From: Joe Perches <joe@perches.com>
To: Andrew Morton <akpm@linux-foundation.org>,
Andy Whitcroft <apw@canonical.com>
Cc: David Miller <davem@davemloft.net>,
netdev <netdev@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH] checkpatch: Prefer ether_addr_copy to memcpy(foo, bar, ETH_ALEN)
Date: Tue, 21 Jan 2014 13:51:29 -0800 [thread overview]
Message-ID: <1390341089.31946.14.camel@joe-AO722> (raw)
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>
---
scripts/checkpatch.pl | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index be53ba7..0ea2a1e 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -4096,6 +4096,16 @@ 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 &&
reply other threads:[~2014-01-21 21:51 UTC|newest]
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