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checkpatch: prefer ether_addr_copy to memcpy(foo, bar, ETH_ALEN)

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ether_addr_copy was added for kernel version 3.14.  It's slightly
smaller/faster for some arches.  Encourage its use.

Signed-off-by: Joe Perches <joe@perches.com>
Cc: Andy Whitcroft <apw@canonical.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:
Joe Perches 2014-01-23 15:54:52 -08:00 committed by Linus Torvalds
parent bff5da4335
commit 98a9bba51c
1 changed files with 10 additions and 0 deletions
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scripts/checkpatch.pl
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@ -4087,6 +4087,16 @@ sub process {
}
}
# Check for memcpy(foo, bar, ETH_ALEN) that could be ether_addr_copy(foo, bar)
if ($^V && $^V ge 5.10.0 &&
$line =~ /^\+(?:.*?)\bmemcpy\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/s) {
if (WARN("PREFER_ETHER_ADDR_COPY",
"Prefer ether_addr_copy() over memcpy() if the Ethernet addresses are __aligned(2)\n" . $herecurr) &&
$fix) {
$fixed[$linenr - 1] =~ s/\bmemcpy\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/ether_addr_copy($2, $7)/;
}
}
# typecasts on min/max could be min_t/max_t
if ($^V && $^V ge 5.10.0 &&
defined $stat &&