1///
2/// Use *_pool_zalloc rather than *_pool_alloc followed by memset with 0
3///
4// Copyright: (C) 2015 Intel Corp.  GPLv2.
5// Options: --no-includes --include-headers
6//
7// Keywords: dma_pool_zalloc, pci_pool_zalloc
8//
9
10virtual context
11virtual patch
12virtual org
13virtual report
14
15//----------------------------------------------------------
16//  For context mode
17//----------------------------------------------------------
18
19@depends on context@
20expression x;
21statement S;
22@@
23
24* x = \(dma_pool_alloc\|pci_pool_alloc\)(...);
25  if ((x==NULL) || ...) S
26* memset(x,0, ...);
27
28//----------------------------------------------------------
29//  For patch mode
30//----------------------------------------------------------
31
32@depends on patch@
33expression x;
34expression a,b,c;
35statement S;
36@@
37
38- x = dma_pool_alloc(a,b,c);
39+ x = dma_pool_zalloc(a,b,c);
40  if ((x==NULL) || ...) S
41- memset(x,0,...);
42
43@depends on patch@
44expression x;
45expression a,b,c;
46statement S;
47@@
48
49- x = pci_pool_alloc(a,b,c);
50+ x = pci_pool_zalloc(a,b,c);
51  if ((x==NULL) || ...) S
52- memset(x,0,...);
53
54//----------------------------------------------------------
55//  For org and report mode
56//----------------------------------------------------------
57
58@r depends on org || report@
59expression x;
60expression a,b,c;
61statement S;
62position p;
63@@
64
65 x = @p\(dma_pool_alloc\|pci_pool_alloc\)(a,b,c);
66 if ((x==NULL) || ...) S
67 memset(x,0, ...);
68
69@script:python depends on org@
70p << r.p;
71x << r.x;
72@@
73
74msg="%s" % (x)
75msg_safe=msg.replace("[","@(").replace("]",")")
76coccilib.org.print_todo(p[0], msg_safe)
77
78@script:python depends on report@
79p << r.p;
80x << r.x;
81@@
82
83msg="WARNING: *_pool_zalloc should be used for %s, instead of *_pool_alloc/memset" % (x)
84coccilib.report.print_report(p[0], msg)
85