openwrt-mirror/target/linux/generic/pending-6.6/920-mangle_bootargs.patch
Zxl hhyccc d1d8febc42 kernel: bump 6.6 to 6.6.113
https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.113

Manually rebased:

/target/linux/generic/backport-6.6/540-v6.12-ksmbd-browse-interfaces-list-on-FSCTL_QUERY_INTERFACE_INFO.patch

Dropped patch

/target/linux/generic/backport-6.6/541-v6.18-ksmbd-add-max-ip-connections-parameter.patch

merged upstream with commit:  https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-6.6.y&id=bc718d0bd87e372f7786c0239e340f3577ac94fa

All other patches automatically rebased.

Build system: bcm4908
Build system: bcm53xx

Signed-off-by: Zxl hhyccc <zxlhhy@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/20434
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
2025-10-25 01:14:11 +02:00

72 lines
1.8 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
@@ -1821,6 +1821,15 @@ config DEBUG_RSEQ
If unsure, say N.
+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
@@ -620,6 +620,29 @@ 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
@@ -909,6 +932,7 @@ void start_kernel(void)
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();