linux-kernel - next-20170220 failed to build on PowerPC

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Date:   Mon, 20 Feb 2017 16:25:32 +0530
From:   abdul <abdhalee@...ux.vnet.ibm.com>
To:     linuxppc-dev@...ts.ozlabs.org
Cc:     linux-kernel@...r.kernel.org, mpe@...erman.id,
        aneesh.kumar@...ux.vnet.ibm.com, fbarrat@...ux.vnet.ibm.com
Subject: next-20170220 failed to build on PowerPC

Hi,

next-20170220 fails to build on Power 8 (PowerVM LPAR) with these errors.

with same config, next-20170215 builds fine.

the config file used is attached, by default 
CONFIG_VIRT_CPU_ACCOUNTING_NATIVE was not set.

(X) Simple tick based cputime accounting
( ) Deterministic task and CPU time accounting
( ) Full dynticks CPU time accounting

arch/powerpc/kernel/time.c: In function ‘running_clock’:
arch/powerpc/kernel/time.c:712:25: error: implicit declaration of function ‘cputime_to_nsecs’ [-Werror=implicit-function-declaration]
    return local_clock() - cputime_to_nsecs(kcpustat_this_cpu->cpustat[CPUTIME_STEAL]);
			  ^
cc1: all warnings being treated as errors
make[1]: *** [arch/powerpc/kernel/time.o] Error 1
make[1]: *** Waiting for unfinished jobs....,

Note*: Problem is not seen when CONFIG_VIRT_CPU_ACCOUNTING_NATIVE is 
enabled i.e

( ) Simple tick based cputime accounting
(X) Deterministic task and CPU time accounting
( ) Full dynticks CPU time accounting

Regard's
Abdul Haleem
IBM Linux Technology Center.



View attachment "Tul-vm-config" of type "text/plain" (187077 bytes)