There's a common case where we want any online cpu except a particular one. This creates a helper to do that, otherwise we need a temp var and cpumask_andnot(). From: Rusty Russell Signed-off-by: Rusty Russell Signed-off-by: Mike Travis --- include/linux/cpumask.h | 3 +++ lib/cpumask.c | 10 ++++++++++ 2 files changed, 13 insertions(+) --- test-compile.orig/include/linux/cpumask.h +++ test-compile/include/linux/cpumask.h @@ -111,6 +111,7 @@ * * int cpumask_any(mask) Any cpu in mask * int cpumask_any_and(mask1,mask2) Any cpu in both masks + * int cpumask_any_but(mask,cpu) Any cpu in mask except cpu * * for_each_possible_cpu(cpu) for-loop cpu over cpu_possible_map * for_each_online_cpu(cpu) for-loop cpu over cpu_online_map @@ -458,6 +459,7 @@ extern cpumask_t cpu_mask_all; #define cpumask_first(src) ({ (void)(src); 0; }) #define cpumask_next(n, src) ({ (void)(src); 1; }) #define cpumask_next_and(n, srcp, andp) ({ (void)(srcp), (void)(andp); 1; }) +#define cpumask_any_but(mask, cpu) ({ (void)(mask); (void)(cpu); 0; }) #define for_each_cpu(cpu, mask) \ for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask) @@ -469,6 +471,7 @@ extern cpumask_t cpu_mask_all; int cpumask_first(const cpumask_t *srcp); int cpumask_next(int n, const cpumask_t *srcp); int cpumask_next_and(int n, const cpumask_t *srcp, const cpumask_t *andp); +int cpumask_any_but(const struct cpumask *mask, unsigned int cpu); #define for_each_cpu(cpu, mask) \ for ((cpu) = -1; \ --- test-compile.orig/lib/cpumask.c +++ test-compile/lib/cpumask.c @@ -24,6 +24,16 @@ int cpumask_next_and(int n, const cpumas } EXPORT_SYMBOL(cpumask_next_and); +int cpumask_any_but(const struct cpumask *mask, unsigned int cpu) +{ + unsigned int i; + + for_each_cpu(i, mask) + if (i != cpu) + break; + return i; +} + /* These are not inline because of header tangles. */ #ifdef CONFIG_CPUMASK_OFFSTACK bool alloc_cpumask_var(cpumask_var_t *mask, gfp_t flags) --