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dma-mapping: remove dma_zalloc_coherent()

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dma_zalloc_coherent() is no longer needed as it has no users because
dma_alloc_coherent() already zeroes out memory for us.

The Coccinelle grammar rule that used to check for dma_alloc_coherent()
+ memset() is modified so that it just tells the user that the memset is
not needed anymore.

Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Luis Chamberlain
2018-12-19 12:30:34 -08:00
committed by Christoph Hellwig
parent 07a85fe142
commit dfd32cad14
3 changed files with 5 additions and 23 deletions
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11
scripts/coccinelle/api/alloc/zalloc-simple.cocci
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@@ -69,15 +69,6 @@ statement S;
- x = (T)vmalloc(E1);
+ x = (T)vzalloc(E1);
|
- x = dma_alloc_coherent(E2,E1,E3,E4);
+ x = dma_zalloc_coherent(E2,E1,E3,E4);
|
- x = (T *)dma_alloc_coherent(E2,E1,E3,E4);
+ x = dma_zalloc_coherent(E2,E1,E3,E4);
|
- x = (T)dma_alloc_coherent(E2,E1,E3,E4);
+ x = (T)dma_zalloc_coherent(E2,E1,E3,E4);
|
- x = kmalloc_node(E1,E2,E3);
+ x = kzalloc_node(E1,E2,E3);
|
@@ -225,7 +216,7 @@ p << r2.p;
x << r2.x;
@@
msg="WARNING: dma_zalloc_coherent should be used for %s, instead of dma_alloc_coherent/memset" % (x)
msg="WARNING: dma_alloc_coherent use in %s already zeroes out memory, so memset is not needed" % (x)
coccilib.report.print_report(p[0], msg)
//-----------------------------------------------------------------