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Date: Mon, 14 Jul 2008 15:29:46 -0700 From: Daniel Guilak <guilak@...ux.vnet.ibm.com> To: Randy Dunlap <randy.dunlap@...cle.com> Cc: linux-kernel@...r.kernel.org, trivial@...nel.org, akpm@...ux-foundation.org, torvalds@...ux-foundation.org, daniel@...ielguilak.com Subject: Re: [PATCH] init/version.c: Define version_string only if CONFIG_KALLSYMS is not defined. On Mon, 2008-07-14 at 15:07 -0700, Randy Dunlap wrote: > 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@...ielguilak.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. Sorry about that, I should have been a bit more clear with it. Next time I'll make sure to state that in the subject line. I stated the dependency right before the diff message. > > > 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. Yes, that's exactly the idea behind it. --Daniel -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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