From: "Gustavo A. R. Silva" <gustavoars@kernel.org>
To: Cc: linux-kernel@vger.kernel.org,
"Gustavo A. R. Silva" <gustavoars@kernel.org>,
linux-hardening@vger.kernel.org, ;
Subject: [PATCH][next] mm/memremap: Replace zero-length array with DECLARE_FLEX_ARRAY() helper
Date: Sat, 3 Sep 2022 00:17:18 +0100 [thread overview]
Message-ID: <YxKO/jY1x0xTpl4r@work> (raw)
Zero-length arrays are deprecated and we are moving towards adopting
C99 flexible-array members, instead. So, replace zero-length array
declaration in struct dev_pagemap with the new DECLARE_FLEX_ARRAY()
helper macro.
This helper allows for a flexible-array member in a union.
Also, this addresses multiple warnings reported when building
with Clang-15 and -Wzero-length-array.
Link: https://github.com/KSPP/linux/issues/193
Link: https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
include/linux/memremap.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/memremap.h b/include/linux/memremap.h
index c3b4cc84877b..ad3c38840194 100644
--- a/include/linux/memremap.h
+++ b/include/linux/memremap.h
@@ -135,7 +135,7 @@ struct dev_pagemap {
int nr_range;
union {
struct range range;
- struct range ranges[0];
+ DECLARE_FLEX_ARRAY(struct range, ranges);
};
};
--
2.34.1
next reply other threads:[~2022-09-02 23:17 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-02 23:17 Gustavo A. R. Silva [this message]
2022-09-03 5:10 ` [PATCH][next] mm/memremap: Replace zero-length array with DECLARE_FLEX_ARRAY() helper Kees Cook
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