Re: [PATCH] um: kernel: ksyms: Export symbol syscall() for fixing modpost issue

From: Chen Gang
Date: Fri Oct 24 2014 - 18:46:30 EST


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 <gang.chen.5i5j@xxxxxxxxx>
> ---
> 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
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