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coccinelle: add patch rule for dma_alloc_coherent 

Commit dfd32cad14 ("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: dfd32cad14 ("dma-mapping: remove dma_zalloc_coherent()")
Signed-off-by: Alex Dewar <alex.dewar90@gmail.com>
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
This commit is contained in:
Alex Dewar 2020-08-21 00:55:57 +01:00 committed by Julia Lawall
parent 4b2bd20c35
commit 7a2624e6de
1 changed files with 13 additions and 3 deletions
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16
scripts/coccinelle/api/alloc/zalloc-simple.cocci
View File

@ -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)
//-----------------------------------------------------------------