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| author | Joe Perches <joe@perches.com> | 2014-01-24 00:54:52 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-24 01:36:58 +0100 |
| commit | 98a9bba51c6e47f69c4fa22cc39a600d2e39536c (patch) | |
| tree | b390dcdd936226bca71243d0cac5b27f8a34d4f4 /scripts | |
| parent | checkpatch: add DT compatible string documentation checks (diff) | |
| download | linux-98a9bba51c6e47f69c4fa22cc39a600d2e39536c.tar.xz linux-98a9bba51c6e47f69c4fa22cc39a600d2e39536c.zip | |
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-x | scripts/checkpatch.pl | 10 |
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 && |