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Date:   Thu, 14 Jan 2021 11:58:11 +0000
From:   Mark Rutland <mark.rutland@arm.com>
To:     kernel test robot <lkp@intel.com>
Cc:     kbuild-all@lists.01.org, linux-kernel@vger.kernel.org,
        Will Deacon <will@kernel.org>,
        Anshuman Khandual <anshuman.khandual@arm.com>
Subject: Re: arch/arm64/kernel/syscall.c:164:6: warning: no previous
 prototype for 'do_el0_svc_compat'
Message-ID: <20210114115811.GC2739@C02TD0UTHF1T.local>
References: <202101141046.n8iPO3mw-lkp@intel.com>
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On Thu, Jan 14, 2021 at 10:41:59AM +0800, kernel test robot wrote:
> All warnings (new ones prefixed by >>):
> 
>    arch/arm64/kernel/syscall.c:157:6: warning: no previous prototype for 'do_el0_svc' [-Wmissing-prototypes]
>      157 | void do_el0_svc(struct pt_regs *regs)
>          |      ^~~~~~~~~~
> >> arch/arm64/kernel/syscall.c:164:6: warning: no previous prototype for 'do_el0_svc_compat' [-Wmissing-prototypes]
>      164 | void do_el0_svc_compat(struct pt_regs *regs)
>          |      ^~~~~~~~~~~~~~~~~

Looks like this is down to syscall.c not including <asm/exception.h>,
since do_el0_svc_compat() has a prototype there.

I'll spin a patch...

Mark.