From e49b1fae0ba4d06b29bd753a961abb447566bf4a Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Tue, 11 Jan 2011 19:48:14 +0000
Subject: [PATCH] powerpc: Don't silently handle machine checks from userspace
If a machine check comes from userspace we send a SIGBUS to the task and
fail to printk anything.
If we are taking machine checks due to bad hardware we want to know about
it right away. Furthermore if we don't complain loudly then it will look
a lot like a bug in the userspace application, potentially causing a lot
of confusion.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
arch/powerpc/kernel/traps.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 9e24224962d935..bd74fac169be0e 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -626,11 +626,6 @@ void machine_check_exception(struct pt_regs *regs)
if (recover > 0)
return;
- if (user_mode(regs)) {
- _exception(SIGBUS, regs, BUS_ADRERR, regs->nip);
- return;
- }
-
#if defined(CONFIG_8xx) && defined(CONFIG_PCI)
/* the qspan pci read routines can cause machine checks -- Cort
*
--
GitLab