checkpatch: check usleep_range() arguments
usleep_range() shouldn't use the same args for min and max. Report it when it happens and when both args are decimal and min > max. Signed-off-by: Joe Perches <joe@perches.com> Cc: Yuval Mintz <yuvalmin@broadcom.com> Cc: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -3313,6 +3313,22 @@ sub process {
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}
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}
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# check usleep_range arguments
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if ($^V && $^V ge 5.10.0 &&
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defined $stat &&
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$stat =~ /^\+(?:.*?)\busleep_range\s*\(\s*($FuncArg)\s*,\s*($FuncArg)\s*\)/) {
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my $min = $1;
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my $max = $7;
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if ($min eq $max) {
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WARN("USLEEP_RANGE",
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"usleep_range should not use min == max args; see Documentation/timers/timers-howto.txt\n" . "$here\n$stat\n");
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} elsif ($min =~ /^\d+$/ && $max =~ /^\d+$/ &&
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$min > $max) {
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WARN("USLEEP_RANGE",
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"usleep_range args reversed, use min then max; see Documentation/timers/timers-howto.txt\n" . "$here\n$stat\n");
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}
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}
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# check for new externs in .c files.
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if ($realfile =~ /\.c$/ && defined $stat &&
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$stat =~ /^.\s*(?:extern\s+)?$Type\s+($Ident)(\s*)\(/s)
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