On 07/25/2013 05:21 PM, Heiko Carstens wrote:
On Wed, Jul 24, 2013 at 10:09:13PM -0400, Zhouping Liu wrote:
Hello All,
I met the below error on b3a3a9c441 with s390x arch:
arch/s390/built-in.o: In function `sys_call_table_emu':
(.rodata+0x2b98): undefined reference to `sie_exit'
arch/s390/built-in.o: In function `sys_call_table_emu':
(.rodata+0x2ba0): undefined reference to `sie_exit'
make: *** [vmlinux] Error 1
Thanks for reporting, I just committed the patch below to our
local branch:
From c073dc1f474094b5610739e752d83bcb547b1d7d Mon Sep 17 00:00:00 2001
From: Heiko Carstens <heiko.carst...@de.ibm.com>
Date: Thu, 25 Jul 2013 11:16:48 +0200
Subject: [PATCH] s390/perf: fix compile error (undefined reference sie_exit)
The perf_event code references sie_exit even if KVM is not available.
So add proper ifdefs to fix this one:
arch/s390/built-in.o: In function `sys_call_table_emu':
(.rodata+0x2b98): undefined reference to `sie_exit'
arch/s390/built-in.o: In function `sys_call_table_emu':
(.rodata+0x2ba0): undefined reference to `sie_exit'
make: *** [vmlinux] Error 1
The patch is good for me.
Tested-by: Zhouping Liu <z...@redhat.com>
Thanks,
Zhouping
Reported-by: Zhouping Liu <z...@redhat.com>
Signed-off-by: Heiko Carstens <heiko.carst...@de.ibm.com>
---
arch/s390/kernel/perf_event.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/arch/s390/kernel/perf_event.c b/arch/s390/kernel/perf_event.c
index a6fc037..500aa10 100644
--- a/arch/s390/kernel/perf_event.c
+++ b/arch/s390/kernel/perf_event.c
@@ -52,12 +52,13 @@ static struct kvm_s390_sie_block *sie_block(struct pt_regs
*regs)
static bool is_in_guest(struct pt_regs *regs)
{
- unsigned long ip = instruction_pointer(regs);
-
if (user_mode(regs))
return false;
-
- return ip == (unsigned long) &sie_exit;
+#if defined(CONFIG_KVM) || defined(CONFIG_KVM_MODULE)
+ return instruction_pointer(regs) == (unsigned long) &sie_exit;
+#else
+ return false;
+#endif
}
static unsigned long guest_is_user_mode(struct pt_regs *regs)
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
