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| author | Joe Perches <joe@perches.com> | 2014-04-03 14:49:14 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-03 16:21:13 -0700 |
| commit | fbdb8138cf0c75a0cf21991ca05ecc9fdff6e070 (patch) | |
| tree | afc2cad92df13ce14f72908f56fd2264637ce805 /scripts/checkpatch.pl | |
| parent | 2435880fe5cd51cd73c403aa4c07eadc3de799db (diff) | |
| download | lwn-fbdb8138cf0c75a0cf21991ca05ecc9fdff6e070.tar.gz lwn-fbdb8138cf0c75a0cf21991ca05ecc9fdff6e070.zip | |
checkpatch: warn on uses of __constant_<foo> functions
Emit a warning when using any of these __constant_<foo> forms:
__constant_cpu_to_be[x]
__constant_cpu_to_le[x]
__constant_be[x]_to_cpu
__constant_le[x]_to_cpu
__constant_htons
__constant_ntohs
Using any of these outside of include/uapi/ isn't preferred as using the
function without __constant_ is identical when the argument is a
constant.
Signed-off-by: Joe Perches <joe@perches.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'scripts/checkpatch.pl')
| -rwxr-xr-x | scripts/checkpatch.pl | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 0b40af57e71e..1054283c6e70 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -3931,6 +3931,19 @@ sub process { } } +# don't use __constant_<foo> functions outside of include/uapi/ + if ($realfile !~ m@^include/uapi/@ && + $line =~ /(__constant_(?:htons|ntohs|[bl]e(?:16|32|64)_to_cpu|cpu_to_[bl]e(?:16|32|64)))\s*\(/) { + my $constant_func = $1; + my $func = $constant_func; + $func =~ s/^__constant_//; + if (WARN("CONSTANT_CONVERSION", + "$constant_func should be $func\n" . $herecurr) && + $fix) { + $fixed[$linenr - 1] =~ s/\b$constant_func\b/$func/g; + } + } + # prefer usleep_range over udelay if ($line =~ /\budelay\s*\(\s*(\d+)\s*\)/) { my $delay = $1; |