The patch titled
Subject: checkpatch: add error on use of attribute((weak)) or __weak declarations
has been added to the -mm tree. Its filename is
checkpatch-add-error-on-use-of-attributeweak-or-__weak-declarations.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/checkpatch-add-error-on-use-of-attributeweak-or-__weak-declarations.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/checkpatch-add-error-on-use-of-attributeweak-or-__weak-declarations.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
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------------------------------------------------------
From: Joe Perches <joe@xxxxxxxxxxx>
Subject: 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@xxxxxxxxxxx>
Reported-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
scripts/checkpatch.pl | 9 +++++++++
1 file changed, 9 insertions(+)
diff -puN scripts/checkpatch.pl~checkpatch-add-error-on-use-of-attributeweak-or-__weak-declarations scripts/checkpatch.pl
--- a/scripts/checkpatch.pl~checkpatch-add-error-on-use-of-attributeweak-or-__weak-declarations
+++ a/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",
_
Patches currently in -mm which might be from joe@xxxxxxxxxxx are
origin.patch
mm-utilc-add-kstrimdup.patch
checkpatch-add-an-error-test-for-no-space-before-comma.patch
checkpatch-add-error-on-use-of-attributeweak-or-__weak-declarations.patch
fs-affs-amigaffsc-use-va_format-instead-of-buffer-vnsprintf.patch
linux-next.patch
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