# Re: \[-next\] ERROR: "epapr\_hypercall\_start" \[drivers/tty/ehv\_bytechan.ko\] undefined!

- From: Michael Ellerman \<hidden\>
- Date: 2012-08-10 08:58:57 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2012/08/8898826
- Thread: https://ratatoskr.run/linuxppc-dev/2012/08/8898825/t.md

```text
On Fri, 2012-08-10 at 09:43 +0200, Geert Uytterhoeven wrote:
> Sicne a few days, powerpc allmodconfig fails with:
> 
> ERROR: "epapr_hypercall_start" [drivers/tty/ehv_bytechan.ko] undefined!
> make[2]: *** [__modpost] Error 1
> make[1]: *** [modules] Error 2
> 
> http://kisskb.ellerman.id.au/kisskb/buildresult/6883300/


Yep, modular build is broken.

Since this commit by the looks of it:

commit 6d2d82627f4f1e96a33664ace494fa363e0495cb
Author: Liu Yu-B13201 [ref]
Date:   Tue Jul 3 05:48:56 2012 +0000

    PPC: Don't use hardcoded opcode for ePAPR hcall invocation
    
    Signed-off-by: Liu Yu [ref]
    Signed-off-by: Stuart Yoder [ref]
    Signed-off-by: Alexander Graf [ref]



cheers
```