[Linux-kernel-mentees] [PATCH] checkpatch: add warning for avoiding .L prefix symbols in assembly files

Joe Perches joe at perches.com
Wed Jan 20 09:21:03 UTC 2021

On Wed, 2021-01-20 at 12:55 +0530, Aditya Srivastava wrote:
> Local symbols prefixed with '.L' do not emit symbol table entries, as
> they have special meaning for the assembler.
> '.L' prefixed symbols can be used within a code region, but should be
> avoided for denoting a range of code via 'SYM_*_START/END' annotations.
> Add a new check to emit a warning on finding the usage of '.L' symbols
> in '.S' files, if it lies within SYM_*_START/END annotation pair.

I believe this needs a test for $file as it won't work well on
patches as the SYM_*_START/END may not be in the patch context.

Also, is this supposed to work for local labels like '.L<foo>:'?
I don't think a warning should be generated for those.

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