17fb965d6b
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> SVN-Revision: 45196
55 lines
1.4 KiB
Diff
55 lines
1.4 KiB
Diff
--- a/init/main.c
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+++ b/init/main.c
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@@ -379,6 +379,26 @@ static void __init setup_command_line(ch
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strcpy(static_command_line, command_line);
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}
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+#ifdef CONFIG_MANGLE_BOOTARGS
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+static void __init mangle_bootargs(char *command_line)
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+{
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+ char *rootdev;
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+ char *rootfs;
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+
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+ rootdev = strstr(command_line, "root=/dev/mtdblock");
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+ strncpy(rootdev, "mangled_rootblock=", 18);
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+
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+ rootfs = strstr(command_line, "rootfstype");
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+ strncpy(rootfs, "mangled_fs", 10);
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+
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+}
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+#else
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+static void __init mangle_bootargs(char *command_line)
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+{
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+}
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+#endif
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+
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+
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/*
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* We need to finalize in a non-__init function or else race conditions
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* between the root thread and the init thread may cause start_kernel to
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@@ -530,6 +550,7 @@ asmlinkage __visible void __init start_k
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pr_notice("%s", linux_banner);
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setup_arch(&command_line);
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mm_init_cpumask(&init_mm);
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+ mangle_bootargs(command_line);
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setup_command_line(command_line);
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setup_nr_cpu_ids();
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setup_per_cpu_areas();
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--- a/init/Kconfig
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+++ b/init/Kconfig
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@@ -1597,6 +1597,15 @@ config EMBEDDED
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an embedded system so certain expert options are available
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for configuration.
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+config MANGLE_BOOTARGS
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+ bool "Rename offending bootargs"
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+ depends on EXPERT
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+ help
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+ Sometimes the bootloader passed bogus root= and rootfstype=
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+ parameters to the kernel, and while you want to ignore them,
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+ you need to know the values f.e. to support dual firmware
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+ layouts on the flash.
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+
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config HAVE_PERF_EVENTS
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bool
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help
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