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authorLinus Torvalds <torvalds@linux-foundation.org>2012-10-12 10:32:29 +0900
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-12 10:32:29 +0900
commitcbd8aca472134e666eee87462177f1be854ebbf8 (patch)
treefbe0dd2ffbd14eeb1b8ec5dbb39fe52b0cbb76e5 /scripts/coccinelle
parent35e9a274fdc9c8feb763e4970a32d7089f51393c (diff)
parent26de9c26bf8557584c1977da92f3ed1b752291cf (diff)
Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Pull kbuild misc changes from Michal Marek: "In the non-critical part of kbuild, I have - Some make coccicheck improvements and two new tests - Support for a cleaner html output in scripts/kernel-doc, named html5 (no, it does not play videos, yet) BTW, Randy wants to route further kernel-doc patches through the kbuild tree." * 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: Update SmPL/Coccinelle section of MAINTAINERS coccicheck: Add the rep+ctxt mode scripts/coccinelle/tests/odd_ptr_err.cocci: semantic patch for IS_ERR/PTR_ERR inconsistency scripts/tags.sh: Add magic for pci access functions scripts/coccinelle: ptr_ret: Add ternary operator version scripts/kernel-doc: drop maintainer scripts/kernel-doc: added support for html5
Diffstat (limited to 'scripts/coccinelle')
-rw-r--r--scripts/coccinelle/api/ptr_ret.cocci26
-rw-r--r--scripts/coccinelle/tests/odd_ptr_err.cocci65
2 files changed, 91 insertions, 0 deletions
diff --git a/scripts/coccinelle/api/ptr_ret.cocci b/scripts/coccinelle/api/ptr_ret.cocci
index cbfd08c7d8c7..15f076fdecbe 100644
--- a/scripts/coccinelle/api/ptr_ret.cocci
+++ b/scripts/coccinelle/api/ptr_ret.cocci
@@ -30,6 +30,13 @@ expression ptr;
- if (IS_ERR(ptr)) return PTR_ERR(ptr); return 0;
+ return PTR_RET(ptr);
+@depends on patch@
+expression ptr;
+@@
+
+- (IS_ERR(ptr) ? PTR_ERR(ptr) : 0)
++ PTR_RET(ptr)
+
@r1 depends on !patch@
expression ptr;
position p1;
@@ -44,6 +51,13 @@ position p2;
* if@p2 (IS_ERR(ptr)) return PTR_ERR(ptr); return 0;
+@r3 depends on !patch@
+expression ptr;
+position p3;
+@@
+
+* IS_ERR@p3(ptr) ? PTR_ERR(ptr) : 0
+
@script:python depends on org@
p << r1.p1;
@@
@@ -57,6 +71,12 @@ p << r2.p2;
coccilib.org.print_todo(p[0], "WARNING: PTR_RET can be used")
+@script:python depends on org@
+p << r3.p3;
+@@
+
+coccilib.org.print_todo(p[0], "WARNING: PTR_RET can be used")
+
@script:python depends on report@
p << r1.p1;
@@
@@ -68,3 +88,9 @@ p << r2.p2;
@@
coccilib.report.print_report(p[0], "WARNING: PTR_RET can be used")
+
+@script:python depends on report@
+p << r3.p3;
+@@
+
+coccilib.report.print_report(p[0], "WARNING: PTR_RET can be used")
diff --git a/scripts/coccinelle/tests/odd_ptr_err.cocci b/scripts/coccinelle/tests/odd_ptr_err.cocci
new file mode 100644
index 000000000000..e8dd8a6b28a2
--- /dev/null
+++ b/scripts/coccinelle/tests/odd_ptr_err.cocci
@@ -0,0 +1,65 @@
+/// PTR_ERR should access the value just tested by IS_ERR
+//# There can be false positives in the patch case, where it is the call
+//# IS_ERR that is wrong.
+///
+// Confidence: High
+// Copyright: (C) 2012 Julia Lawall, INRIA. GPLv2.
+// Copyright: (C) 2012 Gilles Muller, INRIA. GPLv2.
+// URL: http://coccinelle.lip6.fr/
+// Comments:
+// Options: -no_includes -include_headers
+
+virtual patch
+virtual context
+virtual org
+virtual report
+
+@depends on patch@
+expression e,e1;
+@@
+
+(
+if (IS_ERR(e)) { ... PTR_ERR(e) ... }
+|
+if (IS_ERR(e=e1)) { ... PTR_ERR(e) ... }
+|
+if (IS_ERR(e))
+ { ...
+ PTR_ERR(
+- e1
++ e
+ )
+ ... }
+)
+
+@r depends on !patch@
+expression e,e1;
+position p1,p2;
+@@
+
+(
+if (IS_ERR(e)) { ... PTR_ERR(e) ... }
+|
+if (IS_ERR(e=e1)) { ... PTR_ERR(e) ... }
+|
+*if (IS_ERR@p1(e))
+ { ...
+* PTR_ERR@p2(e1)
+ ... }
+)
+
+@script:python depends on org@
+p1 << r.p1;
+p2 << r.p2;
+@@
+
+cocci.print_main("inconsistent IS_ERR and PTR_ERR",p1)
+cocci.print_secs("PTR_ERR",p2)
+
+@script:python depends on report@
+p1 << r.p1;
+p2 << r.p2;
+@@
+
+msg = "inconsistent IS_ERR and PTR_ERR, PTR_ERR on line %s" % (p2[0].line)
+coccilib.report.print_report(p1[0],msg)