commit a791b1565f828f926a54f1f5a612890ce0f00e6f
author Chen Gang <gang.chen.5i5j@gmail.com> Sat Oct 04 21:11:31 2014 +0800
committer Richard Weinberger <richard@nod.at> Sun May 31 13:14:07 2015 +0200
tree 0272f80d386be7a793ddc5e36402ed991c2987f6
parent 5f32943b5e9a48bf3269430e1a7a210411e0cc98

um: kernel: ksyms: Export symbol syscall() for fixing modpost issue

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@gmail.com>
Signed-off-by: Richard Weinberger <richard@nod.at>