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* [Cocci] [PATCH v2] Documentation: Coccinelle: Improve command example for debugging patches
@ 2020-11-26  7:57 Sumera Priyadarsini
  0 siblings, 0 replies; only message in thread
From: Sumera Priyadarsini @ 2020-11-26  7:57 UTC (permalink / raw)
  To: Julia.Lawall
  Cc: michal.lkml, linux-doc, corbet, nicolas.palix, linux-kernel,
	Gilles.Muller, cocci

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 <>
 Documentation/dev-tools/coccinelle.rst | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/Documentation/dev-tools/coccinelle.rst b/Documentation/dev-tools/coccinelle.rst
index 74c5e6aeeff5..9c454de5a7f7 100644
--- a/Documentation/dev-tools/coccinelle.rst
+++ b/Documentation/dev-tools/coccinelle.rst
@@ -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
 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

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2020-11-26  7:57 [Cocci] [PATCH v2] Documentation: Coccinelle: Improve command example for debugging patches Sumera Priyadarsini

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