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    SubjectRe: [PATCH 2/6] Coccinelle: Update documentation
     - Add information about use of the C={1,2} make flag
    - Add a description of the new chain mode mechanism
    - Add a link to the wiki

    Signed-off-by: Nicolas Palix <>
    Signed-off-by: Julia Lawall <>
    This is a resubmission that fixes trailing whitespaces and a typo.

    Documentation/coccinelle.txt | 42 +++++++++++++++++++++++++++++++++++-------
    1 files changed, 35 insertions(+), 7 deletions(-)

    diff --git a/Documentation/coccinelle.txt b/Documentation/coccinelle.txt
    index cd2b028..de51a3e 100644
    --- a/Documentation/coccinelle.txt
    +++ b/Documentation/coccinelle.txt
    @@ -24,6 +24,9 @@ of many distributions, e.g. :
    You can get the latest version released from the Coccinelle homepage at

    +Information and tips about Coccinelle are also provided on the wiki
    +pages at
    Once you have it, run the following command:

    @@ -41,20 +44,22 @@ A Coccinelle-specific target is defined in the top level
    Makefile. This target is named 'coccicheck' and calls the 'coccicheck'
    front-end in the 'scripts' directory.

    -Four modes are defined: report, patch, context, and org. The mode to
    +Four modes are defined: patch, report, context, and org. The mode to
    use is specified by setting the MODE variable with 'MODE=<mode>'.

    +'patch' proposes a fix, when possible.
    'report' generates a list in the following format:
    file:line:column-column: message

    -'patch' proposes a fix, when possible.
    'context' highlights lines of interest and their context in a
    diff-like style.Lines of interest are indicated with '-'.

    'org' generates a report in the Org mode format of Emacs.

    -Note that not all semantic patches implement all modes.
    +Note that not all semantic patches implement all modes. For easy use
    +of Coccinelle, the default mode is "chain" which tries the previous
    +modes in the order above until one succeeds.

    To make a report for every semantic patch, run the following command:

    @@ -68,9 +73,9 @@ To produce patches, run:

    The coccicheck target applies every semantic patch available in the
    -subdirectories of 'scripts/coccinelle' to the entire Linux kernel.
    +sub-directories of 'scripts/coccinelle' to the entire Linux kernel.

    -For each semantic patch, a changelog message is proposed. It gives a
    +For each semantic patch, a commit message is proposed. It gives a
    description of the problem being checked by the semantic patch, and
    includes a reference to Coccinelle.

    @@ -93,12 +98,35 @@ or
    make coccicheck COCCI=<my_SP.cocci> MODE=report

    + Using Coccinelle on (modified) files
    +To apply Coccinelle on a file basis, instead of a directory basis, the
    +following command may be used:
    + make C=1 CHECK="scripts/coccicheck"
    +To check only newly edited code, use the value 2 for the C flag, i.e.
    + make C=2 CHECK="scripts/coccicheck"
    +This runs every semantic patch in scripts/coccinelle by default. The
    +COCCI variable may additionally be used to only apply a single
    +semantic patch as shown in the previous section.
    +The "chain" mode is the default. You can select another one with the
    +MODE variable explained above.
    +In this mode, there is no information about semantic patches
    +displayed, and no commit message proposed.
    Proposing new semantic patches

    New semantic patches can be proposed and submitted by kernel
    developers. For sake of clarity, they should be organized in the
    -subdirectories of 'scripts/coccinelle/'.
    +sub-directories of 'scripts/coccinelle/'.

    Detailed description of the 'report' mode

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