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Documentation: Coccinelle: Improve command example for debugging patches

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Modify Coccinelle documentation to clarify usage of make command to
run coccicheck on a folder.

Changes in v2:
- Give example of folder instead of file
- Add note

Signed-off-by: Sumera Priyadarsini <sylphrenadin@gmail.com>
Link: https://lore.kernel.org/r/20201126075730.w6brpeuviefmsxhl@adolin
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Sumera Priyadarsini 2020-11-26 13:27:30 +05:30 committed by Jonathan Corbet
parent ed13a92d0f
commit 27b03cf1b7
1 changed files with 8 additions and 1 deletions
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9
Documentation/dev-tools/coccinelle.rst
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@ -224,14 +224,21 @@ you may want to use::
rm -f err.log
export COCCI=scripts/coccinelle/misc/irqf_oneshot.cocci
make coccicheck DEBUG_FILE="err.log" MODE=report SPFLAGS="--profile --show-trying" M=./drivers/mfd/arizona-irq.c
make coccicheck DEBUG_FILE="err.log" MODE=report SPFLAGS="--profile --show-trying" M=./drivers/mfd
err.log will now have the profiling information, while stdout will
provide some progress information as Coccinelle moves forward with
work.
NOTE:
DEBUG_FILE support is only supported when using coccinelle >= 1.0.2.
Currently, DEBUG_FILE support is only available to check folders, and
not single files. This is because checking a single file requires spatch
to be called twice leading to DEBUG_FILE being set both times to the same value,
giving rise to an error.
.cocciconfig support
--------------------