Subject: + checkpatch-add-rules-to-check-init-attribute-and-const-defects.patch added to -mm tree
To: joe@xxxxxxxxxxx,ak@xxxxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Thu, 26 Sep 2013 14:47:37 -0700
The patch titled
Subject: checkpatch: add rules to check init attribute and const defects
has been added to the -mm tree. Its filename is
checkpatch-add-rules-to-check-init-attribute-and-const-defects.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/checkpatch-add-rules-to-check-init-attribute-and-const-defects.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/checkpatch-add-rules-to-check-init-attribute-and-const-defects.patch
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------------------------------------------------------
From: Joe Perches <joe@xxxxxxxxxxx>
Subject: checkpatch: add rules to check init attribute and const defects
People get this regularly wrong and it breaks the LTO builds, as it causes
a section attribute conflict.
Add --fix capability too.
Based on a patch from Andi Kleen.
Signed-off-by: Joe Perches <joe@xxxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
scripts/checkpatch.pl | 36 ++++++++++++++++++++++++++++++++++--
1 file changed, 34 insertions(+), 2 deletions(-)
diff -puN scripts/checkpatch.pl~checkpatch-add-rules-to-check-init-attribute-and-const-defects scripts/checkpatch.pl
--- a/scripts/checkpatch.pl~checkpatch-add-rules-to-check-init-attribute-and-const-defects
+++ a/scripts/checkpatch.pl
@@ -241,8 +241,11 @@ our $Sparse = qr{
__ref|
__rcu
}x;
-
-our $InitAttribute = qr{__(?:mem|cpu|dev|net_|)(?:initdata|initconst|init\b)};
+our $InitAttributePrefix = qr{__(?:mem|cpu|dev|net_|)};
+our $InitAttributeData = qr{$InitAttributePrefix(?:initdata\b)};
+our $InitAttributeConst = qr{$InitAttributePrefix(?:initconst\b)};
+our $InitAttributeInit = qr{$InitAttributePrefix(?:init\b)};
+our $InitAttribute = qr{$InitAttributeData|$InitAttributeConst|$InitAttributeInit};
# Notes to $Attribute:
# We need \b after 'init' otherwise 'initconst' will cause a false positive in a check
@@ -3759,6 +3762,35 @@ sub process {
}
}
+# check for $InitAttributeData (ie: __initdata) with const
+ if ($line =~ /\bconst\b/ && $line =~ /($InitAttributeData)/) {
+ my $attr = $1;
+ $attr =~ /($InitAttributePrefix)(.*)/;
+ my $attr_prefix = $1;
+ my $attr_type = $2;
+ if (ERROR("INIT_ATTRIBUTE",
+ "Use of const init definition must use ${attr_prefix}initconst\n" . $herecurr) &&
+ $fix) {
+ $fixed[$linenr - 1] =~
+ s/$InitAttributeData/${attr_prefix}initconst/;
+ }
+ }
+
+# check for $InitAttributeConst (ie: __initconst) without const
+ if ($line !~ /\bconst\b/ && $line =~ /($InitAttributeConst)/) {
+ my $attr = $1;
+ if (ERROR("INIT_ATTRIBUTE",
+ "Use of $attr requires a separate use of const\n" . $herecurr) &&
+ $fix) {
+ my $lead = $fixed[$linenr - 1] =~
+ /(^\+\s*(?:static\s+))/;
+ $lead = rtrim($1);
+ $lead = "$lead " if ($lead !~ /^\+$/);
+ $lead = "${lead}const ";
+ $fixed[$linenr - 1] =~ s/(^\+\s*(?:static\s+))/$lead/;
+ }
+ }
+
# prefer usleep_range over udelay
if ($line =~ /\budelay\s*\(\s*(\d+)\s*\)/) {
# ignore udelay's < 10, however
_
Patches currently in -mm which might be from joe@xxxxxxxxxxx are
origin.patch
kernel-timerc-convert-kmalloc_nodegfp_zero-to-kzalloc_node.patch
ksm-remove-redundant-__gfp_zero-from-kcalloc.patch
printk-report-console-names-during-cut-over.patch
kernel-printk-printkc-convert-to-pr_foo.patch
checkpatch-report-missing-spaces-around-trigraphs-with-strict.patch
checkpatch-extend-camelcase-types-and-ignore-existing-camelcase-uses-in-a-patch.patch
checkpatch-update-seq_foo-tests.patch
checkpatch-find-camelcase-definitions-of-struct-union-enum.patch
checkpatch-add-test-for-defines-of-arch_has_foo.patch
checkpatch-add-rules-to-check-init-attribute-and-const-defects.patch
kernel-modulec-use-pr_foo.patch
linux-next.patch
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