linux-kernel - [PATCH 5.13 030/151] riscv: kexec: do not add -mno-relax flag if compiler doesnt support it

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Message-Id: <20210816125445.069530835@linuxfoundation.org>
Date:   Mon, 16 Aug 2021 15:01:00 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Changbin Du <changbin.du@...il.com>,
        Palmer Dabbelt <palmerdabbelt@...gle.com>
Subject: [PATCH 5.13 030/151] riscv: kexec: do not add -mno-relax flag if compiler doesnt support it

From: Changbin Du <changbin.du@...il.com>

commit 030d6dbf0c2e5fdf23ad29557f0c87a882993e26 upstream.

The RISC-V special option '-mno-relax' which to disable linker relaxations
is supported by GCC8+. For GCC7 and lower versions do not support this
option.

Fixes: fba8a8674f68 ("RISC-V: Add kexec support")
Signed-off-by: Changbin Du <changbin.du@...il.com>
Cc: stable@...r.kernel.org
Signed-off-by: Palmer Dabbelt <palmerdabbelt@...gle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/riscv/kernel/Makefile |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/riscv/kernel/Makefile
+++ b/arch/riscv/kernel/Makefile
@@ -11,7 +11,7 @@ endif
 CFLAGS_syscall_table.o	+= $(call cc-option,-Wno-override-init,)
 
 ifdef CONFIG_KEXEC
-AFLAGS_kexec_relocate.o := -mcmodel=medany -mno-relax
+AFLAGS_kexec_relocate.o := -mcmodel=medany $(call cc-option,-mno-relax)
 endif
 
 extra-y += head.o