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| author |   Joe Perches <joe@perches.com> | 2015-04-16 12:44:42 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-17 09:03:58 -0400 |
| commit | c17893c7407fbe988f5901596c3e5e75c0dc0f67 (patch) | |
| tree | f3e590db15b6f5fac82efbc8b5353d9c382b715d /scripts | |
| parent | checkpatch: improve operator spacing check (diff) | |
| download | linux-dev-c17893c7407fbe988f5901596c3e5e75c0dc0f67.tar.xz linux-dev-c17893c7407fbe988f5901596c3e5e75c0dc0f67.zip | |
checkpatch: add a test for const with __read_mostly uses
const objects shouldn't be __read_mostly. They are read-only.
Marking these objects as __read_mostly causes section conflicts with LTO
linking.
So add a test to try to avoid this issue.
Signed-off-by: Joe Perches <joe@perches.com>
Cc: Andy Whitcroft <apw@shadowen.org>
Cc: Andi Kleen <andi@firstfloor.org>
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 78a951f80706..28516587baba 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -4791,6 +4791,16 @@ sub process { } } +# check for __read_mostly with const non-pointer (should just be const) + if ($line =~ /\b__read_mostly\b/ && + $line =~ /($Type)\s*$Ident/ && $1 !~ /\*\s*$/ && $1 =~ /\bconst\b/) { + if (ERROR("CONST_READ_MOSTLY", + "Invalid use of __read_mostly with const type\n" . $herecurr) && + $fix) { + $fixed[$fixlinenr] =~ s/\s+__read_mostly\b//; + } + } + # don't use __constant_<foo> functions outside of include/uapi/ if ($realfile !~ m@^include/uapi/@ && $line =~ /(__constant_(?:htons|ntohs|[bl]e(?:16|32|64)_to_cpu|cpu_to_[bl]e(?:16|32|64)))\s*\(/) { |