openwrt/target/linux/ipq806x/patches-6.1/900-arm-add-cmdline-override.patch
John Audia 79a82d7e87 kernel: bump 6.1 to 6.1.37
Manually rebased:
	generic/hack-6.1/220-arm-gc_sections.patch
	armsr/patches-6.1/221-armsr-disable_gc_sections_armv7.patch

All other patches automatically rebased.

Signed-off-by: John Audia <therealgraysky@proton.me>
2023-07-05 20:32:37 +02:00

38 lines
1.2 KiB
Diff

--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1600,6 +1600,14 @@ config ARM_ATAG_DTB_COMPAT_CMDLINE_MANGL
endchoice
+config CMDLINE_OVERRIDE
+ bool "Use alternative cmdline from device tree"
+ help
+ Some bootloaders may have uneditable bootargs. While CMDLINE_FORCE can
+ be used, this is not a good option for kernels that are shared across
+ devices. This setting enables using "chosen/cmdline-override" as the
+ cmdline if it exists in the device tree.
+
config CMDLINE
string "Default kernel command string"
default ""
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -1187,6 +1187,17 @@ int __init early_init_dt_scan_chosen(cha
if (p != NULL && l > 0)
strlcat(cmdline, p, min_t(int, strlen(cmdline) + (int)l, COMMAND_LINE_SIZE));
+ /* CONFIG_CMDLINE_OVERRIDE is used to fallback to a different
+ * device tree option of chosen/bootargs-override. This is
+ * helpful on boards where u-boot sets bootargs, and is unable
+ * to be modified.
+ */
+#ifdef CONFIG_CMDLINE_OVERRIDE
+ p = of_get_flat_dt_prop(node, "bootargs-override", &l);
+ if (p != NULL && l > 0)
+ strlcpy(cmdline, p, min((int)l, COMMAND_LINE_SIZE));
+#endif
+
handle_cmdline:
/*
* CONFIG_CMDLINE is meant to be a default in case nothing else