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    Subject[RFC 06/18] init: Add liveupdate cmdline param
    Date
    This will allow other subsystems to know when we're going a LU and hence
    when they should be restoring rather than reinitialising state.
    ---
    include/linux/init.h | 1 +
    init/main.c | 10 ++++++++++
    2 files changed, 11 insertions(+)

    diff --git a/include/linux/init.h b/include/linux/init.h
    index 266c3e1640d4..d7c68c7bfaf0 100644
    --- a/include/linux/init.h
    +++ b/include/linux/init.h
    @@ -146,6 +146,7 @@ extern int do_one_initcall(initcall_t fn);
    extern char __initdata boot_command_line[];
    extern char *saved_command_line;
    extern unsigned int saved_command_line_len;
    +extern bool liveupdate;
    extern unsigned int reset_devices;

    /* used by init/main.c */
    diff --git a/init/main.c b/init/main.c
    index e24b0780fdff..7807a56c3473 100644
    --- a/init/main.c
    +++ b/init/main.c
    @@ -165,6 +165,16 @@ static char *ramdisk_execute_command = "/init";
    bool static_key_initialized __read_mostly;
    EXPORT_SYMBOL_GPL(static_key_initialized);

    +bool liveupdate __read_mostly;
    +EXPORT_SYMBOL(liveupdate);
    +
    +static int __init set_liveupdate(char *param)
    +{
    + liveupdate = true;
    + return 0;
    +}
    +early_param("liveupdate", set_liveupdate);
    +
    /*
    * If set, this is an indication to the drivers that reset the underlying
    * device before going ahead with the initialization otherwise driver might
    --
    2.40.1

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