linux-kernel - [PATCH AUTOSEL 6.10 004/197] crypto: x86/sha256 - Add parentheses around macros' single arguments

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Message-ID: <20240925115823.1303019-4-sashal@kernel.org>
Date: Wed, 25 Sep 2024 07:50:23 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Fangrui Song <maskray@...gle.com>,
	Jan Beulich <jbeulich@...e.com>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	Sasha Levin <sashal@...nel.org>,
	davem@...emloft.net,
	tglx@...utronix.de,
	mingo@...hat.com,
	bp@...en8.de,
	dave.hansen@...ux.intel.com,
	x86@...nel.org,
	nathan@...nel.org,
	linux-crypto@...r.kernel.org,
	llvm@...ts.linux.dev
Subject: [PATCH AUTOSEL 6.10 004/197] crypto: x86/sha256 - Add parentheses around macros' single arguments

From: Fangrui Song <maskray@...gle.com>

[ Upstream commit 3363c460ef726ba693704dbcd73b7e7214ccc788 ]

The macros FOUR_ROUNDS_AND_SCHED and DO_4ROUNDS rely on an
unexpected/undocumented behavior of the GNU assembler, which might
change in the future
(https://sourceware.org/bugzilla/show_bug.cgi?id=32073).

    M (1) (2) // 1 arg !? Future: 2 args
    M 1 + 2   // 1 arg !? Future: 3 args

    M 1 2     // 2 args

Add parentheses around the single arguments to support future GNU
assembler and LLVM integrated assembler (when the IsOperator hack from
the following link is dropped).

Link: https://github.com/llvm/llvm-project/commit/055006475e22014b28a070db1bff41ca15f322f0
Signed-off-by: Fangrui Song <maskray@...gle.com>
Reviewed-by: Jan Beulich <jbeulich@...e.com>
Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/x86/crypto/sha256-avx2-asm.S | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/arch/x86/crypto/sha256-avx2-asm.S b/arch/x86/crypto/sha256-avx2-asm.S
index 0ffb072be9561..0bbec1c75cd0b 100644
--- a/arch/x86/crypto/sha256-avx2-asm.S
+++ b/arch/x86/crypto/sha256-avx2-asm.S
@@ -592,22 +592,22 @@ SYM_TYPED_FUNC_START(sha256_transform_rorx)
 	leaq	K256+0*32(%rip), INP		## reuse INP as scratch reg
 	vpaddd	(INP, SRND), X0, XFER
 	vmovdqa XFER, 0*32+_XFER(%rsp, SRND)
-	FOUR_ROUNDS_AND_SCHED	_XFER + 0*32
+	FOUR_ROUNDS_AND_SCHED	(_XFER + 0*32)
 
 	leaq	K256+1*32(%rip), INP
 	vpaddd	(INP, SRND), X0, XFER
 	vmovdqa XFER, 1*32+_XFER(%rsp, SRND)
-	FOUR_ROUNDS_AND_SCHED	_XFER + 1*32
+	FOUR_ROUNDS_AND_SCHED	(_XFER + 1*32)
 
 	leaq	K256+2*32(%rip), INP
 	vpaddd	(INP, SRND), X0, XFER
 	vmovdqa XFER, 2*32+_XFER(%rsp, SRND)
-	FOUR_ROUNDS_AND_SCHED	_XFER + 2*32
+	FOUR_ROUNDS_AND_SCHED	(_XFER + 2*32)
 
 	leaq	K256+3*32(%rip), INP
 	vpaddd	(INP, SRND), X0, XFER
 	vmovdqa XFER, 3*32+_XFER(%rsp, SRND)
-	FOUR_ROUNDS_AND_SCHED	_XFER + 3*32
+	FOUR_ROUNDS_AND_SCHED	(_XFER + 3*32)
 
 	add	$4*32, SRND
 	cmp	$3*4*32, SRND
@@ -618,12 +618,12 @@ SYM_TYPED_FUNC_START(sha256_transform_rorx)
 	leaq	K256+0*32(%rip), INP
 	vpaddd	(INP, SRND), X0, XFER
 	vmovdqa XFER, 0*32+_XFER(%rsp, SRND)
-	DO_4ROUNDS	_XFER + 0*32
+	DO_4ROUNDS	(_XFER + 0*32)
 
 	leaq	K256+1*32(%rip), INP
 	vpaddd	(INP, SRND), X1, XFER
 	vmovdqa XFER, 1*32+_XFER(%rsp, SRND)
-	DO_4ROUNDS	_XFER + 1*32
+	DO_4ROUNDS	(_XFER + 1*32)
 	add	$2*32, SRND
 
 	vmovdqa	X2, X0
@@ -651,8 +651,8 @@ SYM_TYPED_FUNC_START(sha256_transform_rorx)
 	xor	SRND, SRND
 .align 16
 .Lloop3:
-	DO_4ROUNDS	 _XFER + 0*32 + 16
-	DO_4ROUNDS	 _XFER + 1*32 + 16
+	DO_4ROUNDS	(_XFER + 0*32 + 16)
+	DO_4ROUNDS	(_XFER + 1*32 + 16)
 	add	$2*32, SRND
 	cmp	$4*4*32, SRND
 	jb	.Lloop3
-- 
2.43.0