linux-kernel - [PATCH v1 4/4] powerpc/ftrace: Use STK_GOT in ftrace

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Message-Id: <9042bb30fa972056715fe5b6598a7c8049681293.1645099283.git.christophe.leroy@csgroup.eu>
Date:   Thu, 17 Feb 2022 13:01:59 +0100
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     "Naveen N . Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     Christophe Leroy <christophe.leroy@...roup.eu>,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v1 4/4] powerpc/ftrace: Use STK_GOT in ftrace_mprofile.S

Instead of open coding offset value 24, use STK_GOT when
accessing got register in stack.

Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
 arch/powerpc/kernel/trace/ftrace_mprofile.S | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/kernel/trace/ftrace_mprofile.S b/arch/powerpc/kernel/trace/ftrace_mprofile.S
index f5d31c458e6b..4fa23e260cab 100644
--- a/arch/powerpc/kernel/trace/ftrace_mprofile.S
+++ b/arch/powerpc/kernel/trace/ftrace_mprofile.S
@@ -82,7 +82,7 @@
 
 #ifdef CONFIG_PPC64
 	/* Save callee's TOC in the ABI compliant location */
-	std	r2, 24(r1)
+	std	r2, STK_GOT(r1)
 	ld	r2,PACATOC(r13)	/* get kernel TOC in r2 */
 
 	addis	r3,r2,function_trace_op@toc@ha
@@ -140,7 +140,7 @@
 
 #ifdef CONFIG_PPC64
 	/* Restore callee's TOC */
-	ld	r2, 24(r1)
+	ld	r2, STK_GOT(r1)
 #endif
 
 	/* Pop our stack frame */
-- 
2.34.1