| kern_shutdown.c (206878) | kern_shutdown.c (206897) |
|---|---|
| 1/*- 2 * Copyright (c) 1986, 1988, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. --- 21 unchanged lines hidden (view full) --- 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)kern_shutdown.c 8.3 (Berkeley) 1/21/94 35 */ 36 37#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 1986, 1988, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. --- 21 unchanged lines hidden (view full) --- 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)kern_shutdown.c 8.3 (Berkeley) 1/21/94 35 */ 36 37#include <sys/cdefs.h> |
| 38__FBSDID("$FreeBSD: head/sys/kern/kern_shutdown.c 206878 2010-04-19 23:27:54Z attilio $"); | 38__FBSDID("$FreeBSD: head/sys/kern/kern_shutdown.c 206897 2010-04-20 12:22:06Z attilio $"); |
| 39 40#include "opt_ddb.h" 41#include "opt_kdb.h" 42#include "opt_panic.h" 43#include "opt_show_busybufs.h" 44#include "opt_sched.h" 45 46#include <sys/param.h> --- 444 unchanged lines hidden (view full) --- 491 /* 492 * Acquiring smp_ipi_mtx here has a double effect: 493 * - it disables interrupts avoiding CPU0 preemption 494 * by fast handlers (thus deadlocking against other CPUs) 495 * - it avoids deadlocks against smp_rendezvous() or, more 496 * generally, threads busy-waiting, with this spinlock held, 497 * and waiting for responses by threads on other CPUs 498 * (ie. smp_tlb_shootdown()). | 39 40#include "opt_ddb.h" 41#include "opt_kdb.h" 42#include "opt_panic.h" 43#include "opt_show_busybufs.h" 44#include "opt_sched.h" 45 46#include <sys/param.h> --- 444 unchanged lines hidden (view full) --- 491 /* 492 * Acquiring smp_ipi_mtx here has a double effect: 493 * - it disables interrupts avoiding CPU0 preemption 494 * by fast handlers (thus deadlocking against other CPUs) 495 * - it avoids deadlocks against smp_rendezvous() or, more 496 * generally, threads busy-waiting, with this spinlock held, 497 * and waiting for responses by threads on other CPUs 498 * (ie. smp_tlb_shootdown()). |
| 499 * 500 * For the !SMP case it just needs to handle the former problem. |
|
| 499 */ | 501 */ |
| 502#ifdef SMP |
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| 500 mtx_lock_spin(&smp_ipi_mtx); | 503 mtx_lock_spin(&smp_ipi_mtx); |
| 504#else 505 spinlock_enter(); 506#endif |
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| 501 502 /* cpu_boot(howto); */ /* doesn't do anything at the moment */ 503 cpu_reset(); 504 /* NOTREACHED */ /* assuming reset worked */ 505} 506 507#ifdef SMP 508static u_int panic_cpu = NOCPU; --- 201 unchanged lines hidden --- | 507 508 /* cpu_boot(howto); */ /* doesn't do anything at the moment */ 509 cpu_reset(); 510 /* NOTREACHED */ /* assuming reset worked */ 511} 512 513#ifdef SMP 514static u_int panic_cpu = NOCPU; --- 201 unchanged lines hidden --- |