From 716ca530e1c4515d8683c9d5be3d56b301758b66 Mon Sep 17 00:00:00 2001
From: James <>
Date: Wed, 4 Nov 2015 11:49:21 +0000
Subject: trunk-47381

---
 .../generic/patches-4.3/995-mangle_bootargs.patch  | 58 ++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 target/linux/generic/patches-4.3/995-mangle_bootargs.patch

(limited to 'target/linux/generic/patches-4.3/995-mangle_bootargs.patch')

diff --git a/target/linux/generic/patches-4.3/995-mangle_bootargs.patch b/target/linux/generic/patches-4.3/995-mangle_bootargs.patch
new file mode 100644
index 0000000..eb52561
--- /dev/null
+++ b/target/linux/generic/patches-4.3/995-mangle_bootargs.patch
@@ -0,0 +1,58 @@
+--- a/init/main.c
++++ b/init/main.c
+@@ -355,6 +355,29 @@ 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
+@@ -527,6 +550,7 @@ asmlinkage __visible void __init start_k
+ 	pr_notice("%s", linux_banner);
+ 	setup_arch(&command_line);
+ 	mm_init_cpumask(&init_mm);
++	mangle_bootargs(command_line);
+ 	setup_command_line(command_line);
+ 	setup_nr_cpu_ids();
+ 	setup_per_cpu_areas();
+--- a/init/Kconfig
++++ b/init/Kconfig
+@@ -1638,6 +1638,15 @@ 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
-- 
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