linux-kernel - [PATCH 22/52] add reboot_force test to native_smp_send

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon,  3 Mar 2008 14:12:50 -0300
From:	Glauber Costa <gcosta@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	akpm@...ux-foundation.org, glommer@...il.com, mingo@...e.hu,
	tglx@...utronix.de, Glauber Costa <gcosta@...hat.com>
Subject: [PATCH 22/52] add reboot_force test to native_smp_send_stop

This can be safely added to i386. After that,
functions look exactly the same for both arches

Signed-off-by: Glauber Costa <gcosta@...hat.com>
---
 arch/x86/kernel/smp_32.c |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/smp_32.c b/arch/x86/kernel/smp_32.c
index cde3a0e..8be3e09 100644
--- a/arch/x86/kernel/smp_32.c
+++ b/arch/x86/kernel/smp_32.c
@@ -24,6 +24,7 @@
 #include <asm/tlbflush.h>
 #include <asm/mmu_context.h>
 #include <mach_apic.h>
+#include <asm/proto.h>
 
 /*
  *	Some notes on x86 processor bugs affecting SMP operation:
@@ -622,10 +623,14 @@ static void stop_this_cpu (void * dummy)
 
 static void native_smp_send_stop(void)
 {
-	/* Don't deadlock on the call lock in panic */
-	int nolock = !spin_trylock(&call_lock);
+	int nolock;
 	unsigned long flags;
 
+	if (reboot_force)
+		return;
+
+	/* Don't deadlock on the call lock in panic */
+	nolock = !spin_trylock(&call_lock);
 	local_irq_save(flags);
 	__smp_call_function(stop_this_cpu, NULL, 0, 0);
 	if (!nolock)
-- 
1.5.0.6

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/