> On 20-Oct-2020, at 2:22 PM, Aneesh Kumar K.V <[email protected]>
> wrote:
>
> "Aneesh Kumar K.V" <[email protected]> writes:
>
>> Hi Christoph,
>>
>> commit 6f42193fd86e ("memremap: don't use a separate devm action for
>> devmap_managed_enable_get") changed the static key updates such that we
>> are now calling devmap_managed_enable_put() without doing the equivalent
>> devmap_managed_enable_get().
>>
>> devmap_managed_enable_get() is only called for MEMORY_DEVICE_PRIVATE and
>> MEMORY_DEVICE_FS_DAX, But memunmap_pages() get called for other pgmap
>> types too. This result in the below. I can recreate this by repeatedly
>> switching between system-ram and devdax mode for devdax namespace.
>>
>>
>
>
> mm/memremap.c | 19 +++++++++++++++----
>
> modified mm/memremap.c
> @@ -158,6 +158,16 @@ void memunmap_pages(struct dev_pagemap *pgmap)
This fixes the warning for me.
Thanks
-Sachin
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