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    SubjectRe: [PATCH] init: Introduce rootdir bootparm to select which dir to sys_chroot
    > On Tue, 6 Nov 2007 13:40:26 +0300 Al Boldi <a1426z@gawab.com> wrote:
    >
    > This patch introduces a rootdir kernel boot parameter, which specifies the
    > path to the kernel sys_chroot boot dir.
    >
    > This is useful for systems that have more than one distribution installed on
    > the same fs/partition.
    >
    >
    > Cc: H. Peter Anvin <hpa@zytor.com>
    > Cc: Andrew Morton <akpm@linux-foundation.org>
    > Signed-off-by: Al Boldi <a1426z@gawab.com>
    >
    > ---
    >
    > --- a/init/do_mounts.c
    > +++ b/init/do_mounts.c
    > @@ -252,6 +252,15 @@ __setup("rootflags=", root_data_setup);
    > __setup("rootfstype=", fs_names_setup);
    > __setup("rootdelay=", root_delay_setup);
    >
    > +static char * __initdata root_dir;
    > +static int __init root_dir_setup(char *str)
    > +{
    > + root_dir = strcat("./",str);
    > + return 1;
    > +}
    > +
    > +__setup("rootdir=", root_dir_setup);

    Please update Documentation/kernel-parameters.txt when adding __setup
    options.

    > static void __init get_fs_names(char *page)
    > {
    > char *s = page;
    > @@ -469,6 +478,10 @@ void __init prepare_namespace(void)
    > mount_root();
    > out:
    > sys_mount(".", "/", NULL, MS_MOVE, NULL);
    > +
    > + if(root_dir)
    > + sys_chdir(root_dir);
    > +

    Please run scripts/checkpatch.pl across all patches before sending them to
    anyone.

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