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From: Sasha Levin <sashal@kernel.org>
To: stable@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Peter Oberparleiter <oberpar@linux.ibm.com>,
	Stephen Rothwell <sfr@canb.auug.org.au>,
	Sasha Levin <sashal@kernel.org>
Subject: [PATCH AUTOSEL 4.18 25/27] vmlinux.lds.h: Fix linker warnings about orphan .LPBX sections
Date: Mon, 22 Oct 2018 06:19:22 -0400	[thread overview]
Message-ID: <20181022101924.40531-25-sashal@kernel.org> (raw)
In-Reply-To: <20181022101924.40531-1-sashal@kernel.org>

From: Peter Oberparleiter <oberpar@linux.ibm.com>

[ Upstream commit 52c8ee5bad8f33d02c567f6609f43d69303fc48d ]

Enabling both CONFIG_LD_DEAD_CODE_DATA_ELIMINATION=y and
CONFIG_GCOV_PROFILE_ALL=y results in linker warnings:

  warning: orphan section `.data..LPBX1' being placed in
  section `.data..LPBX1'.

LD_DEAD_CODE_DATA_ELIMINATION adds compiler flag -fdata-sections. This
option causes GCC to create separate data sections for data objects,
including those generated by GCC internally for gcov profiling. The
names of these objects start with a dot (.LPBX0, .LPBX1), resulting in
section names starting with 'data..'.

As section names starting with 'data..' are used for specific purposes
in the Linux kernel, the linker script does not automatically include
them in the output data section, resulting in the "orphan section"
linker warnings.

Fix this by specifically including sections named "data..LPBX*" in the
data section.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Tested-by: Stephen Rothwell <sfr@canb.auug.org.au>
Tested-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 include/asm-generic/vmlinux.lds.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index a11f86014352..83b930988e21 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -70,7 +70,7 @@
  */
 #ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
 #define TEXT_MAIN .text .text.[0-9a-zA-Z_]*
-#define DATA_MAIN .data .data.[0-9a-zA-Z_]*
+#define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..LPBX*
 #define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]*
 #define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]*
 #define BSS_MAIN .bss .bss.[0-9a-zA-Z_]*
-- 
2.17.1


  parent reply	other threads:[~2018-10-22 10:20 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-22 10:18 [PATCH AUTOSEL 4.18 01/27] ARM: dts: imx53-qsb: disable 1.2GHz OPP Sasha Levin
2018-10-22 10:18 ` [PATCH AUTOSEL 4.18 02/27] s390/hibernate: fix error handling when suspend cpu != resume cpu Sasha Levin
2018-10-22 10:19 ` [PATCH AUTOSEL 4.18 03/27] perf report: Don't try to map ip to invalid map Sasha Levin
2018-10-22 10:19 ` [PATCH AUTOSEL 4.18 04/27] Input: i8042 - enable keyboard wakeups by default when s2idle is used Sasha Levin
2018-10-22 16:58   ` Dmitry Torokhov
2018-10-23 15:48     ` Sasha Levin
2018-10-22 10:19 ` [PATCH AUTOSEL 4.18 05/27] Input: mousedev - add a schedule point in mousedev_write() Sasha Levin
2018-10-22 10:19 ` [PATCH AUTOSEL 4.18 06/27] perf python: Use -Wno-redundant-decls to build with PYTHON=python3 Sasha Levin
2018-10-22 10:19 ` [PATCH AUTOSEL 4.18 07/27] perf record: Use unmapped IP for inline callchain cursors Sasha Levin
2018-10-22 10:19 ` [PATCH AUTOSEL 4.18 08/27] Input: evdev - add a schedule point in evdev_write() Sasha Levin
2018-10-22 17:02   ` Dmitry Torokhov
2018-10-23 15:49     ` Sasha Levin
2018-10-22 10:19 ` [PATCH AUTOSEL 4.18 09/27] Input: uinput - add a schedule point in uinput_inject_events() Sasha Levin
2018-10-22 10:19 ` [PATCH AUTOSEL 4.18 10/27] rxrpc: Don't check RXRPC_CALL_TX_LAST after calling rxrpc_rotate_tx_window() Sasha Levin
2018-10-22 10:19 ` [PATCH AUTOSEL 4.18 11/27] rxrpc: Carry call state out of locked section in rxrpc_rotate_tx_window() Sasha Levin
2018-10-22 10:19 ` [PATCH AUTOSEL 4.18 12/27] rxrpc: Only take the rwind and mtu values from latest ACK Sasha Levin
2018-10-22 10:19 ` [PATCH AUTOSEL 4.18 13/27] rxrpc: Fix connection-level abort handling Sasha Levin
2018-10-22 10:19 ` [PATCH AUTOSEL 4.18 14/27] KVM: x86: support CONFIG_KVM_AMD=y with CONFIG_CRYPTO_DEV_CCP_DD=m Sasha Levin
2018-10-22 10:19 ` [PATCH AUTOSEL 4.18 15/27] net: ena: fix warning in rmmod caused by double iounmap Sasha Levin
2018-10-22 10:19 ` [PATCH AUTOSEL 4.18 16/27] net: ena: fix rare bug when failed restart/resume is followed by driver removal Sasha Levin
2018-10-22 10:19 ` [PATCH AUTOSEL 4.18 17/27] net: ena: fix NULL dereference due to untimely napi initialization Sasha Levin
2018-10-22 10:19 ` [PATCH AUTOSEL 4.18 18/27] libertas: call into generic suspend code before turning off power Sasha Levin
2018-10-22 10:19 ` [PATCH AUTOSEL 4.18 19/27] gpio: Assign gpio_irq_chip::parents to non-stack pointer Sasha Levin
2018-10-22 10:19 ` [PATCH AUTOSEL 4.18 20/27] IB/mlx5: Unmap DMA addr from HCA before IOMMU Sasha Levin
2018-10-22 10:19 ` [PATCH AUTOSEL 4.18 21/27] rds: RDS (tcp) hangs on sendto() to unresponding address Sasha Levin
2018-10-22 10:19 ` [PATCH AUTOSEL 4.18 22/27] selftests: rtnetlink.sh explicitly requires bash Sasha Levin
2018-10-22 10:19 ` [PATCH AUTOSEL 4.18 23/27] selftests: udpgso_bench.sh " Sasha Levin
2018-10-22 10:19 ` [PATCH AUTOSEL 4.18 24/27] vmlinux.lds.h: Fix incomplete .text.exit discards Sasha Levin
2018-10-22 10:19 ` Sasha Levin [this message]
2018-10-22 10:19 ` [PATCH AUTOSEL 4.18 26/27] afs: Fix cell proc list Sasha Levin
2018-10-22 10:19 ` [PATCH AUTOSEL 4.18 27/27] fs/fat/fatent.c: add cond_resched() to fat_count_free_clusters() Sasha Levin

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