From 8617cd09bc874dd7204b83aa3ed5fdc38b79562f Mon Sep 17 00:00:00 2001 From: Mateusz Kulikowski Date: Thu, 25 Jun 2015 15:03:19 -0700 Subject: 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 Acked-by: Joe Perches Cc: David Miller Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- scripts/checkpatch.pl | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'scripts/checkpatch.pl') 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 && -- cgit v1.2.3