linux-kernel - [PATCH 3/3] s390:add missing CONFIG_STRICT_KERNEL_RWX for mark_rodata

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Date:   Tue, 29 May 2018 21:36:28 +0800
From:   nixiaoming <nixiaoming@...wei.com>
To:     <catalin.marinas@....com>, <will.deacon@....com>,
        <ard.biesheuvel@...aro.org>, <marc.zyngier@....com>,
        <james.morse@....com>, <kristina.martsenko@....com>,
        <steve.capper@....com>, <tglx@...utronix.de>, <mingo@...hat.com>,
        <hpa@...or.com>, <akpm@...ux-foundation.org>, <vbabka@...e.cz>,
        <mhocko@...e.com>, <dave.hansen@...ux.intel.com>,
        <dan.j.williams@...el.com>, <kirill.shutemov@...ux.intel.com>,
        <zhang.jia@...ux.alibaba.com>, <schwidefsky@...ibm.com>,
        <heiko.carstens@...ibm.com>, <gregkh@...uxfoundation.org>
CC:     <nixiaoming@...wei.com>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <x86@...nel.org>,
        <linux-s390@...r.kernel.org>
Subject: [PATCH 3/3] s390:add missing CONFIG_STRICT_KERNEL_RWX for mark_rodata_ro

mark_rodata_ro is only called by the function mark_readonly
when CONFIG_STRICT_KERNEL_RWX=y

if CONFIG_STRICT_KERNEL_RWX is not set
a compile warning may be triggered: unused function

Signed-off-by: nixiaoming <nixiaoming@...wei.com>
---
 arch/s390/mm/init.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index 3fa3e53..a96fc3f 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -116,6 +116,7 @@ void __init paging_init(void)
 	free_area_init_nodes(max_zone_pfns);
 }
 
+#ifdef CONFIG_STRICT_KERNEL_RWX
 void mark_rodata_ro(void)
 {
 	unsigned long size = __end_ro_after_init - __start_ro_after_init;
@@ -123,6 +124,7 @@ void mark_rodata_ro(void)
 	set_memory_ro((unsigned long)__start_ro_after_init, size >> PAGE_SHIFT);
 	pr_info("Write protected read-only-after-init data: %luk\n", size >> 10);
 }
+#endif
 
 void __init mem_init(void)
 {
-- 
2.10.1