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locking/csd_lock: Prepare more CSD lock debugging 

In order to be able to easily add more CSD lock debugging data to
struct call_function_data->csd move the call_single_data_t element
into a sub-structure.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20210301101336.7797-3-jgross@suse.com
This commit is contained in:
Juergen Gross 2021-03-01 11:13:35 +01:00 committed by Ingo Molnar
parent 8d0968cc6b
commit de7b09ef65
1 changed files with 10 additions and 6 deletions
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16
kernel/smp.c
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@ -31,8 +31,12 @@
#define CSD_TYPE(_csd) ((_csd)->node.u_flags & CSD_FLAG_TYPE_MASK)
struct cfd_percpu {
call_single_data_t csd;
};
struct call_function_data {
call_single_data_t __percpu *csd;
struct cfd_percpu __percpu *pcpu;
cpumask_var_t cpumask;
cpumask_var_t cpumask_ipi;
};
@ -55,8 +59,8 @@ int smpcfd_prepare_cpu(unsigned int cpu)
free_cpumask_var(cfd->cpumask);
return -ENOMEM;
}
cfd->csd = alloc_percpu(call_single_data_t);
if (!cfd->csd) {
cfd->pcpu = alloc_percpu(struct cfd_percpu);
if (!cfd->pcpu) {
free_cpumask_var(cfd->cpumask);
free_cpumask_var(cfd->cpumask_ipi);
return -ENOMEM;
@ -71,7 +75,7 @@ int smpcfd_dead_cpu(unsigned int cpu)
free_cpumask_var(cfd->cpumask);
free_cpumask_var(cfd->cpumask_ipi);
free_percpu(cfd->csd);
free_percpu(cfd->pcpu);
return 0;
}
@ -694,7 +698,7 @@ static void smp_call_function_many_cond(const struct cpumask *mask,
cpumask_clear(cfd->cpumask_ipi);
for_each_cpu(cpu, cfd->cpumask) {
call_single_data_t *csd = per_cpu_ptr(cfd->csd, cpu);
call_single_data_t *csd = &per_cpu_ptr(cfd->pcpu, cpu)->csd;
if (cond_func && !cond_func(cpu, info))
continue;
@ -719,7 +723,7 @@ static void smp_call_function_many_cond(const struct cpumask *mask,
for_each_cpu(cpu, cfd->cpumask) {
call_single_data_t *csd;
csd = per_cpu_ptr(cfd->csd, cpu);
csd = &per_cpu_ptr(cfd->pcpu, cpu)->csd;
csd_lock_wait(csd);
}
}