linux-kernel - Re: [PATCH] kbuild: simplify access to the kernel's version

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Date:   Fri, 12 Feb 2021 12:40:08 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Sasha Levin <sashal@...nel.org>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH] kbuild: simplify access to the kernel's version

On Fri, Feb 12, 2021 at 5:18 AM Masahiro Yamada <masahiroy@...nel.org> wrote:
>
> On Tue, Feb 9, 2021 at 3:20 AM Sasha Levin <sashal@...nel.org> wrote:
> >
> > On Mon, Feb 08, 2021 at 05:50:07PM +0000, Christoph Hellwig wrote:
> > >On Sun, Feb 07, 2021 at 11:13:52AM -0500, Sasha Levin wrote:
> > >> +            (u8)(LINUX_VERSION_MAJOR), (u8)(LINUX_VERSION_PATCHLEVEL),
> > >> +            (u16)(LINUX_VERSION_SUBLEVEL));
> > >
> > >No need for the casts and braces.
> > >
>
>
> I agree.
>
> Shall I remove the casts when I apply this?
>
>
>
>
> > >Otherwise this looks good, but please also kill off KERNEL_VERSION
> > >and LINUX_KERNEL_VERSION entirely while you're at it.
> >
> > I don't think there are in-tree users left?
> >
> > We can't remove it completely because userspace is still using it, so if
> > we drop those userspace will be sad.
>
>
> Right.
> Once we export a macros to userspace, we cannot remove it.
>
>
>
>
>
> > --
> > Thanks,
> > Sasha
>
>
>
> --
> Best Regards
> Masahiro Yamada





Wait, this patch does not work.
None of the submitter or reviewers
tested this patch... Sigh.


masahiro@...ver:~/workspace/linux-kbuild$ make
Makefile:1249: *** missing 'endef', unterminated 'define'.  Stop.







diff --git a/Makefile b/Makefile
index ef81c8895abf..1fdd44fe1659 100644
--- a/Makefile
+++ b/Makefile
@@ -1258,7 +1258,7 @@ define filechk_version.h
        ((c) > 255 ? 255 : (c)))';                                       \
        echo \#define LINUX_VERSION_MAJOR $(VERSION);                    \
        echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL);            \
-       echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL);                \
+       echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL)
 endef

 $(version_h): FORCE





-- 
Best Regards
Masahiro Yamada