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SubjectRe: [PATCH] bootconfig: Fix CONFIG_BOOTTIME_TRACING dependency issue
On Thu, 27 Feb 2020 15:33:44 +0100
Geert Uytterhoeven <geert@linux-m68k.org> wrote:

> Hi Steven,
>
> On Thu, Feb 27, 2020 at 3:25 PM Steven Rostedt <rostedt@goodmis.org> wrote:
> > On Thu, 27 Feb 2020 10:18:08 +0100
> > Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> > > On Tue, Feb 25, 2020 at 4:47 PM Masami Hiramatsu <mhiramat@kernel.org> wrote:
> > > > Since commit d8a953ddde5e ("bootconfig: Set CONFIG_BOOT_CONFIG=n by
> > > > default") also changed the CONFIG_BOOTTIME_TRACING to select
> > > > CONFIG_BOOT_CONFIG to show the boot-time tracing on the menu,
> > > > it introduced wrong dependencies with BLK_DEV_INITRD as below.
> > > >
> > > > WARNING: unmet direct dependencies detected for BOOT_CONFIG
> > > > Depends on [n]: BLK_DEV_INITRD [=n]
> > > > Selected by [y]:
> > > > - BOOTTIME_TRACING [=y] && TRACING_SUPPORT [=y] && FTRACE [=y] && TRACING [=y]
> > > >
> > > > This makes the CONFIG_BOOT_CONFIG selects CONFIG_BLK_DEV_INITRD to
> > > > fix this error and make CONFIG_BOOTTIME_TRACING=n by default, so
> > > > that both boot-time tracing and boot configuration off but those
> > > > appear on the menu list.
> > > >
> > > > Fixes: d8a953ddde5e ("bootconfig: Set CONFIG_BOOT_CONFIG=n by default")
> > > > Reported-by: Randy Dunlap <rdunlap@infradead.org>
> > > > Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
> > > > ---
> > > > init/Kconfig | 2 +-
> > > > kernel/trace/Kconfig | 1 -
> > > > 2 files changed, 1 insertion(+), 2 deletions(-)
> > > >
> > > > diff --git a/init/Kconfig b/init/Kconfig
> > > > index a84e7aa89a29..8b4c3e8c05ea 100644
> > > > --- a/init/Kconfig
> > > > +++ b/init/Kconfig
> > > > @@ -1217,7 +1217,7 @@ endif
> > > >
> > > > config BOOT_CONFIG
> > > > bool "Boot config support"
> > > > - depends on BLK_DEV_INITRD
> > > > + select BLK_DEV_INITRD
> > > > help
> > > > Extra boot config allows system admin to pass a config file as
> > > > complemental extension of kernel cmdline when booting.
> > > > diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
> > > > index 795c3e02d3f1..402eef84c859 100644
> > > > --- a/kernel/trace/Kconfig
> > > > +++ b/kernel/trace/Kconfig
> > > > @@ -145,7 +145,6 @@ config BOOTTIME_TRACING
> > > > bool "Boot-time Tracing support"
> > > > depends on TRACING
> > >
> > > Why not "depends on BLK_DEV_INITRD?" here?
> > >
> > > /me tries to contain the bloat introduced by the bootconfig stuff.
> >
> > Because people like me will be scratching my head trying to figure out why
> > I don't see Boot-time Tracing support ;-)
>
> AFAIUI, without using an initrd, your fancy bootconfig cannot be appended
> anywhere anyway?

Hm, this is a good motivation for me to find a way to append the bootconfig
to kernel image itself. :)

Thank you,

--
Masami Hiramatsu <mhiramat@kernel.org>

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