Re: [PATCH 1/2] Compiler Attributes: add support for __fallthrough (gcc >= 7.1)
From: Bernd Petrovitsch <hidden>
Date: 2018-10-22 09:48:14
Also in:
linux-ext4, linux-kbuild, lkml
From: Bernd Petrovitsch <hidden>
Date: 2018-10-22 09:48:14
Also in:
linux-ext4, linux-kbuild, lkml
On 22/10/2018 00:27, Theodore Y. Ts'o wrote:
On Sun, Oct 21, 2018 at 07:14:13PM +0200, Miguel Ojeda wrote:quoted
From the GCC manual: fallthrough The fallthrough attribute with a null statement serves as a fallthrough statement. It hints to the compiler that a statement that falls through to another case label, or user-defined label in a switch statement is intentional and thus the -Wimplicit-fallthrough warning must not trigger. The fallthrough attribute may appear at most once in each attribute list, and may not be mixed with other attributes. It can only be used in a switch statement (the compiler will issue an error otherwise), after a preceding statement and before a logically succeeding case label, or user-defined label. https://gcc.gnu.org/onlinedocs/gcc/Statement-Attributes.htmlDo we know if coverity understands the fallthrough attribute? One of the reasons why I started using /* fallthrough */ is because it kept Coverity happy.
FWIW, current "eclipse" has the same "problem".
If the conversion from /* fallthrough */ to the __fallthrough__ attribute means that we start gethting a lot of Coverity warnings,
We could keep both.
MfG,
Bernd
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Bernd Petrovitsch Email : bernd@petrovitsch.priv.at
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