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| author | Joe Perches <joe@perches.com> | 2014-06-05 01:12:08 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-06-05 01:54:20 +0200 |
| commit | afc819ab0293be3bd5c16d9eba26f9d57f61c42a (patch) | |
| tree | 795f6294efe6ca19c15c8a6832702e7bfaf8d967 /scripts | |
| parent | checkpatch: add warning for kmalloc/kzalloc with multiply (diff) | |
| download | linux-afc819ab0293be3bd5c16d9eba26f9d57f61c42a.tar.xz linux-afc819ab0293be3bd5c16d9eba26f9d57f61c42a.zip | |
checkpatch: prefer kstrto<foo> to sscanf(buf, "%<lhuidx>", &bar);
Use the kstrto<foo> functions in preference to sscanf.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'scripts')
| -rwxr-xr-x | scripts/checkpatch.pl | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 77740252bbed..862cc7a740e2 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -4314,6 +4314,27 @@ sub process { "unchecked sscanf return value\n" . "$here\n$stat_real\n"); } +# check for simple sscanf that should be kstrto<foo> + if ($^V && $^V ge 5.10.0 && + defined $stat && + $line =~ /\bsscanf\b/) { + my $lc = $stat =~ tr@\n@@; + $lc = $lc + $linenr; + my $stat_real = raw_line($linenr, 0); + for (my $count = $linenr + 1; $count <= $lc; $count++) { + $stat_real = $stat_real . "\n" . raw_line($count, 0); + } + if ($stat_real =~ /\bsscanf\b\s*\(\s*$FuncArg\s*,\s*("[^"]+")/) { + my $format = $6; + my $count = $format =~ tr@%@%@; + if ($count == 1 && + $format =~ /^"\%(?i:ll[udxi]|[udxi]ll|ll|[hl]h?[udxi]|[udxi][hl]h?|[hl]h?|[udxi])"$/) { + WARN("SSCANF_TO_KSTRTO", + "Prefer kstrto<type> to single variable sscanf\n" . "$here\n$stat_real\n"); + } + } + } + # check for new externs in .h files. if ($realfile =~ /\.h$/ && $line =~ /^\+\s*(extern\s+)$Type\s*$Ident\s*\(/s) { |