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authorAlex Dewar <alex.dewar90@gmail.com>2020-08-21 02:55:57 +0300
committerJulia Lawall <Julia.Lawall@lip6.fr>2020-08-21 23:35:40 +0300
commit7a2624e6de03050c9f15af21c216818d5508b5e9 (patch)
tree38ab3ae6ed6eb80ceef417659ca8ef4fa47c5592 /scripts/coccinelle
parent4b2bd20c350a66d4f8a7c2da48b115fd4e06d15e (diff)
downloadlinux-7a2624e6de03050c9f15af21c216818d5508b5e9.tar.xz
coccinelle: add patch rule for dma_alloc_coherent
Commit dfd32cad146e ("dma-mapping: remove dma_zalloc_coherent()") removed the definition of dma_zalloc_coherent() and also removed the corresponding patch rule for replacing instances of dma_alloc_coherent + memset in zalloc-simple.cocci (though left the report rule). Add a new patch rule to remove unnecessary calls to memset after allocating with dma_alloc_coherent. While we're at it, fix a couple of typos. Fixes: dfd32cad146e ("dma-mapping: remove dma_zalloc_coherent()") Signed-off-by: Alex Dewar <alex.dewar90@gmail.com> Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Diffstat (limited to 'scripts/coccinelle')
-rw-r--r--scripts/coccinelle/api/alloc/zalloc-simple.cocci16
1 files changed, 13 insertions, 3 deletions
diff --git a/scripts/coccinelle/api/alloc/zalloc-simple.cocci b/scripts/coccinelle/api/alloc/zalloc-simple.cocci
index 26cda3f48f01..b3d0c3c230c1 100644
--- a/scripts/coccinelle/api/alloc/zalloc-simple.cocci
+++ b/scripts/coccinelle/api/alloc/zalloc-simple.cocci
@@ -127,6 +127,16 @@ statement S;
if ((x==NULL) || ...) S
- memset((T2)x,0,E1);
+@depends on patch@
+type T, T2;
+expression x;
+expression E1,E2,E3,E4;
+statement S;
+@@
+ x = (T)dma_alloc_coherent(E1, E2, E3, E4);
+ if ((x==NULL) || ...) S
+- memset((T2)x, 0, E2);
+
//----------------------------------------------------------
// For org mode
//----------------------------------------------------------
@@ -199,9 +209,9 @@ statement S;
position p;
@@
- x = (T)dma_alloc_coherent@p(E2,E1,E3,E4);
+ x = (T)dma_alloc_coherent@p(E1,E2,E3,E4);
if ((x==NULL) || ...) S
- memset((T2)x,0,E1);
+ memset((T2)x,0,E2);
@script:python depends on org@
p << r2.p;
@@ -217,7 +227,7 @@ p << r2.p;
x << r2.x;
@@
-msg="WARNING: dma_alloc_coherent use in %s already zeroes out memory, so memset is not needed" % (x)
+msg="WARNING: dma_alloc_coherent used in %s already zeroes out memory, so memset is not needed" % (x)
coccilib.report.print_report(p[0], msg)
//-----------------------------------------------------------------