Re: [PATCH v3 01/17] cmdline: Add generic function to build command line.
From: Daniel Walker <hidden>
Date: 2021-03-30 17:28:21
Also in:
linux-arch, linux-arm-kernel, linux-mips, linux-riscv, linux-sh, linuxppc-dev, lkml, sparclinux
On Fri, Mar 26, 2021 at 01:44:48PM +0000, Christophe Leroy wrote:
quoted hunk ↗ jump to hunk
This code provides architectures with a way to build command line based on what is built in the kernel and what is handed over by the bootloader, based on selected compile-time options. Signed-off-by: Christophe Leroy <redacted> --- v3: - Addressed comments from Will - Added capability to have src == dst --- include/linux/cmdline.h | 57 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 include/linux/cmdline.hdiff --git a/include/linux/cmdline.h b/include/linux/cmdline.h new file mode 100644 index 000000000000..dea87edd41be --- /dev/null +++ b/include/linux/cmdline.h@@ -0,0 +1,57 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_CMDLINE_H +#define _LINUX_CMDLINE_H + +#include <linux/string.h> + +/* Allow architectures to override strlcat, powerpc can't use strings so early */ +#ifndef cmdline_strlcat +#define cmdline_strlcat strlcat +#endif + +/* + * This function will append or prepend a builtin command line to the command + * line provided by the bootloader. Kconfig options can be used to alter + * the behavior of this builtin command line. + * @dst: The destination of the final appended/prepended string. + * @src: The starting string or NULL if there isn't one. + * @len: the length of dest buffer. + */
Append or prepend ? Cisco requires both at the same time. This is why my implementation provides both. I can't use this with both at once. Daniel