linux-kernel - [PATCH 1/2] arm64/esr: Use GENMASK() for the ISS mask

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Message-Id: <20230417-arm64-iss2-dabt-decode-v1-1-2138b5668777@kernel.org>
Date:   Tue, 18 Apr 2023 14:57:31 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Mark Brown <broonie@...nel.org>
Subject: [PATCH 1/2] arm64/esr: Use GENMASK() for the ISS mask

We express the mask for ESR_ELx.ISS in a non-standard manner, not using
the standard helpers. In preparation for adding decode for ISS2 convert to
use GENMASK(). No functional change.

Signed-off-by: Mark Brown <broonie@...nel.org>
---
 arch/arm64/include/asm/esr.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/esr.h b/arch/arm64/include/asm/esr.h
index 8487aec9b658..0bd879007168 100644
--- a/arch/arm64/include/asm/esr.h
+++ b/arch/arm64/include/asm/esr.h
@@ -75,7 +75,7 @@
 
 #define ESR_ELx_IL_SHIFT	(25)
 #define ESR_ELx_IL		(UL(1) << ESR_ELx_IL_SHIFT)
-#define ESR_ELx_ISS_MASK	(ESR_ELx_IL - 1)
+#define ESR_ELx_ISS_MASK	(GENMASK(24, 0))
 #define ESR_ELx_ISS(esr)	((esr) & ESR_ELx_ISS_MASK)
 
 /* ISS field definitions shared by different classes */

-- 
2.30.2