> On Oct 29, 2020, at 3:38 PM, Andrii Nakryiko <[email protected]> 
> wrote:
> 
> On Thu, Oct 29, 2020 at 3:38 PM Ian Rogers <[email protected]> wrote:
>> 
>> If bits is 0, the case when the map is empty, then the >> is the size of
>> the register which is undefined behavior - on x86 it is the same as a
>> shift by 0. Fix by handling the 0 case explicitly and guarding calls to
>> hash_bits for empty maps in hashmap__for_each_key_entry and
>> hashmap__for_each_entry_safe.
>> 
>> Suggested-by: Andrii Nakryiko <[email protected]>,
>> Signed-off-by: Ian Rogers <[email protected]>
>> ---
> 
> Looks good. Thanks and sorry for unnecessary iterations.
> 
> Acked-by: Andrii Nakryiko <[email protected]>

Acked-by: Song Liu <[email protected]>

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