lkml.org 
[lkml]   [2022]   [Dec]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3] riscv : select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY
Date
In RISC-V, -fpatchable-function-entry option is used to support
dynamic ftrace in this commit afc76b8b8011 ("riscv: Using
PATCHABLE_FUNCTION_ENTRY instead of MCOUNT"). So recordmcount
don't have to be called to create the __mcount_loc section before
the vmlinux linking.

Here selects FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY to tell
Makefile not to run recordmcount.

Link_v1: https://lore.kernel.org/linux-riscv/CAAYs2=j3Eak9vU6xbAw0zPuoh00rh8v5C2U3fePkokZFibWs2g@mail.gmail.com/T/#t
Link_v2: https://lore.kernel.org/linux-riscv/CAAYs2=iYn8sLQB8oh+RzTKd2VKs8MXOLX6Mwpamx5gdVVN6mkA@mail.gmail.com/T/#m62138d7a76664798d00051818a438a601eff4cf1
Signed-off-by: Song Shuai <suagrfillet@gmail.com>
Tested-by: Guo Ren <guoren@kernel.org>
---
arch/riscv/Kconfig | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 572973103d73..c19cddb8feb9 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -277,6 +277,7 @@ config ARCH_RV64I
select 64BIT
select ARCH_SUPPORTS_INT128 if CC_HAS_INT128
select HAVE_DYNAMIC_FTRACE if !XIP_KERNEL && MMU && $(cc-option,-fpatchable-function-entry=8)
+ select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY if DYNAMIC_FTRACE
select HAVE_DYNAMIC_FTRACE_WITH_REGS if HAVE_DYNAMIC_FTRACE
select HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
select HAVE_SAMPLE_FTRACE_DIRECT
--
2.20.1
\
 
 \ /
  Last update: 2022-12-01 16:15    [W:0.051 / U:2.752 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site