linux-kernel - [PATCH AUTOSEL 4.18 73/76] nds32: linker script: GCOV kernel may refers data in _

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Message-ID: <20180924144751.164410-72-alexander.levin@microsoft.com>
Date:   Mon, 24 Sep 2018 14:48:44 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     Greentime Hu <greentime@...estech.com>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL 4.18 73/76] nds32: linker script: GCOV kernel may
 refers data in __exit

From: Greentime Hu <greentime@...estech.com>

[ Upstream commit 3350139c0ff3c95724b784f7109987d533cb3ecd ]

This patch is used to fix nds32 allmodconfig/allyesconfig build error
because GCOV kernel embeds counters in the kernel for each line
and a part of that embed in __exit text. So we need to keep the
EXIT_TEXT and EXIT_DATA  if CONFIG_GCOV_KERNEL=y.

Link: https://lkml.org/lkml/2018/9/1/125
Signed-off-by: Greentime Hu <greentime@...estech.com>
Reviewed-by: Masami Hiramatsu <mhiramat@...nel.org>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
 arch/nds32/kernel/vmlinux.lds.S | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/nds32/kernel/vmlinux.lds.S b/arch/nds32/kernel/vmlinux.lds.S
index 288313b886ef..9e90f30a181d 100644
--- a/arch/nds32/kernel/vmlinux.lds.S
+++ b/arch/nds32/kernel/vmlinux.lds.S
@@ -13,14 +13,26 @@ OUTPUT_ARCH(nds32)
 ENTRY(_stext_lma)
 jiffies = jiffies_64;
 
+#if defined(CONFIG_GCOV_KERNEL)
+#define NDS32_EXIT_KEEP(x)	x
+#else
+#define NDS32_EXIT_KEEP(x)
+#endif
+
 SECTIONS
 {
 	_stext_lma = TEXTADDR - LOAD_OFFSET;
 	. = TEXTADDR;
 	__init_begin = .;
 	HEAD_TEXT_SECTION
+	.exit.text : {
+		NDS32_EXIT_KEEP(EXIT_TEXT)
+	}
 	INIT_TEXT_SECTION(PAGE_SIZE)
 	INIT_DATA_SECTION(16)
+	.exit.data : {
+		NDS32_EXIT_KEEP(EXIT_DATA)
+	}
 	PERCPU_SECTION(L1_CACHE_BYTES)
 	__init_end = .;
 
-- 
2.17.1