[PATCH v4] documentation: coccinelle: Improve command example for make C={1,2}

[PATCH v4] documentation: coccinelle: Improve command example for make C={1,2}

[Sumera Priyadarsini]

Modify coccinelle documentation to further clarify
the usage of the makefile C variable by coccicheck.

Signed-off-by: Sumera Priyadarsini <sylphrenadin@gmail.com>

---
Changes in v4:
        - Modify commit message to clarify C is a variable
---
 Documentation/dev-tools/coccinelle.rst | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/Documentation/dev-tools/coccinelle.rst b/Documentation/dev-tools/coccinelle.rst
index 6c791af1c859..74c5e6aeeff5 100644
--- a/Documentation/dev-tools/coccinelle.rst
+++ b/Documentation/dev-tools/coccinelle.rst
@@ -175,13 +175,20 @@ For example, to check drivers/net/wireless/ one may write::
     make coccicheck M=drivers/net/wireless/
 
 To apply Coccinelle on a file basis, instead of a directory basis, the
-following command may be used::
+C variable is used by the makefile to select which files to work with.
+This variable can be used to run scripts for the entire kernel, a
+specific directory, or for a single file.
 
-    make C=1 CHECK="scripts/coccicheck"
+For example, to check drivers/bluetooth/bfusb.c, the value 1 is
+passed to the C variable to check files that make considers
+need to be compiled.::
 
-To check only newly edited code, use the value 2 for the C flag, i.e.::
+    make C=1 CHECK=scripts/coccicheck drivers/bluetooth/bfusb.o
 
-    make C=2 CHECK="scripts/coccicheck"
+The value 2 is passed to the C variable to check files regardless of
+whether they need to be compiled or not.::
+
+    make C=2 CHECK=scripts/coccicheck drivers/bluetooth/bfusb.o
 
 In these modes, which work on a file basis, there is no information
 about semantic patches displayed, and no commit message proposed.
-- 
2.17.1

Re: [PATCH v4] documentation: coccinelle: Improve command example for make C={1,2}

[Jonathan Corbet]

On Tue, 11 Aug 2020 05:53:50 +0530
Sumera Priyadarsini <sylphrenadin@gmail.com> wrote:

> Modify coccinelle documentation to further clarify
> the usage of the makefile C variable by coccicheck.
> 
> Signed-off-by: Sumera Priyadarsini <sylphrenadin@gmail.com>
> 
> ---
> Changes in v4:
>         - Modify commit message to clarify C is a variable
> ---
>  Documentation/dev-tools/coccinelle.rst | 15 +++++++++++----
>  1 file changed, 11 insertions(+), 4 deletions(-)

Applied, thanks.

jon

Re: [Cocci] [PATCH v4] documentation: coccinelle: Improve command example for make C={1, 2}

[Julia Lawall]

On Tue, 11 Aug 2020, Sumera Priyadarsini wrote:

> Modify coccinelle documentation to further clarify
> the usage of the makefile C variable by coccicheck.
>
> Signed-off-by: Sumera Priyadarsini <sylphrenadin@gmail.com>

Acked-by: Julia Lawall <julia.lawall@inria.fr>

Thanks.


>
> ---
> Changes in v4:
>         - Modify commit message to clarify C is a variable
> ---
>  Documentation/dev-tools/coccinelle.rst | 15 +++++++++++----
>  1 file changed, 11 insertions(+), 4 deletions(-)
>
> diff --git a/Documentation/dev-tools/coccinelle.rst b/Documentation/dev-tools/coccinelle.rst
> index 6c791af1c859..74c5e6aeeff5 100644
> --- a/Documentation/dev-tools/coccinelle.rst
> +++ b/Documentation/dev-tools/coccinelle.rst
> @@ -175,13 +175,20 @@ For example, to check drivers/net/wireless/ one may write::
>      make coccicheck M=drivers/net/wireless/
>
>  To apply Coccinelle on a file basis, instead of a directory basis, the
> -following command may be used::
> +C variable is used by the makefile to select which files to work with.
> +This variable can be used to run scripts for the entire kernel, a
> +specific directory, or for a single file.
>
> -    make C=1 CHECK="scripts/coccicheck"
> +For example, to check drivers/bluetooth/bfusb.c, the value 1 is
> +passed to the C variable to check files that make considers
> +need to be compiled.::
>
> -To check only newly edited code, use the value 2 for the C flag, i.e.::
> +    make C=1 CHECK=scripts/coccicheck drivers/bluetooth/bfusb.o
>
> -    make C=2 CHECK="scripts/coccicheck"
> +The value 2 is passed to the C variable to check files regardless of
> +whether they need to be compiled or not.::
> +
> +    make C=2 CHECK=scripts/coccicheck drivers/bluetooth/bfusb.o
>
>  In these modes, which work on a file basis, there is no information
>  about semantic patches displayed, and no commit message proposed.
> --
> 2.17.1
>
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