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author | Joe Perches <joe@perches.com> | 2019-10-05 09:46:42 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-10-11 09:26:05 -0700 |
commit | 294f69e662d1570703e9b56e95be37a9fd3afba5 (patch) | |
tree | 8138e829d29b3f06e3bc1de49cab4a34e31dc1a7 /Documentation/process/coding-style.rst | |
parent | 48f9bcf91461b43249949f4e172b5c0245dde751 (diff) | |
download | linux-stable-294f69e662d1570703e9b56e95be37a9fd3afba5.tar.gz linux-stable-294f69e662d1570703e9b56e95be37a9fd3afba5.tar.bz2 linux-stable-294f69e662d1570703e9b56e95be37a9fd3afba5.zip |
compiler_attributes.h: Add 'fallthrough' pseudo keyword for switch/case use
Reserve the pseudo keyword 'fallthrough' for the ability to convert the
various case block /* fallthrough */ style comments to appear to be an
actual reserved word with the same gcc case block missing fallthrough
warning capability.
All switch/case blocks now should end in one of:
break;
fallthrough;
goto <label>;
return [expression];
continue;
In C mode, GCC supports the __fallthrough__ attribute since 7.1,
the same time the warning and the comment parsing were introduced.
fallthrough devolves to an empty "do {} while (0)" if the compiler
version (any version less than gcc 7) does not support the attribute.
Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Suggested-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/process/coding-style.rst')
0 files changed, 0 insertions, 0 deletions