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authorMasami Hiramatsu <mhiramat@kernel.org>2020-02-20 21:18:42 +0900
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2020-02-20 17:52:34 -0500
commit85c46b78da58398be1c5166f55063c0512decd39 (patch)
tree61c46743c7f5dd9eaec9afa135020da8b5e66d04 /init/Kconfig
parentd8a953ddde5ec30a36810d0a892c3949b50849e9 (diff)
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bootconfig: Add bootconfig magic word for indicating bootconfig explicitly
Add bootconfig magic word to the end of bootconfig on initrd image for indicating explicitly the bootconfig is there. Also tools/bootconfig treats wrong size or wrong checksum or parse error as an error, because if there is a bootconfig magic word, there must be a bootconfig. The bootconfig magic word is "#BOOTCONFIG\n", 12 bytes word. Thus the block image of the initrd file with bootconfig is as follows. [Initrd][bootconfig][size][csum][#BOOTCONFIG\n] Link: http://lkml.kernel.org/r/158220112263.26565.3944814205960612841.stgit@devnote2 Suggested-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'init/Kconfig')
-rw-r--r--init/Kconfig2
1 files changed, 1 insertions, 1 deletions
diff --git a/init/Kconfig b/init/Kconfig
index f586878410d2..a84e7aa89a29 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1222,7 +1222,7 @@ config BOOT_CONFIG
Extra boot config allows system admin to pass a config file as
complemental extension of kernel cmdline when booting.
The boot config file must be attached at the end of initramfs
- with checksum and size.
+ with checksum, size and magic word.
See <file:Documentation/admin-guide/bootconfig.rst> for details.
If unsure, say Y.