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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>
This commit is contained in:
Mateusz Kulikowski 2015-06-25 15:03:19 -07:00 committed by Linus Torvalds
parent 9e20a8535f
commit 8617cd09bc
1 changed files with 23 additions and 0 deletions
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23
scripts/checkpatch.pl
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@ -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 &&