Re: [Xen-devel] [PATCH 02 of 10 v2] xen, libxc: introduce node maps and masks

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 19.12.12 at 20:07, Dario Faggioli <dario.faggioli@xxxxxxxxxx> wrote:
> --- a/xen/include/xen/nodemask.h
> +++ b/xen/include/xen/nodemask.h
> @@ -298,6 +298,53 @@ static inline int __nodemask_parse(const
>  }
>  #endif
>  
> +/*
> + * nodemask_var_t: struct nodemask for stack usage.
> + *
> + * See definition of cpumask_var_t in include/xen//cpumask.h.
> + */
> +#if MAX_NUMNODES > 2 * BITS_PER_LONG

Is that case reasonable to expect?

Jan

> +#include <xen/xmalloc.h>
> +
> +typedef nodemask_t *nodemask_var_t;
> +
> +#define nr_nodemask_bits (BITS_TO_LONGS(MAX_NUMNODES) * BITS_PER_LONG)
> +
> +static inline bool_t alloc_nodemask_var(nodemask_var_t *mask)
> +{
> +     *(void **)mask = _xmalloc(nr_nodemask_bits / 8, sizeof(long));
> +     return *mask != NULL;
> +}
> +
> +static inline bool_t zalloc_nodemask_var(nodemask_var_t *mask)
> +{
> +     *(void **)mask = _xzalloc(nr_nodemask_bits / 8, sizeof(long));
> +     return *mask != NULL;
> +}
> +
> +static inline void free_nodemask_var(nodemask_var_t mask)
> +{
> +     xfree(mask);
> +}
> +#else
> +typedef nodemask_t nodemask_var_t;
> +
> +static inline bool_t alloc_nodemask_var(nodemask_var_t *mask)
> +{
> +     return 1;
> +}
> +
> +static inline bool_t zalloc_nodemask_var(nodemask_var_t *mask)
> +{
> +     nodes_clear(*mask);
> +     return 1;
> +}
> +
> +static inline void free_nodemask_var(nodemask_var_t mask)
> +{
> +}
> +#endif
> +
>  #if MAX_NUMNODES > 1
>  #define for_each_node_mask(node, mask)                       \
>       for ((node) = first_node(mask);                 \




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