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scftorture: Consolidate scftorture_invoke_one() scf_check initialization 

This commit hoists much of the initialization of the scf_check
structure out of the switch statement, thus saving a few lines of code.
The initialization of the ->scfc_in field remains in each leg of the
switch statement in order to more heavily stress memory ordering.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2020-07-09 13:58:32 -07:00
parent 676e546964
commit 4df55bddc1
1 changed files with 8 additions and 13 deletions
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21
kernel/scftorture.c
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@ -299,8 +299,13 @@ static void scftorture_invoke_one(struct scf_statistics *scfp, struct torture_ra
preempt_disable();
if (scfsp->scfs_prim == SCF_PRIM_SINGLE || scfsp->scfs_wait) {
scfcp = kmalloc(sizeof(*scfcp), GFP_ATOMIC);
if (WARN_ON_ONCE(!scfcp))
if (WARN_ON_ONCE(!scfcp)) {
atomic_inc(&n_alloc_errs);
} else {
scfcp->scfc_cpu = -1;
scfcp->scfc_wait = scfsp->scfs_wait;
scfcp->scfc_out = false;
}
}
switch (scfsp->scfs_prim) {
case SCF_PRIM_SINGLE:
@ -311,8 +316,6 @@ static void scftorture_invoke_one(struct scf_statistics *scfp, struct torture_ra
scfp->n_single++;
if (scfcp) {
scfcp->scfc_cpu = cpu;
scfcp->scfc_wait = scfsp->scfs_wait;
scfcp->scfc_out = false;
scfcp->scfc_in = true;
}
ret = smp_call_function_single(cpu, scf_handler_1, (void *)scfcp, scfsp->scfs_wait);
@ -330,12 +333,8 @@ static void scftorture_invoke_one(struct scf_statistics *scfp, struct torture_ra
scfp->n_many_wait++;
else
scfp->n_many++;
if (scfcp) {
scfcp->scfc_cpu = -1;
scfcp->scfc_wait = true;
scfcp->scfc_out = false;
if (scfcp)
scfcp->scfc_in = true;
}
smp_call_function_many(cpu_online_mask, scf_handler, scfcp, scfsp->scfs_wait);
break;
case SCF_PRIM_ALL:
@ -343,12 +342,8 @@ static void scftorture_invoke_one(struct scf_statistics *scfp, struct torture_ra
scfp->n_all_wait++;
else
scfp->n_all++;
if (scfcp) {
scfcp->scfc_cpu = -1;
scfcp->scfc_wait = true;
scfcp->scfc_out = false;
if (scfcp)
scfcp->scfc_in = true;
}
smp_call_function(scf_handler, scfcp, scfsp->scfs_wait);
break;
}