From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <544AD829.206@gmail.com> Date: Sat, 25 Oct 2014 06:52:25 +0800 From: Chen Gang MIME-Version: 1.0 References: <542FF203.50907@gmail.com> In-Reply-To: <542FF203.50907@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Subject: Re: [PATCH] um: kernel: ksyms: Export symbol syscall() for fixing modpost issue To: richard@nod.at, jdike@addtoit.com Cc: user-mode-linux-devel@lists.sourceforge.net, user-mode-linux-user@lists.sourceforge.net, linux-kernel@vger.kernel.org List-ID: Hello Maintainers: Please help check this patch, when you have time. Thanks. On 10/4/14 21:11, Chen Gang wrote: > syscall() is implemented in libc.so/a (e.g. for glibc, in "syscall.o"), > so for normal ".o" files, it is undefined, neither can be found within > kernel wide, so will break modpost. > > Since ".o" files is OK, can simply export 'syscall' symbol, let modpost > know about that, then can fix this issue. > > The related error (with allmodconfig under um): > > MODPOST 1205 modules > ERROR: "syscall" [fs/hostfs/hostfs.ko] undefined! > > Signed-off-by: Chen Gang > --- > arch/um/kernel/ksyms.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/arch/um/kernel/ksyms.c b/arch/um/kernel/ksyms.c > index 543c047..e7780f3 100644 > --- a/arch/um/kernel/ksyms.c > +++ b/arch/um/kernel/ksyms.c > @@ -42,3 +42,6 @@ EXPORT_SYMBOL(os_makedev); > EXPORT_SYMBOL(add_sigio_fd); > EXPORT_SYMBOL(ignore_sigio_fd); > EXPORT_SYMBOL(sigio_broken); > + > +extern long int syscall (long int __sysno, ...); > +EXPORT_SYMBOL(syscall); > -- Chen Gang Open, share, and attitude like air, water, and life which God blessed