CHECK: Macro argument 'cfg' may be better as '(cfg)' to avoid precedence issues
CHECK: Unbalanced braces around else statement
CHECK: braces {} should be used on all arms of this statement
WARNING: Missing a blank line after declarations
WARNING: Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst
WARNING: line length of 107 exceeds 80 columns
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WARNING: line length of 99 exceeds 80 columns