On 3/18/19 5:41 PM, Paul E. McKenney wrote:
> On Sun, Mar 17, 2019 at 02:22:54PM +0200, Nikos Tsironis wrote:
>> Add hlist_bl_add_before/behind helpers to add an element before/after an
>> existing element in a bl_list.
>>
>> Signed-off-by: Nikos Tsironis <ntsironis@xxxxxxxxxxx>
>> Signed-off-by: Ilias Tsitsimpis <iliastsi@xxxxxxxxxxx>
>
> On both this and the previous patch, the double signed-off-by lines
> are a bit strange. You might be wanting Co-developed-by, but please
> see Documentation/process/submitting-patches.rst.
Hi Paul,
Thanks for your suggestion. I will make sure to reread the Documentation
regarding patch submission.
Thanks,
Nikos
>
> Other than that:
>
> Reviewed-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxx>
>
>> ---
>> include/linux/list_bl.h | 26 ++++++++++++++++++++++++++
>> 1 file changed, 26 insertions(+)
>>
>> diff --git a/include/linux/list_bl.h b/include/linux/list_bl.h
>> index 3fc2cc57ba1b..ae1b541446c9 100644
>> --- a/include/linux/list_bl.h
>> +++ b/include/linux/list_bl.h
>> @@ -86,6 +86,32 @@ static inline void hlist_bl_add_head(struct hlist_bl_node *n,
>> hlist_bl_set_first(h, n);
>> }
>>
>> +static inline void hlist_bl_add_before(struct hlist_bl_node *n,
>> + struct hlist_bl_node *next)
>> +{
>> + struct hlist_bl_node **pprev = next->pprev;
>> +
>> + n->pprev = pprev;
>> + n->next = next;
>> + next->pprev = &n->next;
>> +
>> + /* pprev may be `first`, so be careful not to lose the lock bit */
>> + WRITE_ONCE(*pprev,
>> + (struct hlist_bl_node *)
>> + ((uintptr_t)n | ((uintptr_t)*pprev & LIST_BL_LOCKMASK)));
>> +}
>> +
>> +static inline void hlist_bl_add_behind(struct hlist_bl_node *n,
>> + struct hlist_bl_node *prev)
>> +{
>> + n->next = prev->next;
>> + n->pprev = &prev->next;
>> + prev->next = n;
>> +
>> + if (n->next)
>> + n->next->pprev = &n->next;
>> +}
>> +
>> static inline void __hlist_bl_del(struct hlist_bl_node *n)
>> {
>> struct hlist_bl_node *next = n->next;
>> --
>> 2.11.0
>>
>
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