linux-kernel - [PATCH v1] RISC-V: define RUNTIME_DISCARD

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Message-Id: <20230102124936.1363533-1-conor@kernel.org>
Date:   Mon,  2 Jan 2023 12:49:37 +0000
From:   Conor Dooley <conor@...nel.org>
To:     palmer@...belt.com
Cc:     conor@...nel.org, Conor Dooley <conor.dooley@...rochip.com>,
        masahiroy@...nel.org, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v1] RISC-V: define RUNTIME_DISCARD_EXIT

From: Conor Dooley <conor.dooley@...rochip.com>

Masahiro noted:
> arch/riscv/kernel/vmlinux.lds.S clearly says:
> /* we have to discard exit text and such at runtime, not link time */
> [...]
> so riscv should define RUNTIME_DISCARD_EXIT like x86, arm64.

As things stand, no ill comes of this - but if "DISCARDS" was to be
re-ordered in the linker script, linking would fail.
Do as suggested by Masahiro and define RUNTIME_DISCARD_EXIT.

Link: https://lore.kernel.org/all/CAK7LNAT39aZEw=0209ovYZ2kxtOaA2a51=XD9=LqYHjkTOEK4g@mail.gmail.com/
Suggested-by: Masahiro Yamada <masahiroy@...nel.org>
Signed-off-by: Conor Dooley <conor.dooley@...rochip.com>
---
 arch/riscv/kernel/vmlinux.lds.S | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/riscv/kernel/vmlinux.lds.S b/arch/riscv/kernel/vmlinux.lds.S
index 4e6c88aa4d87..07c19f2a288c 100644
--- a/arch/riscv/kernel/vmlinux.lds.S
+++ b/arch/riscv/kernel/vmlinux.lds.S
@@ -5,6 +5,7 @@
  */
 
 #define RO_EXCEPTION_TABLE_ALIGN	4
+#define RUNTIME_DISCARD_EXIT
 
 #ifdef CONFIG_XIP_KERNEL
 #include "vmlinux-xip.lds.S"
-- 
2.39.0