From f7794a4d92ade518c813de69a01b27ca6d8d86f3 Mon Sep 17 00:00:00 2001 From: Ming Wang Date: Wed, 20 Aug 2025 22:23:16 +0800 Subject: [PATCH] LoongArch: Increase COMMAND_LINE_SIZE up to 4096 The default COMMAND_LINE_SIZE of 512, inherited from asm-generic, is too small for modern use cases. For example, kdump configurations or extensive debugging parameters can easily exceed this limit. Therefore, increase the command line size to 4096 bytes, aligning LoongArch with the MIPS architecture. This change follows a broader trend among architectures to raise this limit to support modern needs; for instance, PowerPC increased its value for similar reasons in the commit a5980d064fe2 ("powerpc: Bump COMMAND_LINE_SIZE to 2048"). Similar to the change made for RISC-V in the commit 61fc1ee8be26 ("riscv: Bump COMMAND_LINE_SIZE value to 1024"), this is considered a safe change. The broader kernel community has reached a consensus that modifying COMMAND_LINE_SIZE from UAPI headers does not constitute a uABI breakage, as well-behaved userspace applications should not rely on this macro. Suggested-by: Huang Cun Signed-off-by: Ming Wang Signed-off-by: Huacai Chen --- arch/loongarch/include/uapi/asm/setup.h | 8 ++++++++ 1 file changed, 8 insertions(+) create mode 100644 arch/loongarch/include/uapi/asm/setup.h diff --git a/arch/loongarch/include/uapi/asm/setup.h b/arch/loongarch/include/uapi/asm/setup.h new file mode 100644 index 000000000000..d46363ce3e02 --- /dev/null +++ b/arch/loongarch/include/uapi/asm/setup.h @@ -0,0 +1,8 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ + +#ifndef _UAPI_ASM_LOONGARCH_SETUP_H +#define _UAPI_ASM_LOONGARCH_SETUP_H + +#define COMMAND_LINE_SIZE 4096 + +#endif /* _UAPI_ASM_LOONGARCH_SETUP_H */ -- 2.25.1