Re: [PATCH 1/2] lib/mpi: avoid assembler warning

From	Herbert Xu <herbert@gondor.apana.org.au>
Newsgroups	linux.kernel
Subject	Re: [PATCH 1/2] lib/mpi: avoid assembler warning
Date	2016-02-27 20:40 +0100
Message-ID	<r6SSB-7LP-5@gated-at.bofh.it> (permalink)
References	<r6q0i-3i6-7@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Fri, Feb 26, 2016 at 01:46:26PM +0100, Arnd Bergmann wrote:
> A wrapper around the umull assembly instruction might reuse
> the input register as an output, which is undefined on
> some ARM machines, as pointed out by this assembler warning:
> 
>   CC      lib/mpi/generic_mpih-mul1.o
> /tmp/ccxJuxIy.s: Assembler messages:
> /tmp/ccxJuxIy.s:53: rdhi, rdlo and rm must all be different
>   CC      lib/mpi/generic_mpih-mul2.o
> /tmp/ccI0scAD.s: Assembler messages:
> /tmp/ccI0scAD.s:53: rdhi, rdlo and rm must all be different
>   CC      lib/mpi/generic_mpih-mul3.o
> /tmp/ccMvVQcp.s: Assembler messages:
> /tmp/ccMvVQcp.s:53: rdhi, rdlo and rm must all be different
> 
> This changes the constraints to force different registers to
> be used as output.
> 
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Both applied.
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

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[PATCH 1/2] lib/mpi: avoid assembler warning Arnd Bergmann <arnd@arndb.de> - 2016-02-26 13:50 +0100
  [PATCH 2/2] lib/mpi: use "static inline" instead of "extern inline" Arnd Bergmann <arnd@arndb.de> - 2016-02-26 13:50 +0100
  Re: [PATCH 1/2] lib/mpi: avoid assembler warning Herbert Xu <herbert@gondor.apana.org.au> - 2016-02-27 20:40 +0100

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