diff options
Diffstat (limited to 'include/linux/cpumask.h')
| -rw-r--r-- | include/linux/cpumask.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h index 2997af6d2ccd..b950e9d6008b 100644 --- a/include/linux/cpumask.h +++ b/include/linux/cpumask.h @@ -666,10 +666,19 @@ static inline size_t cpumask_size(void) * * This code makes NR_CPUS length memcopy and brings to a memory corruption. * cpumask_copy() provide safe copy functionality. + * + * Note that there is another evil here: If you define a cpumask_var_t + * as a percpu variable then the way to obtain the address of the cpumask + * structure differently influences what this_cpu_* operation needs to be + * used. Please use this_cpu_cpumask_var_t in those cases. The direct use + * of this_cpu_ptr() or this_cpu_read() will lead to failures when the + * other type of cpumask_var_t implementation is configured. */ #ifdef CONFIG_CPUMASK_OFFSTACK typedef struct cpumask *cpumask_var_t; +#define this_cpu_cpumask_var_ptr(x) this_cpu_read(x) + bool alloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, int node); bool alloc_cpumask_var(cpumask_var_t *mask, gfp_t flags); bool zalloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, int node); @@ -681,6 +690,8 @@ void free_bootmem_cpumask_var(cpumask_var_t mask); #else typedef struct cpumask cpumask_var_t[1]; +#define this_cpu_cpumask_var_ptr(x) this_cpu_ptr(x) + static inline bool alloc_cpumask_var(cpumask_var_t *mask, gfp_t flags) { return true; @@ -792,6 +803,23 @@ static inline const struct cpumask *get_cpu_mask(unsigned int cpu) } #endif /* NR_CPUS > BITS_PER_LONG */ +/** + * cpumap_print_to_pagebuf - copies the cpumask into the buffer either + * as comma-separated list of cpus or hex values of cpumask + * @list: indicates whether the cpumap must be list + * @mask: the cpumask to copy + * @buf: the buffer to copy into + * + * Returns the length of the (null-terminated) @buf string, zero if + * nothing is copied. + */ +static inline ssize_t +cpumap_print_to_pagebuf(bool list, char *buf, const struct cpumask *mask) +{ + return bitmap_print_to_pagebuf(list, buf, cpumask_bits(mask), + nr_cpumask_bits); +} + /* * * From here down, all obsolete. Use cpumask_ variants! |