 +87,7 @@ 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 = memory_block_release;

		error = device_register(&memory->dev);
		return error;
		@@ -635,7 +643,6 @@ 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);