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authorJoe Perches <joe@perches.com>2014-01-23 15:54:52 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-23 16:36:58 -0800
commit98a9bba51c6e47f69c4fa22cc39a600d2e39536c (patch)
treeb390dcdd936226bca71243d0cac5b27f8a34d4f4 /scripts
parentbff5da4335256513497cc8c79f9a9d1665e09864 (diff)
checkpatch: prefer ether_addr_copy to memcpy(foo, bar, ETH_ALEN)
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>
Diffstat (limited to 'scripts')
-rwxr-xr-xscripts/checkpatch.pl10
1 files changed, 10 insertions, 0 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 05c99c0b7e6c..1dbd6d1cd1b5 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -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 &&

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