* Re: [Bugme-new] [Bug 18942] New: change to include/linux/netdevice.h prevents compilation for ARM architecture with AEABI enabled
[not found] <bug-18942-10286@https.bugzilla.kernel.org/>
@ 2010-09-22 9:01 ` Andrew Morton
0 siblings, 0 replies; only message in thread
From: Andrew Morton @ 2010-09-22 9:01 UTC (permalink / raw)
To: Patrick McHardy; +Cc: bugzilla-daemon, bugme-daemon, netdev, linux-arm-kernel
(switched to email. Please respond via emailed reply-to-all, not via the
bugzilla web interface).
On Wed, 22 Sep 2010 08:39:05 GMT bugzilla-daemon@bugzilla.kernel.org wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=18942
>
> Summary: change to include/linux/netdevice.h prevents
> compilation for ARM architecture with AEABI enabled
> Product: Platform Specific/Hardware
> Version: 2.5
> Kernel Version: 2.6.35.4
> Platform: All
> OS/Version: Linux
> Tree: Mainline
> Status: NEW
> Severity: blocking
> Priority: P1
> Component: ARM
> AssignedTo: linux-arm-kernel@lists.arm.linux.org.uk
> ReportedBy: ilya@total-knowledge.com
> Regression: No
>
>
> I am trying to compile the latest kernel, and am running into the following
> error:
> In file included from include/linux/icmpv6.h:173,
> from include/linux/ipv6.h:220,
> from include/net/ipv6.h:16,
> from include/linux/sunrpc/clnt.h:25,
> from include/linux/nfs_fs.h:48,
> from init/do_mounts.c:20:
> include/linux/netdevice.h:1005: error: width of 'reg_state' exceeds its type
> include/linux/netdevice.h:1010: error: width of 'rtnl_link_state' exceeds its
> type
>
>
> There was a change not too long ago, which converted reg_state to a bitfield,
> which apparently doesn't work when -mabi=aapcs.
> I tested it with a gcc versions 4.2.0, 4.4.2, and 4.4.4 and it holds true for
> all of them.
>
> Here is simple test case:
> struct test {
> enum { NETREG_UNINITIALIZED=0,
> } reg_state:16;
> };
>
> int main(int argc, char** argv)
> {
> struct test tt;
> tt.reg_state=NETREG_UNINITIALIZED;
> return 0;
> }
>
> Compiles without -mabi=aapcs option, fails with.
>
Bummer. I guess that this abi requires that enums have `int' width for
some reason?
Does -mabi=aapcs actually get used, officially? All I can see in
Linus's tree is
z:/usr/src/linux-2.6.36-rc5> grep -r aapcs .
./arch/arm/Makefile:CFLAGS_ABI :=-mabi=aapcs-linux -mno-thumb-interwork
^ permalink raw reply [flat|nested] only message in thread