Merge branch 'for-5.14' of git://git.kernel.org/pub/scm/linux/kernel/…

…git/jlawall/linux

Pull coccinelle updates from Julia Lawall:
 "There are two new semantic patches:

   - minmax: To use min and max instead of ? :

   - swap: To use swap when possible

  Some other semantic patches have been updated to better conform to
  Linux kernel developer expectations or to make the explanation message
  more clear.

  Finally, there is a fix for the coccicheck script"

* 'for-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/jlawall/linux:
  coccinelle: api: remove kobj_to_dev.cocci script
  scripts: coccicheck: fix troubles on non-English builds
  coccinelle: misc: minmax: suppress patch generation for err returns
  drop unneeded *s
  coccinelle: irqf_oneshot: reduce the severity due to false positives
  coccinelle: misc: add swap script
  coccinelle: misc: update uninitialized_var.cocci documentation
  coccinelle: misc: restrict patch mode in flexible_array.cocci
  coccinelle: misc: add minmax script

scripts/coccicheck

@@ -87,7 +87,7 @@ else
     fi
 
     # Use only one thread per core by default if hyperthreading is enabled
-    THREADS_PER_CORE=$(lscpu | grep "Thread(s) per core: " | tr -cd "[:digit:]")
+    THREADS_PER_CORE=$(LANG=C lscpu | grep "Thread(s) per core: " | tr -cd "[:digit:]")
     if [ -z "$J" ]; then
         NPROC=$(getconf _NPROCESSORS_ONLN)
 	if [ $THREADS_PER_CORE -gt 1 -a $NPROC -gt 4 ] ; then

scripts/coccinelle/free/kfree.cocci

@@ -22,9 +22,9 @@ position p1;
 @@
 
 (
-* kfree@p1(E)
+ kfree@p1(E)
 |
-* kfree_sensitive@p1(E)
+ kfree_sensitive@p1(E)
 )
 
 @print expression@
@@ -66,9 +66,9 @@ position ok;
 
 while (1) { ...
 (
-* kfree@ok(E)
+ kfree@ok(E)
 |
-* kfree_sensitive@ok(E)
+ kfree_sensitive@ok(E)
 )
   ... when != break;
       when != goto l;
@@ -84,9 +84,9 @@ position free.p1!=loop.ok,p2!={print.p,sz.p};
 @@
 
 (
-* kfree@p1(E,...)
+ kfree@p1(E,...)
 |
-* kfree_sensitive@p1(E,...)
+ kfree_sensitive@p1(E,...)
 )
 ...
 (

scripts/coccinelle/misc/flexible_array.cocci

@@ -51,21 +51,40 @@ position p : script:python() { relevant(p) };
   };
 )
 
+@only_field depends on patch@
+identifier name, array;
+type T;
+position q;
+@@
+
+(
+  struct name {@q
+    T array[0];
+  };
+|
+  struct {@q
+    T array[0];
+  };
+)
+
 @depends on patch@
 identifier name, array;
 type T;
 position p : script:python() { relevant(p) };
+// position @q with rule "only_field" simplifies
+// handling of bitfields, arrays, etc.
+position q != only_field.q;
 @@
 
 (
-  struct name {
+  struct name {@q
     ...
     T array@p[
 -       0
     ];
   };
 |
-  struct {
+  struct {@q
     ...
     T array@p[
 -       0

scripts/coccinelle/misc/irqf_oneshot.cocci

@@ -103,11 +103,11 @@ devm_request_threaded_irq@p(dev, irq, NULL, ...)
 @script:python depends on org@
 p << match.p;
 @@
-msg = "ERROR: Threaded IRQ with no primary handler requested without IRQF_ONESHOT"
+msg = "WARNING: Threaded IRQ with no primary handler requested without IRQF_ONESHOT (unless it is nested IRQ)"
 coccilib.org.print_todo(p[0],msg)
 
