svn commit: r207921 - head/sys/kern
Attilio Rao
attilio at FreeBSD.org
Tue May 11 15:36:17 UTC 2010
Author: attilio
Date: Tue May 11 15:36:16 2010
New Revision: 207921
URL: http://svn.freebsd.org/changeset/base/207921
Log:
Fix a hang introduced in r206878 for kernel compiled with SMP support but
being not actual SMP and similar situations by always initializing the
smp ipi mutex.
Reported by: marius
MFC after: 3 days
X-MFC: r206878
Modified:
head/sys/kern/subr_smp.c
Modified: head/sys/kern/subr_smp.c
==============================================================================
--- head/sys/kern/subr_smp.c Tue May 11 15:32:21 2010 (r207920)
+++ head/sys/kern/subr_smp.c Tue May 11 15:36:16 2010 (r207921)
@@ -137,6 +137,8 @@ static void
mp_start(void *dummy)
{
+ mtx_init(&smp_ipi_mtx, "smp rendezvous", NULL, MTX_SPIN);
+
/* Probe for MP hardware. */
if (smp_disabled != 0 || cpu_mp_probe() == 0) {
mp_ncpus = 1;
@@ -144,7 +146,6 @@ mp_start(void *dummy)
return;
}
- mtx_init(&smp_ipi_mtx, "smp rendezvous", NULL, MTX_SPIN);
cpu_mp_start();
printf("FreeBSD/SMP: Multiprocessor System Detected: %d CPUs\n",
mp_ncpus);
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