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List:       linux-sparc
Subject:    Re: [RFC][PATCH v3 1/5] sparc64: Fix asm/percpu.h build error
From:       David Miller <davem () davemloft ! net>
Date:       2020-05-29 23:29:17
Message-ID: 20200529.162917.1970892823680223252.davem () davemloft ! net
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From: Peter Zijlstra <peterz@infradead.org>
Date: Fri, 29 May 2020 23:35:51 +0200

> ../arch/sparc/include/asm/percpu_64.h:7:24: warning: call-clobbered register used \
> for global register variable register unsigned long __local_per_cpu_offset \
> asm("g5");

The "-ffixed-g5" option on the command line tells gcc that we are
using 'g5' as a fixed register, so some part of your build isn't using
the:

KBUILD_CFLAGS += -ffixed-g4 -ffixed-g5 -fcall-used-g7 -Wno-sign-compare

from arch/sparc/Makefile for some reason.


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