linux-kernel - [PATCH] Coccinelle: Update and rename api/alloc/pci_free

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Message-Id: <edc2fdb429d184d05a70956ced00845bca2d4fe9.1623871406.git.christophe.jaillet@wanadoo.fr>
Date:   Wed, 16 Jun 2021 21:24:39 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     Julia.Lawall@...ia.fr, Gilles.Muller@...ia.fr,
        nicolas.palix@...g.fr, michal.lkml@...kovi.net
Cc:     cocci@...teme.lip6.fr, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] Coccinelle: Update and rename api/alloc/pci_free_consistent.cocci

'pci_alloc_consistent()' is about to be removed from the kernel.
It is now more useful to check for dma_alloc_coherent/dma_free_coherent.

So change the script accordingly and rename it.

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
Not sure that the script works.
There are 718 'dma_alloc_coherent' calls in 5.13-rc6. It is surprising
to have no match at all, not even a single false positive.
---
 ..._consistent.cocci => dma_free_coherent.cocci} | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)
 rename scripts/coccinelle/free/{pci_free_consistent.cocci => dma_free_coherent.cocci} (52%)

diff --git a/scripts/coccinelle/free/pci_free_consistent.cocci b/scripts/coccinelle/free/dma_free_coherent.cocci
similarity index 52%
rename from scripts/coccinelle/free/pci_free_consistent.cocci
rename to scripts/coccinelle/free/dma_free_coherent.cocci
index d51e92556b42..75f159e7b6d7 100644
--- a/scripts/coccinelle/free/pci_free_consistent.cocci
+++ b/scripts/coccinelle/free/dma_free_coherent.cocci
@@ -1,10 +1,10 @@
 // SPDX-License-Identifier: GPL-2.0-only
-/// Find missing pci_free_consistent for every pci_alloc_consistent.
+/// Find missing dma_free_coherent for every dma_alloc_coherent.
 ///
 // Confidence: Moderate
 // Copyright: (C) 2013 Petr Strnad.
 // URL: http://coccinelle.lip6.fr/
-// Keywords: pci_free_consistent, pci_alloc_consistent
+// Keywords: dma_free_coherent, dma_alloc_coherent
 // Options: --no-includes --include-headers
 
 virtual report
@@ -17,12 +17,12 @@ position p1,p2;
 type T;
 @@
 
-id = pci_alloc_consistent@p1(x,y,&z)
+id = dma_alloc_coherent@p1(x,y,&z)
 ... when != e = id
 if (id == NULL || ...) { ... return ...; }
-... when != pci_free_consistent(x,y,id,z)
-    when != if (id) { ... pci_free_consistent(x,y,id,z) ... }
-    when != if (y) { ... pci_free_consistent(x,y,id,z) ... }
+... when != dma_free_coherent(x,y,id,z)
+    when != if (id) { ... dma_free_coherent(x,y,id,z) ... }
+    when != if (y) { ... dma_free_coherent(x,y,id,z) ... }
     when != e = (T)id
     when exists
 (
@@ -40,7 +40,7 @@ p1 << search.p1;
 p2 << search.p2;
 @@
 
-msg = "ERROR: missing pci_free_consistent; pci_alloc_consistent on line %s and return without freeing on line %s" % (p1[0].line,p2[0].line)
+msg = "ERROR: missing dma_free_coherent; dma_alloc_coherent on line %s and return without freeing on line %s" % (p1[0].line,p2[0].line)
 coccilib.report.print_report(p2[0],msg)
 
 @script:python depends on org@
@@ -48,6 +48,6 @@ p1 << search.p1;
 p2 << search.p2;
 @@
 
-msg = "ERROR: missing pci_free_consistent; pci_alloc_consistent on line %s and return without freeing on line %s" % (p1[0].line,p2[0].line)
+msg = "ERROR: missing dma_free_coherent; dma_alloc_coherent on line %s and return without freeing on line %s" % (p1[0].line,p2[0].line)
 cocci.print_main(msg,p1)
 cocci.print_secs("",p2)
-- 
2.30.2