Messages in this thread | | | Date | Mon, 14 Jul 2008 15:07:31 -0700 | From | Randy Dunlap <> | Subject | Re: [PATCH] init/version.c: Define version_string only if CONFIG_KALLSYMS is not defined. |
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On Mon, 14 Jul 2008 14:20:38 -0700 Daniel Guilak wrote:
> On Mon, 2008-07-14 at 12:38 -0700, Randy Dunlap wrote: > > On Mon, 14 Jul 2008 12:04:46 -0700 Daniel Guilak wrote: > > > > > int Version_* is only used with ksymoops, which is only needed (according to > > > README and Documentation/Changes) if CONFIG_KALLSYMS is NOT defined. Therefore > > > this patch defines version_string only if CONFIG_KALLSYMS is not defined. > > > > > > Signed-off-by: Daniel Guilak <daniel@danielguilak.com> > > > --- > > > init/version.c | 2 ++ > > > 1 files changed, 2 insertions(+), 0 deletions(-) > > > > > > Depends on "[PATCH] init/version.c: Silenced sparse warning by declaring the version string." > > > > > > diff --git a/init/version.c b/init/version.c > > > index 041fd82..52a8b98 100644 > > > --- a/init/version.c > > > +++ b/init/version.c > > > @@ -13,11 +13,13 @@ > > > #include <linux/utsrelease.h> > > > #include <linux/version.h> > > > > > > +#ifndef CONFIG_KALLSYMS > > > #define version(a) Version_ ## a > > > #define version_string(a) version(a) > > > > > > extern int version_string(LINUX_VERSION_CODE); > > > int version_string(LINUX_VERSION_CODE); > > > +#endif > > > > > > struct uts_namespace init_uts_ns = { > > > .kref = { > > > -- > > > > Does not apply cleanly to linux-2.6.26, linux-next-20080714, or Linus-git-head. > > > > Did you apply "[PATCH] init/version.c: Silenced sparse warning by > declaring the version string." beforehand? I just applied it on the most > recent tree and I didn't have any issues.
Clearly I didn't apply that patch. I missed anything saying that this was patch 2/2 in a dependent series.
> > and why do we ned both extern int version_string() > > and int version_string() ? > Because sparse was complaining that it wasn't prototyped or static. > There isn't a header file to put it in since it only exists to be a > kernel.
so the extern makes it be published in the symbol table, whereas a static would keep it private. Is that correct?
and the second line (int version_string(LINUX_VERSION_CODE)) actually defines it.
--- ~Randy Linux Plumbers Conference, 17-19 September 2008, Portland, Oregon USA http://linuxplumbersconf.org/
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