linux-kernel - [BUG] scripts/checkpatch.pl: false positive missing parentheses

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Message-Id: <20180507183105.13499-1-xypron.glpk@gmx.de>
Date:   Mon,  7 May 2018 20:31:05 +0200
From:   Heinrich Schuchardt <xypron.glpk@....de>
To:     Joe Perches <joe@...ches.com>
Cc:     Andy Whitcroft <apw@...onical.com>, linux-kernel@...r.kernel.org,
        Heinrich Schuchardt <xypron.glpk@....de>
Subject: [BUG] scripts/checkpatch.pl: false positive missing parentheses

This patch creates a false positive:
ERROR: Macros with complex values should be enclosed in parentheses

Here we define a constant that can be used to initialize a structure.
Adding parentheses would lead to a compile time error:
error: braced-group within expression allowed only inside a function

Signed-off-by: Heinrich Schuchardt <xypron.glpk@....de>
---
 foo.h | 8 ++++++++
 1 file changed, 8 insertions(+)
 create mode 100644 foo.h

diff --git a/foo.h b/foo.h
new file mode 100644
index 000000000000..e2cba533f065
--- /dev/null
+++ b/foo.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: BSD-2 */
+#define EFI_ST_DISK_IMG { 0x00003368, { \
+	{0x00000d40, "\x6f\x63\x00\x2f\x2a\x00\x20\x2a"}, /* oc./*. * */ \
+	{0x00000d48, "\x00\x20\x2a\x2f\x0a\x00\x09\x7b"}, /* . */...{ */ \
+	{0x00000d50, "\x30\x78\x25\x30\x38\x7a\x78\x2c"}, /* 0x%08zx, */ \
+	{0x00000d58, "\x20\x22\x00\x5c\x78\x25\x30\x32"}, /*  ".\x%02 */ \
+	{0x00000d60, "\x78\x00\x20\x2a\x2f\x20\x5c\x00"}, /* x. */ \. */ \
+	{0, NULL} } }
-- 
2.17.0