linux-kernel - [PATCH] coccinelle: api/atomic_as_refcounter: include message type in output

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Date:   Sun, 25 Dec 2022 20:39:25 +0530
From:   Deepak R Varma <drv@...lo.com>
To:     Julia Lawall <Julia.Lawall@...ia.fr>,
        Nicolas Palix <nicolas.palix@...g.fr>, cocci@...ia.fr,
        linux-kernel@...r.kernel.org
Cc:     Saurabh Singh Sengar <ssengar@...rosoft.com>,
        Praveen Kumar <kumarpraveen@...ux.microsoft.com>,
        Deepak R Varma <drv@...lo.com>
Subject: [PATCH] coccinelle: api/atomic_as_refcounter: include message type
 in output

A common practice is to grep for "WARNING" or "ERROR" text in the report
output from a coccinelle semantic patch script. So, include the test
"WARNING: " in the report output generated by the semantic patch for
desired filtering of the output. Also improves the readability of the
output. Here is an example of the old and new outputs reported:

    xyz_file.c:131:39-40: atomic_add_unless
    xyz_file.c:131:39-40: WARNING: atomic_add_unless

    xyz_file.c:196:6-25: atomic_dec_and_test variation before object free at line 208.
    xyz_file.c:196:6-25: WARNING: atomic_dec_and_test variation before object free at line 208.

Signed-off-by: Deepak R Varma <drv@...lo.com>
---
 scripts/coccinelle/api/atomic_as_refcounter.cocci | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/scripts/coccinelle/api/atomic_as_refcounter.cocci b/scripts/coccinelle/api/atomic_as_refcounter.cocci
index e63d52408b86..bbe5b2932933 100644
--- a/scripts/coccinelle/api/atomic_as_refcounter.cocci
+++ b/scripts/coccinelle/api/atomic_as_refcounter.cocci
@@ -55,7 +55,7 @@ identifier fname6 =~ ".*call_rcu.*";
 p1 << r1.p1;
 p2 << r1.p2;
 @@
-msg = "atomic_dec_and_test variation before object free at line %s."
+msg = "WARNING: atomic_dec_and_test variation before object free at line %s."
 coccilib.report.print_report(p1[0], msg % (p2[0].line))

 @r4 exists@
@@ -88,7 +88,7 @@ fname@p2(y, ...);
 p1 << r4.p1;
 p2 << r4.p2;
 @@
-msg = "atomic_dec_and_test variation before object free at line %s."
+msg = "WARNING: atomic_dec_and_test variation before object free at line %s."
 coccilib.report.print_report(p1[0], msg % (p2[0].line))

 @r2 exists@
@@ -107,7 +107,7 @@ atomic64_add_unless(&(a)->x,-1,1)@p1
 @script:python depends on report@
 p1 << r2.p1;
 @@
-msg = "atomic_add_unless"
+msg = "WARNING: atomic_add_unless"
 coccilib.report.print_report(p1[0], msg)

 @r3 exists@
@@ -126,5 +126,5 @@ x = atomic64_add_return@p1(-1, ...);
 @script:python depends on report@
 p1 << r3.p1;
 @@
-msg = "x = atomic_add_return(-1, ...)"
+msg = "WARNING: x = atomic_add_return(-1, ...)"
 coccilib.report.print_report(p1[0], msg)
--
2.34.1