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Disable interrupt and preemption for smp_rendezvous() also in the

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UP/!SMP case.
The callbacks may be relying on this feature and having 2 different
ways to deal with them is not correct.

Reported by:	rstone
Reviewed by:	jhb
MFC after:	2 weeks
This commit is contained in:
Attilio Rao 2011-11-03 14:36:56 +00:00
parent 0fc9f11d00
commit 2b10b1f872
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=227058
1 changed files with 12 additions and 0 deletions
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12
sys/kern/subr_smp.c
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@ -415,13 +415,16 @@ smp_rendezvous_cpus(cpuset_t map,
{
int curcpumap, i, ncpus = 0;
/* Look comments in the !SMP case. */
if (!smp_started) {
spinlock_enter();
if (setup_func != NULL)
setup_func(arg);
if (action_func != NULL)
action_func(arg);
if (teardown_func != NULL)
teardown_func(arg);
spinlock_exit();
return;
}
@ -666,12 +669,18 @@ smp_rendezvous_cpus(cpuset_t map,
void (*teardown_func)(void *),
void *arg)
{
/*
* In the !SMP case we just need to ensure the same initial conditions
* as the SMP case.
*/
spinlock_enter();
if (setup_func != NULL)
setup_func(arg);
if (action_func != NULL)
action_func(arg);
if (teardown_func != NULL)
teardown_func(arg);
spinlock_exit();
}
void
@ -681,12 +690,15 @@ smp_rendezvous(void (*setup_func)(void *),
void *arg)
{
/* Look comments in the smp_rendezvous_cpus() case. */
spinlock_enter();
if (setup_func != NULL)
setup_func(arg);
if (action_func != NULL)
action_func(arg);
if (teardown_func != NULL)
teardown_func(arg);
spinlock_exit();
}
/*