[PATCH v6 3.2-rc1 15/28] x86: Define x86_64 specific uprobe_task_arch_info structure

[Srikar Dronamraju <srikar@linux.vnet.ibm.com>]

On x86_64, need to handle RIP relative instructions, which requires us to
save and restore a register.

Signed-off-by: Jim Keniston <jkenisto@us.ibm.com>
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
---
 arch/x86/include/asm/uprobes.h |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/uprobes.h b/arch/x86/include/asm/uprobes.h
index 19a5949..cf794bf 100644
--- a/arch/x86/include/asm/uprobes.h
+++ b/arch/x86/include/asm/uprobes.h
@@ -36,8 +36,13 @@ typedef u8 uprobe_opcode_t;
 struct uprobe_arch_info {
 	unsigned long rip_rela_target_address;
 };
+
+struct uprobe_task_arch_info {
+	unsigned long saved_scratch_register;
+};
 #else
 struct uprobe_arch_info {};
+struct uprobe_task_arch_info {};
 #endif
 struct uprobe;
 extern int analyze_insn(struct mm_struct *mm, struct uprobe *uprobe);

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