 @script:python depends on report@
 p << match.p;
 @@
-msg = "ERROR: Threaded IRQ with no primary handler requested without IRQF_ONESHOT"
+msg = "WARNING: Threaded IRQ with no primary handler requested without IRQF_ONESHOT (unless it is nested IRQ)"
 coccilib.report.print_report(p[0],msg)

scripts/coccinelle/misc/minmax.cocci

@@ -0,0 +1,222 @@
+// SPDX-License-Identifier: GPL-2.0-only
+///
+/// Check for opencoded min(), max() implementations.
+/// Generated patches sometimes require adding a cast to fix compile warning.
+/// Warnings/patches scope intentionally limited to a function body.
+///
+// Confidence: Medium
+// Copyright: (C) 2021 Denis Efremov ISPRAS
+// Options: --no-includes --include-headers
+//
+// Keywords: min, max
+//
+
+
+virtual report
+virtual org
+virtual context
+virtual patch
+
+@rmax depends on !patch@
+identifier func;
+expression x, y;
+binary operator cmp = {>, >=};
+position p;
+@@
+
+func(...)
+{
+	<...
+*	((x) cmp@p (y) ? (x) : (y))
+	...>
+}
+
+@rmaxif depends on !patch@
+identifier func;
+expression x, y;
+expression max_val;
+binary operator cmp = {>, >=};
+position p;
+@@
+
+func(...)
+{
+	<...
+*	if ((x) cmp@p (y)) {
+*		max_val = (x);
+*	} else {
+*		max_val = (y);
+*	}
+	...>
+}
+
+@rmin depends on !patch@
+identifier func;
+expression x, y;
+binary operator cmp = {<, <=};
+position p;
+@@
+
+func(...)
+{
+	<...
+*	((x) cmp@p (y) ? (x) : (y))
+	...>
+}
+
+@rminif depends on !patch@
+identifier func;
+expression x, y;
+expression min_val;
+binary operator cmp = {<, <=};
+position p;
+@@
+
+func(...)
+{
+	<...
+*	if ((x) cmp@p (y)) {
+*		min_val = (x);
+*	} else {
+*		min_val = (y);
+*	}
+	...>
+}
+
+@pmax depends on patch@
+identifier func;
+expression x, y;
+binary operator cmp = {>=, >};
+@@
+
+func(...)
+{
+	<...
+-	((x) cmp (y) ? (x) : (y))
++	max(x, y)
+	...>
+}
+
+@pmaxif depends on patch@
+identifier func;
+expression x, y;
+expression max_val;
+binary operator cmp = {>=, >};
+@@
+
+func(...)
+{
+	<...
+-	if ((x) cmp (y)) {
+-		max_val = x;
+-	} else {
+-		max_val = y;
+-	}
++	max_val = max(x, y);
+	...>
+}
+
+// Don't generate patches for errcode returns.
+@errcode depends on patch@
+position p;
+identifier func;
+expression x;
+binary operator cmp = {<, <=};
+@@
+
+func(...)
+{
+	<...
+	return ((x) cmp@p 0 ? (x) : 0);
+	...>
+}
+
+@pmin depends on patch@
+identifier func;
+expression x, y;
+binary operator cmp = {<=, <};
+position p != errcode.p;
+@@
+
+func(...)
+{
+	<...
+-	((x) cmp@p (y) ? (x) : (y))
++	min(x, y)
+	...>
+}
+
+@pminif depends on patch@
+identifier func;
+expression x, y;
+expression min_val;
+binary operator cmp = {<=, <};
+@@
+
+func(...)
+{
+	<...
+-	if ((x) cmp (y)) {
+-		min_val = x;
+-	} else {
+-		min_val = y;
+-	}
++	min_val = min(x, y);
+	...>
+}
+
+@script:python depends on report@
+p << rmax.p;
+@@
+
+for p0 in p:
+	coccilib.report.print_report(p0, "WARNING opportunity for max()")
+
+@script:python depends on org@
+p << rmax.p;
+@@
+
+for p0 in p:
+	coccilib.org.print_todo(p0, "WARNING opportunity for max()")
+
+@script:python depends on report@
+p << rmaxif.p;
+@@
+
+for p0 in p:
+	coccilib.report.print_report(p0, "WARNING opportunity for max()")
+
+@script:python depends on org@
+p << rmaxif.p;
+@@
+
+for p0 in p:
+	coccilib.org.print_todo(p0, "WARNING opportunity for max()")
+
+@script:python depends on report@
+p << rmin.p;
+@@
+
+for p0 in p:
+	coccilib.report.print_report(p0, "WARNING opportunity for min()")
+
+@script:python depends on org@
+p << rmin.p;
+@@
+
+for p0 in p:
+	coccilib.org.print_todo(p0, "WARNING opportunity for min()")
+
+@script:python depends on report@
+p << rminif.p;
+@@
+
+for p0 in p:
+	coccilib.report.print_report(p0, "WARNING opportunity for min()")
+
+@script:python depends on org@
+p << rminif.p;
+@@
+
+for p0 in p:
+	coccilib.org.print_todo(p0, "WARNING opportunity for min()")