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kernel/linux: fix packed attribute in exported headers

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UBI headers (and maybe others as well) are broken because the 'packed'
attribute is not sanitised when the headers are exported to userspace.

Apply the fix from upstream:
  https://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commitdiff;h=f210735fe2f17a6225432ee3d1239bcf23a8659c

(Also, buildroot does the same, BTW)

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
This commit is contained in:
Yann E. MORIN" 2011-11-04 19:22:29 +01:00
parent 78e82d7c44
commit acf31bf885
1 changed files with 38 additions and 0 deletions
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38
patches/linux/3.0.8/100-headers_install-fix-__packed-in-exported-kernel-head.patch Normal file
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@ -0,0 +1,38 @@
commit f210735fe2f17a6225432ee3d1239bcf23a8659c
Author: Markus Trippelsdorf <markus@trippelsdorf.de>
Date: Fri Jun 24 15:51:00 2011 +0200
headers_install: fix __packed in exported kernel headers
checkpatch.pl warns about using __attribute__((packed)) in kernel
headers: "__packed is preferred over __attribute__((packed))". If one
follows that advice it could cause problems in the exported header
files, because the outside world doesn't know about this shortcut.
For example busybox will fail to compile:
CC miscutils/ubi_attach_detach.o
In file included from miscutils/ubi_attach_detach.c:27:0:
/usr/include/mtd/ubi-user.h:330:3: error: conflicting types for ‘__packed’
/usr/include/mtd/ubi-user.h:314:3: note: previous declaration of ‘__packed’ was here
...
Fix the problem by substituting __packed with __attribute__((packed)) in
the header_install.pl script.
Cc: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
CC: Joe Perches <joe@perches.com>
Signed-off-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Signed-off-by: Michal Marek <mmarek@suse.cz>
diff --git a/scripts/headers_install.pl b/scripts/headers_install.pl
index efb3be1..48462be 100644
--- a/scripts/headers_install.pl
+++ b/scripts/headers_install.pl
@@ -35,6 +35,7 @@ foreach my $file (@files) {
$line =~ s/([\s(])__iomem\s/$1/g;
$line =~ s/\s__attribute_const__\s/ /g;
$line =~ s/\s__attribute_const__$//g;
+ $line =~ s/\b__packed\b/__attribute__((packed))/g;
$line =~ s/^#include <linux\/compiler.h>//;
$line =~ s/(^|\s)(inline)\b/$1__$2__/g;
$line =~ s/(^|\s)(asm)\b(\s|[(]|$)/$1__$2__$3/g;