linux-kernel - [RFC] arm: change some function and data to init section

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Message-Id: <1440488173-28825-1-git-send-email-yalin.wang2010@gmail.com>
Date:	Tue, 25 Aug 2015 15:36:13 +0800
From:	yalin wang <yalin.wang2010@...il.com>
To:	linux@....linux.org.uk, nico@...aro.org, catalin.marinas@....com,
	keescook@...omium.org, yalin.wang2010@...il.com,
	ard.biesheuvel@...aro.org, m.szyprowski@...sung.com,
	ggdavisiv@...il.com, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [RFC] arm: change some function and data to init section

This patch change some function and the related data to init section,
they are only called by free_initmem(), can be freed safely after
boot up.

Signed-off-by: yalin wang <yalin.wang2010@...il.com>
---
 arch/arm/mm/init.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 8a63b4c..7b505de 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -577,7 +577,7 @@ struct section_perm {
 	pmdval_t clear;
 };
 
-static struct section_perm nx_perms[] = {
+static struct section_perm nx_perms[] __initdata = {
 	/* Make pages tables, etc before _stext RW (set NX). */
 	{
 		.start	= PAGE_OFFSET,
@@ -680,7 +680,7 @@ static inline bool arch_has_strict_perms(void)
 	}								\
 }
 
-static inline void fix_kernmem_perms(void)
+static void __init fix_kernmem_perms(void)
 {
 	set_section_perms(nx_perms, prot);
 }
@@ -706,7 +706,7 @@ void set_kernel_text_ro(void)
 static inline void fix_kernmem_perms(void) { }
 #endif /* CONFIG_ARM_KERNMEM_PERMS */
 
-void free_tcmmem(void)
+static void __init free_tcmmem(void)
 {
 #ifdef CONFIG_HAVE_TCM
 	extern char __tcm_start, __tcm_end;
@@ -716,7 +716,7 @@ void free_tcmmem(void)
 #endif
 }
 
-void free_initmem(void)
+void __init_refok free_initmem(void)
 {
 	fix_kernmem_perms();
 	free_tcmmem();
@@ -728,9 +728,9 @@ void free_initmem(void)
 
 #ifdef CONFIG_BLK_DEV_INITRD
 
-static int keep_initrd;
+static int keep_initrd __initdata;
 
-void free_initrd_mem(unsigned long start, unsigned long end)
+void __init free_initrd_mem(unsigned long start, unsigned long end)
 {
 	if (!keep_initrd) {
 		if (start == initrd_start)
-- 
1.9.1

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