openwrt/target/linux/generic/pending-6.1/920-mangle_bootargs.patch
John Audia 2bda536a3d
kernel: bump 6.1 to 6.1.53
Changelog: https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.53

Removed upstreamed:
	bcm53xx/patches-6.1/032-v6.6-0005-ARM-dts-BCM53573-Drop-nonexistent-usb-cells.patch[1]
	bcm53xx/patches-6.1/032-v6.6-0006-ARM-dts-BCM53573-Add-cells-sizes-to-PCIe-node.patch[2]
	bcm53xx/patches-6.1/032-v6.6-0007-ARM-dts-BCM53573-Use-updated-spi-gpio-binding-proper.patch[3]
	bcm53xx/patches-6.1/032-v6.6-0011-ARM-dts-BCM53573-Fix-Tenda-AC9-switch-CPU-port.patch[4]

All other patches automatically rebased.

Build system: x86/64
Build-tested: x86/64/AMD Cezanne
Run-tested: x86/64/AMD Cezanne

1. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.1.53&id=ee1d740374aa73fb32857685eb05167ad87458cf
2. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.1.53&id=ab5154ae26c446136827451e907db45d7b92a76f
3. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.1.53&id=f5ff6897094fa161be55786cb9e5d5b1bf7a9049
4. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.1.53&id=0ef736fec61422794c4a991d46c4ec212b01d8d1

Signed-off-by: John Audia <therealgraysky@proton.me>
2023-09-23 13:10:28 +02:00

72 lines
1.9 KiB
Diff

From: Imre Kaloz <kaloz@openwrt.org>
Subject: init: add CONFIG_MANGLE_BOOTARGS and disable it by default
Enabling this option renames the bootloader supplied root=
and rootfstype= variables, which might have to be know but
would break the automatisms OpenWrt uses.
Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
---
init/Kconfig | 9 +++++++++
init/main.c | 24 ++++++++++++++++++++++++
2 files changed, 33 insertions(+)
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1827,6 +1827,15 @@ config EMBEDDED
an embedded system so certain expert options are available
for configuration.
+config MANGLE_BOOTARGS
+ bool "Rename offending bootargs"
+ depends on EXPERT
+ help
+ Sometimes the bootloader passed bogus root= and rootfstype=
+ parameters to the kernel, and while you want to ignore them,
+ you need to know the values f.e. to support dual firmware
+ layouts on the flash.
+
config HAVE_PERF_EVENTS
bool
help
--- a/init/main.c
+++ b/init/main.c
@@ -607,6 +607,29 @@ static inline void setup_nr_cpu_ids(void
static inline void smp_prepare_cpus(unsigned int maxcpus) { }
#endif
+#ifdef CONFIG_MANGLE_BOOTARGS
+static void __init mangle_bootargs(char *command_line)
+{
+ char *rootdev;
+ char *rootfs;
+
+ rootdev = strstr(command_line, "root=/dev/mtdblock");
+
+ if (rootdev)
+ strncpy(rootdev, "mangled_rootblock=", 18);
+
+ rootfs = strstr(command_line, "rootfstype");
+
+ if (rootfs)
+ strncpy(rootfs, "mangled_fs", 10);
+
+}
+#else
+static void __init mangle_bootargs(char *command_line)
+{
+}
+#endif
+
/*
* We need to store the untouched command line for future reference.
* We also need to store the touched command line since the parameter
@@ -954,6 +977,7 @@ asmlinkage __visible void __init __no_sa
pr_notice("%s", linux_banner);
early_security_init();
setup_arch(&command_line);
+ mangle_bootargs(command_line);
setup_boot_config();
setup_command_line(command_line);
setup_nr_cpu_ids();