On Wed, Oct 15, 2014 at 10:14:31AM +0800, WANG Chao wrote: > On 10/14/14 at 05:52pm, Vivek Goyal wrote: > > On Tue, Oct 14, 2014 at 12:46:58PM +0800, WANG Chao wrote: > > > Supress this unnecessary message during kernel re-build > > > (CONFIG_KEXEC_FILE=y): > > > > > > make[1]: `arch/x86/purgatory/kexec-purgatory.c' is up to date. > > > > > > Signed-off-by: WANG Chao <chaow...@redhat.com> > > > --- > > > arch/x86/purgatory/Makefile | 1 + > > > 1 file changed, 1 insertion(+) > > > > > > diff --git a/arch/x86/purgatory/Makefile b/arch/x86/purgatory/Makefile > > > index f52e033..2c835e3 100644 > > > --- a/arch/x86/purgatory/Makefile > > > +++ b/arch/x86/purgatory/Makefile > > > @@ -24,6 +24,7 @@ quiet_cmd_bin2c = BIN2C $@ > > > > > > $(obj)/kexec-purgatory.c: $(obj)/purgatory.ro FORCE > > > $(call if_changed,bin2c) > > > + @: > > > > Where can I find the description of "@:" and how does it work? > > @ is used to suppress echo'ing. See: > https://www.gnu.org/software/make/manual/html_node/Echoing.html > > This is a trick to avoid "... is up to date" message". Check out commit > a9358bc ("x86/build: Supress realmode.bin is up to date message").
Thanks for the explanations. Looks good to me. Acked-by: Vivek Goyal <vgo...@redhat.com> Vivek -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
