From: Stephen Rothwell <sfr@canb.auug.org.au>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux Next Mailing List <linux-next@vger.kernel.org>,
Kees Cook <keescook@chromium.org>,
Michael Ellerman <mpe@ellerman.id.au>,
PowerPC <linuxppc-dev@lists.ozlabs.org>,
Mathieu Malaterre <malat@debian.org>,
Nicholas Piggin <npiggin@gmail.com>
Subject: Re: linux-next: build warning after merge of the akpm tree
Date: Tue, 8 Dec 2020 23:01:57 +1100 [thread overview]
Message-ID: <20201208230157.42c42789@canb.auug.org.au> (raw)
In-Reply-To: <20201204210000.660293c6@canb.auug.org.au>
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Hi Stephen,
On Fri, 4 Dec 2020 21:00:00 +1100 Stephen Rothwell <sfr@canb.auug.org.au> wrote:
>
> Hi all,
>
> After merging the akpm tree, today's linux-next build (powerpc
> allyesconfig) produced warnings like this:
>
> ld: warning: orphan section `.data..Lubsan_data177' from `arch/powerpc/oprofile/op_model_pa6t.o' being placed in section `.data..Lubsan_data177'
>
> (lots of these latter ones)
781584 of them today!
> I don't know what produced these, but it is in the akpm-current or
> akpm trees.
Presumably the result of commit
186c3e18dba3 ("ubsan: enable for all*config builds")
from the akpm-current tree.
arch/powerpc/kernel/vmlinux.lds.S has:
#ifdef CONFIG_PPC32
.data : AT(ADDR(.data) - LOAD_OFFSET) {
DATA_DATA
#ifdef CONFIG_UBSAN
*(.data..Lubsan_data*)
*(.data..Lubsan_type*)
#endif
*(.data.rel*)
*(SDATA_MAIN)
added by commit
beba24ac5913 ("powerpc/32: Add .data..Lubsan_data*/.data..Lubsan_type* sections explicitly")
in 2018, but no equivalent for 64 bit.
I will try the following patch tomorrow:
From: Stephen Rothwell <sfr@canb.auug.org.au>
Date: Tue, 8 Dec 2020 22:58:24 +1100
Subject: [PATCH] powerpc: Add .data..Lubsan_data*/.data..Lubsan_type* sections explicitly
Similarly to commit
beba24ac5913 ("powerpc/32: Add .data..Lubsan_data*/.data..Lubsan_type* sections explicitly")
since CONFIG_UBSAN bits can now be enabled for all*config.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
---
arch/powerpc/kernel/vmlinux.lds.S | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index 3b4c26e94328..0318ba436f34 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -296,6 +296,10 @@ SECTIONS
#else
.data : AT(ADDR(.data) - LOAD_OFFSET) {
DATA_DATA
+#ifdef CONFIG_UBSAN
+ *(.data..Lubsan_data*)
+ *(.data..Lubsan_type*)
+#endif
*(.data.rel*)
*(.toc1)
*(.branch_lt)
--
2.29.2
--
Cheers,
Stephen Rothwell
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next prev parent reply other threads:[~2020-12-08 12:02 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-04 10:00 linux-next: build warning after merge of the akpm tree Stephen Rothwell
2020-12-05 5:19 ` Andrew Morton
2020-12-05 9:37 ` Stephen Rothwell
2020-12-07 12:08 ` Dmitry Vyukov
2020-12-07 12:38 ` Dmitry Vyukov
2020-12-07 12:52 ` Marco Elver
2020-12-09 10:06 ` Dmitry Vyukov
2020-12-08 12:01 ` Stephen Rothwell [this message]
2020-12-09 4:44 ` Michael Ellerman
2020-12-09 7:07 ` Stephen Rothwell
2020-12-10 0:19 ` Michael Ellerman
2020-12-10 21:17 ` Stephen Rothwell
2020-12-09 10:33 ` Stephen Rothwell
2020-12-09 18:56 ` Kees Cook
-- strict thread matches above, loose matches on Subject: below --
2021-01-28 8:46 Stephen Rothwell
2021-02-01 7:14 ` Vijayanand Jitta
2020-02-28 4:35 Stephen Rothwell
2020-02-28 5:23 ` Arjun Roy
2020-01-06 6:11 Stephen Rothwell
2020-01-06 6:07 Stephen Rothwell
2020-01-07 23:11 ` Andrew Morton
2020-01-08 14:52 ` Steven Price
2018-11-30 5:40 Stephen Rothwell
2018-11-30 14:52 ` Dave Rodgman
2017-08-01 6:02 Stephen Rothwell
2017-08-01 6:15 ` Huang, Ying
2017-08-01 21:15 ` Arnd Bergmann
2017-06-26 6:30 Stephen Rothwell
2017-06-26 23:57 ` Wei Yang
2014-05-19 8:13 Stephen Rothwell
2014-05-19 15:13 ` Davidlohr Bueso
2014-05-19 19:48 ` Andrew Morton
2014-05-19 20:56 ` Davidlohr Bueso
2014-05-19 21:17 ` Andrew Morton
2014-05-19 21:36 ` Stephen Rothwell
2014-05-19 22:38 ` Davidlohr Bueso
2013-04-18 8:03 Stephen Rothwell
2013-04-10 8:33 Stephen Rothwell
2013-04-10 8:18 Stephen Rothwell
2013-02-20 6:34 Stephen Rothwell
2013-02-20 14:37 ` Peter Jones
2013-01-23 6:33 Stephen Rothwell
2013-01-23 6:43 ` Tang Chen
2012-11-09 3:43 Stephen Rothwell
2012-11-09 10:00 ` Grant Likely
2012-10-25 3:35 Stephen Rothwell
2012-04-27 5:44 Stephen Rothwell
2012-04-27 6:22 ` Cyrill Gorcunov
2012-04-27 6:28 ` Stephen Rothwell
2012-04-27 6:40 ` Cyrill Gorcunov
2011-08-10 2:13 Stephen Rothwell
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