Messages in this thread Patch in this message | | | Date | Thu, 11 Oct 2012 14:22:31 +0900 | From | Yasuaki Ishimatsu <> | Subject | [PATCH 1/2]suppress "Device memoryX does not have a release() function" warning |
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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.
CC: David Rientjes <rientjes@google.com> CC: Jiang Liu <liuj97@gmail.com> Cc: Minchan Kim <minchan.kim@gmail.com> CC: Andrew Morton <akpm@linux-foundation.org> CC: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> CC: Wen Congyang <wency@cn.fujitsu.com> Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> --- drivers/base/memory.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
Index: linux-3.6/drivers/base/memory.c =================================================================== --- linux-3.6.orig/drivers/base/memory.c 2012-10-11 11:37:33.404668048 +0900 +++ linux-3.6/drivers/base/memory.c 2012-10-11 11:38:27.865672989 +0900 @@ -70,6 +70,13 @@ void unregister_memory_isolate_notifier( } 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->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; @@ -630,7 +638,6 @@ int remove_memory_block(unsigned long no 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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