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| author | Joe Perches <joe@perches.com> | 2014-12-11 02:51:35 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-12-11 04:41:11 +0300 |
| commit | 619a908aa334c854594e690fdbf1fe37b0e3e740 (patch) | |
| tree | 460eebf94c133e2024b8ff5e2beee79f0cbcddc1 /scripts/checkpatch.pl | |
| parent | 2381097b6c9b8621797a717c0b199f780ecaa992 (diff) | |
| download | linux-619a908aa334c854594e690fdbf1fe37b0e3e740.tar.xz | |
checkpatch: add error on use of attribute((weak)) or __weak declarations
Using weak declarations can have unintended link defects. The __weak on
the declaration causes non-weak definitions to become weak.
Emit an error on its use.
Signed-off-by: Joe Perches <joe@perches.com>
Reported-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'scripts/checkpatch.pl')
| -rwxr-xr-x | scripts/checkpatch.pl | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 696254eee78b..8a577aa03bc6 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -4671,6 +4671,15 @@ sub process { } } +# Check for __attribute__ weak, or __weak declarations (may have link issues) + if ($^V && $^V ge 5.10.0 && + $line =~ /(?:$Declare|$DeclareMisordered)\s*$Ident\s*$balanced_parens\s*(?:$Attribute)?\s*;/ && + ($line =~ /\b__attribute__\s*\(\s*\(.*\bweak\b/ || + $line =~ /\b__weak\b/)) { + ERROR("WEAK_DECLARATION", + "Using weak declarations can have unintended link defects\n" . $herecurr); + } + # check for sizeof(&) if ($line =~ /\bsizeof\s*\(\s*\&/) { WARN("SIZEOF_ADDRESS", |