linux-kernel - [PATCH RESEND] riscv : select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION

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Message-Id: <20220923100149.2647325-1-suagrfillet@gmail.com>
Date:   Fri, 23 Sep 2022 18:01:49 +0800
From:   Song Shuai <suagrfillet@...il.com>
To:     paul.walmsley@...ive.com, palmer@...belt.com, aou@...s.berkeley.edu
Cc:     guoren@...ux.alibaba.com, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Song Shuai <suagrfillet@...il.com>
Subject: [PATCH RESEND] riscv : select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY

riscv now uses -fpatchable-function-entry with dynamic ftrace after
the `afc76b8b8` commit, which means recordmcount shouldn't be called
to create the __mcount_loc section before the vmlinux linking.

We should select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY to tell
Makefile not to run recordmcount.

Signed-off-by: Song Shuai <suagrfillet@...il.com>
---
 arch/riscv/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index c22f58155948..25db8cea876a 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -246,6 +246,7 @@ config ARCH_RV64I
 	select HAVE_DYNAMIC_FTRACE if !XIP_KERNEL && MMU && $(cc-option,-fpatchable-function-entry=8)
 	select HAVE_DYNAMIC_FTRACE_WITH_REGS if HAVE_DYNAMIC_FTRACE
 	select HAVE_FTRACE_MCOUNT_RECORD if !XIP_KERNEL
+	select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY if DYNAMIC_FTRACE
 	select HAVE_FUNCTION_GRAPH_TRACER
 	select HAVE_FUNCTION_TRACER if !XIP_KERNEL
 	select SWIOTLB if MMU
-- 
2.20.1