linux-kernel - Re: [PATCH] arm64: Fix compilation error while accessing MPIDR_HWID

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Message-ID: <20180219121313.lltye3g464zzt7z3@armageddon.cambridge.arm.com>
Date:   Mon, 19 Feb 2018 12:13:14 +0000
From:   Catalin Marinas <catalin.marinas@....com>
To:     Will Deacon <will.deacon@....com>
Cc:     John Garry <john.garry@...wei.com>,
        Bhupesh Sharma <bhsharma@...hat.com>, bhupesh.linux@...il.com,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] arm64: Fix compilation error while accessing
 MPIDR_HWID_BITMASK from .S files

On Mon, Feb 19, 2018 at 11:19:07AM +0000, Will Deacon wrote:
> > >>On 19/02/2018 06:39, Bhupesh Sharma wrote:
> > >>>Since commit e1a50de37860b3a93a9d643b09638db5aff47650 (arm64: cputype:
> > >>>Silence Sparse warnings), compilation of arm64 architecture is broken
> > >>>with the following error messages:
> > >>>
> > >>> AR      arch/arm64/kernel/built-in.o
> > >>> arch/arm64/kernel/head.S: Assembler messages:
> > >>> arch/arm64/kernel/head.S:677: Error: found 'L', expected: ')'
> > >>> arch/arm64/kernel/head.S:677: Error: found 'L', expected: ')'
> > >>> arch/arm64/kernel/head.S:677: Error: found 'L', expected: ')'
> > >>> arch/arm64/kernel/head.S:677: Error: junk at end of line, first
> > >>> unrecognized character is `L'
> > >>> arch/arm64/kernel/head.S:677: Error: unexpected characters following
> > >>> instruction at operand 2 -- `movz x1,:abs_g1_s:0xff00ffffffUL'
> > >>> arch/arm64/kernel/head.S:677: Error: unexpected characters following
> > >>> instruction at operand 2 -- `movk x1,:abs_g0_nc:0xff00ffffffUL'
> > >>>
> > >>>This patch fixes the same by using the UL() macro correctly for
> > >>>assigning the MPIDR_HWID_BITMASK macro value.
> > >>>
> > >>>Signed-off-by: Bhupesh Sharma <bhsharma@...hat.com>
[...]
> Thanks for the clarification; Catalin -- can you pick this up for -rc3 please?

Done. Strange that it builds fine with newer toolchains.

-- 
Catalin