Messages in this thread | | | Date | Thu, 23 Jun 2011 19:04:19 +0200 | Subject | Re: __packed vs. __attribute__((packed)) in kernel headers | From | richard -rw- weinberger <> |
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On Wed, Jun 22, 2011 at 8:34 AM, Markus Trippelsdorf <markus@trippelsdorf.de> wrote: > A recent commit 3627924acf70a changed __attribute__ ((packed)) to > __packed in some UBI headers. This breaks the build of busybox: > > 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 > /usr/include/mtd/ubi-user.h:372:3: error: conflicting types for ‘__packed’ > /usr/include/mtd/ubi-user.h:314:3: note: previous declaration of ‘__packed’ was here > ... > > But this kind of change is suggested by checkpatch.pl: > WARN("__packed is preferred over __attribute__((packed))\n > > One possible solution would be to let the "scripts/headers_install.pl" > script automatically substitute __packed with __attribute__((packed)): > > diff --git a/scripts/headers_install.pl b/scripts/headers_install.pl > index efb3be1..e0dc065 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/\s__packed/__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; > > Any thoughts? >
Hmm, this introduces a new error source. Whenever we change the definition of __packed we have to adjust headers_install.pl too.
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