linux-kernel - [PATCH] x86_64: ifdef out struct thread

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Message-ID: <20090503233015.GJ16631@x200.localdomain>
Date:	Mon, 4 May 2009 03:30:15 +0400
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	mingo@...e.hu
Cc:	linux-kernel@...r.kernel.org, containers@...ts.linux-foundation.org
Subject: [PATCH] x86_64: ifdef out struct thread_struct::ip

struct thread_struct::ip isn't used on x86_64, struct pt_regs::ip is used
instead.

kgdb should be reading 0 always, but I can't check it.

Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---
 arch/x86/include/asm/processor.h |    2 ++
 arch/x86/kernel/kgdb.c           |    2 +-
 2 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index a6732ff..a9ba743 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -427,7 +427,9 @@ struct thread_struct {
 	unsigned short		fsindex;
 	unsigned short		gsindex;
 #endif
+#ifdef CONFIG_X86_32
 	unsigned long		ip;
+#endif
 #ifdef CONFIG_X86_64
 	unsigned long		fs;
 #endif
diff --git a/arch/x86/kernel/kgdb.c b/arch/x86/kernel/kgdb.c
index eedfaeb..d07706f 100644
--- a/arch/x86/kernel/kgdb.c
+++ b/arch/x86/kernel/kgdb.c
@@ -141,7 +141,7 @@ void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)
 	gdb_regs32[GDB_PS]	= *(unsigned long *)(p->thread.sp + 8);
 	gdb_regs32[GDB_CS]	= __KERNEL_CS;
 	gdb_regs32[GDB_SS]	= __KERNEL_DS;
-	gdb_regs[GDB_PC]	= p->thread.ip;
+	gdb_regs[GDB_PC]	= 0;
 	gdb_regs[GDB_R8]	= 0;
 	gdb_regs[GDB_R9]	= 0;
 	gdb_regs[GDB_R10]	= 0;
--
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