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| author | Mateusz Kulikowski <mateusz.kulikowski@gmail.com> | 2015-06-26 01:03:19 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-06-26 03:00:42 +0300 |
| commit | 8617cd09bc874dd7204b83aa3ed5fdc38b79562f (patch) | |
| tree | f4c4508aa18a3dbc5e5d1f78984c8ca3fa7497d3 /scripts | |
| parent | 9e20a8535f3fdd88afe9fe17ae85c36bd37f4e71 (diff) | |
| download | linux-8617cd09bc874dd7204b83aa3ed5fdc38b79562f.tar.xz | |
checkpatch: suggest using eth_zero_addr() and eth_broadcast_addr()
Suggest using eth_zero_addr() or eth_broadcast_addr() instead of memset().
Signed-off-by: Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
Acked-by: Joe Perches <joe@perches.com>
Cc: David Miller <davem@davemloft.net>
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 | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 954f4914c4af..a81fc66e62cc 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -5165,6 +5165,29 @@ sub process { "Prefer ether_addr_equal() or ether_addr_equal_unaligned() over memcmp()\n" . "$here\n$stat\n") } +# check for memset(foo, 0x0, ETH_ALEN) that could be eth_zero_addr +# check for memset(foo, 0xFF, ETH_ALEN) that could be eth_broadcast_addr + if ($^V && $^V ge 5.10.0 && + defined $stat && + $stat =~ /^\+(?:.*?)\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/) { + + my $ms_val = $7; + + if ($ms_val =~ /^(?:0x|)0+$/i) { + if (WARN("PREFER_ETH_ZERO_ADDR", + "Prefer eth_zero_addr over memset()\n" . "$here\n$stat\n") && + $fix) { + $fixed[$fixlinenr] =~ s/\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*,\s*ETH_ALEN\s*\)/eth_zero_addr($2)/; + } + } elsif ($ms_val =~ /^(?:0xff|255)$/i) { + if (WARN("PREFER_ETH_BROADCAST_ADDR", + "Prefer eth_broadcast_addr() over memset()\n" . "$here\n$stat\n") && + $fix) { + $fixed[$fixlinenr] =~ s/\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*,\s*ETH_ALEN\s*\)/eth_broadcast_addr($2)/; + } + } + } + # typecasts on min/max could be min_t/max_t if ($^V && $^V ge 5.10.0 && defined $stat && |