From 9a149fa4b0a2f3593d5e5b940c64364d4e08084a Mon Sep 17 00:00:00 2001
From: Tao Zeng <tao.zeng@amlogic.com>
Date: Fri, 7 Aug 2020 17:34:30 +0800
Subject: [PATCH] rodata: optimize memory usage of rodata section [3/5]

PD#SWPL-31258

Problem:
Kernel RO data is too large, about 4.5mb on 32bit and 5.9mb on
64bit kernel

Solution:
1, remove CONFIG_KALLSYMS_ALL in module.c, which can help to save
about 200KB module memory during runtime compared from /proc/pagetrce:
           3068,         c020edd8, module_alloc   -- before
           2776,         c020edd8, module_alloc   -- after

Verify:
x301

Signed-off-by: Tao Zeng <tao.zeng@amlogic.com>
Change-Id: I15acee0df76f74a04c10d8f290d10fc35d51a283
---
 kernel/module.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/kernel/module.c b/kernel/module.c
index be3b4356e5f8..6416fe1a5130 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2570,15 +2570,21 @@ static bool is_core_symbol(const Elf_Sym *src, const Elf_Shdr *sechdrs,
 	    || !src->st_name)
 		return false;
 
+#ifndef CONFIG_AMLOGIC_MODIFY
 #ifdef CONFIG_KALLSYMS_ALL
 	if (src->st_shndx == pcpundx)
 		return true;
 #endif
+#endif	/* ignore all symbols of moulde been loaded */
 
 	sec = sechdrs + src->st_shndx;
 	if (!(sec->sh_flags & SHF_ALLOC)
+#ifdef CONFIG_AMLOGIC_MODIFY
+	    || !(sec->sh_flags & SHF_EXECINSTR)
+#else
 #ifndef CONFIG_KALLSYMS_ALL
 	    || !(sec->sh_flags & SHF_EXECINSTR)
+#endif
 #endif
 	    || (sec->sh_entsize & INIT_OFFSET_MASK))
 		return false;