[4/4] coccinelle: mm: scripts/coccinelle/api/alloc/pool_zalloc-simple.cocci

Commit Message

sostalle July 15, 2015, 9:14 p.m. UTC

add [pci|dma]_pool_zalloc coccinelle check.
replaces instances of [pci|dma]_pool_alloc() followed by memset(0)
with [pci|dma]_pool_zalloc().

Signed-off-by: Sean O. Stalley <[e-mail]>
---
 .../coccinelle/api/alloc/pool_zalloc-simple.cocci  | 84 ++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 scripts/coccinelle/api/alloc/pool_zalloc-simple.cocci

Patch

diff --git a/scripts/coccinelle/api/alloc/pool_zalloc-simple.cocci b/scripts/coccinelle/api/alloc/pool_zalloc-simple.cocci
new file mode 100644
index 0000000..9b7eb32
--- /dev/null
+++ b/scripts/coccinelle/api/alloc/pool_zalloc-simple.cocci
@@ -0,0 +1,84 @@ 
+///
+/// Use *_pool_zalloc rather than *_pool_alloc followed by memset with 0
+///
+// Copyright: (C) 2015 Intel Corp.  GPLv2.
+// Options: --no-includes --include-headers
+//
+// Keywords: dma_pool_zalloc, pci_pool_zalloc
+//
+
+virtual context
+virtual patch
+virtual org
+virtual report
+
+//----------------------------------------------------------
+//  For context mode
+//----------------------------------------------------------
+
+@depends on context@
+expression x;
+statement S;
+@@
+
+* x = \(dma_pool_alloc\|pci_pool_alloc\)(...);
+  if ((x==NULL) || ...) S
+* memset(x,0, ...);
+
+//----------------------------------------------------------
+//  For patch mode
+//----------------------------------------------------------
+
+@depends on patch@
+expression x;
+expression a,b,c;
+statement S;
+@@
+
+- x = dma_pool_alloc(a,b,c);
++ x = dma_pool_zalloc(a,b,c);
+  if ((x==NULL) || ...) S
+- memset(x,0,...);
+
+@depends on patch@
+expression x;
+expression a,b,c;
+statement S;
+@@
+
+- x = pci_pool_alloc(a,b,c);
++ x = pci_pool_zalloc(a,b,c);
+  if ((x==NULL) || ...) S
+- memset(x,0,...);
+
+//----------------------------------------------------------
+//  For org and report mode
+//----------------------------------------------------------
+
+@r depends on org || report@
+expression x;
+expression a,b,c;
+statement S;
+position p;
+@@
+
+ x = @p\(dma_pool_alloc\|pci_pool_alloc\)(a,b,c);
+ if ((x==NULL) || ...) S
+ memset(x,0, ...);
+
+@script:python depends on org@
+p << r.p;
+x << r.x;
+@@
+
+msg="%s" % (x)
+msg_safe=msg.replace("[","@(").replace("]",")")
+coccilib.org.print_todo(p[0], msg_safe)
+
+@script:python depends on report@
+p << r.p;
+x << r.x;
+@@
+
+msg="WARNING: *_pool_zalloc should be used for %s, instead of *_pool_alloc/memset" % (x)
+coccilib.report.print_report(p[0], msg)