Patch "crypto: arm/ghash-ce - define fpu before fpu registers are referenced" has been added to the 5.4-stable tree

[gregkh at linuxfoundation.org]

This is a note to let you know that I've just added the patch titled

    crypto: arm/ghash-ce - define fpu before fpu registers are referenced

to the 5.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     crypto-arm-ghash-ce-define-fpu-before-fpu-registers-are-referenced.patch
and it can be found in the queue-5.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable at vger.kernel.org> know about it.


>From foo at baz Thu Jun 30 03:27:07 PM CEST 2022
From: Florian Fainelli <f.fainelli at gmail.com>
Date: Wed, 29 Jun 2022 11:02:27 -0700
Subject: crypto: arm/ghash-ce - define fpu before fpu registers are referenced
To: stable at vger.kernel.org
Cc: Stefan Agner <stefan at agner.ch>, Nick Desaulniers <ndesaulniers at google.com>, Ard Biesheuvel <ardb at kernel.org>, Herbert Xu <herbert at gondor.apana.org.au>, Florian Fainelli <f.fainelli at gmail.com>, Russell King <linux at armlinux.org.uk>, "David S. Miller" <davem at davemloft.net>, Tony Lindgren <tony at atomide.com>, Hans Ulli Kroll <ulli.kroll at googlemail.com>, Nicolas Pitre <nico at fluxnic.net>, Andre Przywara <andre.przywara at arm.com>, "Russell King (Oracle)" <rmk+kernel at armlinux.org.uk>, Greg Kroah-Hartman <gregkh at linuxfoundation.org>, Catalin Marinas <catalin.marinas at arm.com>, Jian Cai <caij2003 at gmail.com>, linux-arm-kernel at lists.infradead.org (moderated list:ARM PORT), linux-kernel at vger.kernel.org (open list), linux-crypto at vger.kernel.org (open list:CRYPTO API), linux-omap at vger.kernel.org (open list:OMAP2+ SUPPORT), clang-built-linux at googlegroups.com (open list:CLANG/LLVM BUILD SUPPORT), Sasha Levin <sashal at kernel.org>
Message-ID: <20220629180227.3408104-12-f.fainelli at gmail.com>

From: Stefan Agner <stefan at agner.ch>

commit 7548bf8c17d84607c106bd45d81834afd95a2edb upstream

Building ARMv7 with Clang's integrated assembler leads to errors such
as:
arch/arm/crypto/ghash-ce-core.S:34:11: error: register name expected
 t3l .req d16
          ^

Since no FPU has selected yet Clang considers d16 not a valid register.
Moving the FPU directive on-top allows Clang to parse the registers and
allows to successfully build this file with Clang's integrated assembler.

Signed-off-by: Stefan Agner <stefan at agner.ch>
Reviewed-by: Nick Desaulniers <ndesaulniers at google.com>
Tested-by: Nick Desaulniers <ndesaulniers at google.com>
Acked-by: Ard Biesheuvel <ardb at kernel.org>
Signed-off-by: Herbert Xu <herbert at gondor.apana.org.au>
Signed-off-by: Florian Fainelli <f.fainelli at gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
---
 arch/arm/crypto/ghash-ce-core.S |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/arch/arm/crypto/ghash-ce-core.S
+++ b/arch/arm/crypto/ghash-ce-core.S
@@ -8,6 +8,9 @@
 #include <linux/linkage.h>
 #include <asm/assembler.h>
 
+	.arch		armv8-a
+	.fpu		crypto-neon-fp-armv8
+
 	SHASH		.req	q0
 	T1		.req	q1
 	XL		.req	q2
@@ -88,8 +91,6 @@
 	T3_H		.req	d17
 
 	.text
-	.arch		armv8-a
-	.fpu		crypto-neon-fp-armv8
 
 	.macro		__pmull_p64, rd, rn, rm, b1, b2, b3, b4
 	vmull.p64	\rd, \rn, \rm


Patches currently in stable-queue which might be from f.fainelli at gmail.com are

queue-5.4/arm-8971-1-replace-the-sole-use-of-a-symbol-with-its-definition.patch
queue-5.4/arm-omap2-drop-unnecessary-adrl.patch
queue-5.4/arm-8933-1-replace-sun-solaris-style-flag-on-section-directive.patch
queue-5.4/crypto-arm-sha256-neon-avoid-adrl-pseudo-instruction.patch
queue-5.4/arm-9029-1-make-iwmmxt.s-support-clang-s-integrated-assembler.patch
queue-5.4/net-mscc-ocelot-allow-unregistered-ip-multicast-flooding.patch
queue-5.4/crypto-arm-sha512-neon-avoid-adrl-pseudo-instruction.patch
queue-5.4/arm-8989-1-use-.fpu-assembler-directives-instead-of-assembler-arguments.patch
queue-5.4/crypto-arm-ghash-ce-define-fpu-before-fpu-registers-are-referenced.patch
queue-5.4/arm-8929-1-use-apsr_nzcv-instead-of-r15-as-mrc-operand.patch
queue-5.4/crypto-arm-use-kconfig-based-compiler-checks-for-crypto-opcodes.patch
queue-5.4/arm-8990-1-use-vfp-assembler-mnemonics-in-register-load-store-macros.patch