Re: [Intel-wired-lan] [PATCH 000/141] Fix fall-through warnings for Clang

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]


On Wed, Nov 25, 2020 at 1:33 PM Finn Thain <fthain@xxxxxxxxxxxxxxxxxxx> wrote:
> Or do you think that a codebase can somehow satisfy multiple checkers and
> their divergent interpretations of the language spec?

Have we found any cases yet that are divergent? I don't think so.  It
sounds to me like GCC's cases it warns for is a subset of Clang's.
Having additional coverage with Clang then should ensure coverage for

> > This is not a shiny new warning; it's already on for GCC and has existed
> > in both compilers for multiple releases.
> >
> Perhaps you're referring to the compiler feature that lead to the
> ill-fated, tree-wide /* fallthrough */ patch series.
> When the ink dries on the C23 language spec and the implementations figure
> out how to interpret it then sure, enforce the warning for new code -- the
> cost/benefit analysis is straight forward. However, the case for patching
> existing mature code is another story.

I don't think we need to wait for the ink to dry on the C23 language
spec to understand that implicit fallthrough is an obvious defect of
the C language.  While the kernel is a mature codebase, it's not
immune to bugs.  And its maturity has yet to slow its rapid pace of
~Nick Desaulniers

[Index of Archives]     [Linux File System Development]     [Linux BTRFS]     [Linux NFS]     [Linux Filesystems]     [Ext4 Filesystem]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite Forum]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Samba]     [Device Mapper]     [Linux Resources]

  Powered by Linux