lkml.org 
[lkml]   [2020]   [May]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: next-20200528 - build error in kernel/rcu/refperf.c
From
Date
On 5/28/20 9:16 PM, Valdis Klētnieks wrote:
> commit 9088b449814f788d24f35a5840b6b2c2a23cd32a
> Author: Paul E. McKenney <paulmck@kernel.org>
> Date: Mon May 25 17:22:24 2020 -0700
>
> refperf: Provide module parameter to specify number of experiments
>
> changes this line of code (line 389)
>
> - reader_tasks[exp].result_avg = 1000 * process_durations(exp) / ((exp + 1) * loops);
> + result_avg[exp] = 1000 * process_durations(nreaders) / (nreaders * loops);
>
> On a 32-bit ARM make allmodconfig with gcc 8.3, this results in:
>
> ERROR: modpost: "__aeabi_uldivmod" [kernel/rcu/refperf.ko] undefined!
> make[1]: *** [scripts/Makefile.modpost:103: __modpost] Error 1
>
> I admit not understanding why the original line of code worked and the new one doesn't.
> Maybe gcc is smarter/dumber about the ranges of 'exp' and 'nreaders' than we thought?
>

Paul has already responded: (unfortunately)

"So I am restricting to 64BIT for the time being. Yeah, I know, lazy of
me. ;-)"

https://lore.kernel.org/lkml/20200528180855.GP2869@paulmck-ThinkPad-P72/

--
~Randy

\
 
 \ /
  Last update: 2020-05-29 06:49    [W:0.084 / U:0.548 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site