linux-kernel - [PATCH v3 05/13] mfd: macsmc: add new __SMC

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20251007-macsmc-subdevs-v3-5-d7d3bfd7ae02@gmail.com>
Date: Tue, 07 Oct 2025 21:16:46 +1000
From: James Calligeros <jcalligeros99@...il.com>
To: Sven Peter <sven@...nel.org>, Janne Grunau <j@...nau.net>, 
 Alyssa Rosenzweig <alyssa@...enzweig.io>, Neal Gompa <neal@...pa.dev>, 
 Lee Jones <lee@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Alexandre Belloni <alexandre.belloni@...tlin.com>, 
 Jean Delvare <jdelvare@...e.com>, Guenter Roeck <linux@...ck-us.net>, 
 Dmitry Torokhov <dmitry.torokhov@...il.com>, 
 Jonathan Corbet <corbet@....net>, 
 James Calligeros <jcalligeros99@...il.com>
Cc: asahi@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-rtc@...r.kernel.org, linux-hwmon@...r.kernel.org, 
 linux-input@...r.kernel.org, linux-doc@...r.kernel.org
Subject: [PATCH v3 05/13] mfd: macsmc: add new __SMC_KEY macro

When using the _SMC_KEY macro in switch/case statements, GCC 15.2.1 errors
out with 'case label does not reduce to an integer constant'. Introduce
a new __SMC_KEY macro that can be used instead.

Signed-off-by: James Calligeros <jcalligeros99@...il.com>
---
 include/linux/mfd/macsmc.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/mfd/macsmc.h b/include/linux/mfd/macsmc.h
index 6b13f01a8592..f6f80c33b5cf 100644
--- a/include/linux/mfd/macsmc.h
+++ b/include/linux/mfd/macsmc.h
@@ -41,6 +41,7 @@ typedef u32 smc_key;
  */
 #define SMC_KEY(s) (smc_key)(_SMC_KEY(#s))
 #define _SMC_KEY(s) (((s)[0] << 24) | ((s)[1] << 16) | ((s)[2] << 8) | (s)[3])
+#define __SMC_KEY(a, b, c, d) (((u32)(a) << 24) | ((u32)(b) << 16) | ((u32)(c) << 8) | ((u32)(d)))
 
 #define APPLE_SMC_READABLE BIT(7)
 #define APPLE_SMC_WRITABLE BIT(6)

-- 
2.51.0