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// SPDX-License-Identifier: GPL-2.0-only /// /// Zero-length and one-element arrays are deprecated, see /// Documentation/process/deprecated.rst /// Flexible-array members should be used instead. /// // // Confidence: High // Copyright: (C) 2020 Denis Efremov ISPRAS. // Comments: // Options: --no-includes --include-headers virtual context virtual report virtual org virtual patch @initialize:python@ @@ def relevant(positions): for p in positions: if "uapi" in p.file: return False return True @r depends on !patch@ identifier name, array; type T; position p : script:python() { relevant(p) }; @@ ( struct name { ... * T array@p[\(0\|1\)]; }; | struct { ... * T array@p[\(0\|1\)]; }; | union name { ... * T array@p[\(0\|1\)]; }; | union { ... * T array@p[\(0\|1\)]; }; ) @only_field depends on patch@ identifier name, array; type T; position q; @@ ( struct name {@q T array[0]; }; | struct {@q T array[0]; }; ) @depends on patch@ identifier name, array; type T; position p : script:python() { relevant(p) }; // position @q with rule "only_field" simplifies // handling of bitfields, arrays, etc. position q != only_field.q; @@ ( struct name {@q ... T array@p[ - 0 ]; }; | struct {@q ... T array@p[ - 0 ]; }; ) @script: python depends on report@ p << r.p; @@ msg = "WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)" coccilib.report.print_report(p[0], msg) @script: python depends on org@ p << r.p; @@ msg = "WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)" coccilib.org.print_todo(p[0], msg)