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| author | Juergen Gross <jgross@suse.com> | 2021-03-01 11:13:35 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2021-03-06 12:49:48 +0100 |
| commit | de7b09ef658d637eed0584eaba30884e409aef31 (patch) | |
| tree | 3ad09023aa4e895a2f518ee6b898512bf4bdd6bc /kernel/smp.c | |
| parent | 8d0968cc6b8ffd8496c2ebffdfdc801f949a85e5 (diff) | |
| download | linux-de7b09ef658d637eed0584eaba30884e409aef31.tar.gz linux-de7b09ef658d637eed0584eaba30884e409aef31.tar.bz2 linux-de7b09ef658d637eed0584eaba30884e409aef31.zip | |
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
Diffstat (limited to 'kernel/smp.c')
| -rw-r--r-- | kernel/smp.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/kernel/smp.c b/kernel/smp.c index d5f0b21ab55e..6d7e6dbe33dc 100644 --- a/kernel/smp.c +++ b/kernel/smp.c @@ -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); } } |