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charset=us-ascii Content-Disposition: inline In-Reply-To: <20241203154917.123419-2-arighi@nvidia.com> On Tue, Dec 03, 2024 at 04:36:10PM +0100, Andrea Righi wrote: > Introduce NUMA node iterators to support circular iteration, starting > from a specified node. > > Signed-off-by: Andrea Righi Acked-by: Yury Norov > --- > include/linux/nodemask.h | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/include/linux/nodemask.h b/include/linux/nodemask.h > index b61438313a73..7ba35c65ab99 100644 > --- a/include/linux/nodemask.h > +++ b/include/linux/nodemask.h > @@ -392,6 +392,16 @@ static inline void __nodes_fold(nodemask_t *dstp, const nodemask_t *origp, > for ((node) = 0; (node) < 1 && !nodes_empty(mask); (node)++) > #endif /* MAX_NUMNODES */ > > +#if MAX_NUMNODES > 1 > +#define for_each_node_mask_wrap(node, mask, start) \ > + for_each_set_bit_wrap((node), (mask).bits, MAX_NUMNODES, (start)) > +#else /* MAX_NUMNODES == 1 */ > +#define for_each_node_mask_wrap(node, mask, start) \ > + for ((node) = 0; \ > + (node) < 1 && !nodes_empty(mask); \ > + (node)++, (void)(start)) > +#endif /* MAX_NUMNODES */ > + > /* > * Bitmasks that are kept for all the nodes. > */ > @@ -441,6 +451,9 @@ static inline int num_node_state(enum node_states state) > #define for_each_node_state(__node, __state) \ > for_each_node_mask((__node), node_states[__state]) > > +#define for_each_node_state_wrap(__node, __state, __start) \ > + for_each_node_mask_wrap((__node), node_states[__state], __start) > + > #define first_online_node first_node(node_states[N_ONLINE]) > #define first_memory_node first_node(node_states[N_MEMORY]) > static inline unsigned int next_online_node(int nid) > @@ -535,6 +548,7 @@ static inline int node_random(const nodemask_t *maskp) > > #define for_each_node(node) for_each_node_state(node, N_POSSIBLE) > #define for_each_online_node(node) for_each_node_state(node, N_ONLINE) > +#define for_each_online_node_wrap(node, start) for_each_node_state(node, N_ONLINE, start) > > /* > * For nodemask scratch area. > -- > 2.47.1