From: Sven Schnelle <svens@stackframe.org>
Date: Thu, 4 Apr 2019 16:16:03 +0000 (+0200)
Subject: parisc: regs_return_value() should return gpr28
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=224f5ab9bc035d25a01cc7a4d52722837163a293;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

parisc: regs_return_value() should return gpr28

commit 45efd871bf0a47648f119d1b41467f70484de5bc upstream.

While working on kretprobes for PA-RISC I was wondering while the
kprobes sanity test always fails on kretprobes. This is caused by
returning gpr20 instead of gpr28.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # 4.14+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/arch/parisc/include/asm/ptrace.h b/arch/parisc/include/asm/ptrace.h
index 46da07670c2b..c8f70f965e8e 100644
--- a/arch/parisc/include/asm/ptrace.h
+++ b/arch/parisc/include/asm/ptrace.h
@@ -22,7 +22,7 @@ unsigned long profile_pc(struct pt_regs *);
 
 static inline unsigned long regs_return_value(struct pt_regs *regs)
 {
-	return regs->gr[20];
+	return regs->gr[28];
 }
 
 #endif