From a5969cabbb4660eab42b6ef0412cbbd1200cf14d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 12 Oct 2024 07:10:09 +0000
Subject: [PATCH] 修改led为gpio
---
kernel/arch/x86/include/asm/sections.h | 23 ++++++++++++++++++++++-
1 files changed, 22 insertions(+), 1 deletions(-)
diff --git a/kernel/arch/x86/include/asm/sections.h b/kernel/arch/x86/include/asm/sections.h
index dde9f92..5abf130 100644
--- a/kernel/arch/x86/include/asm/sections.h
+++ b/kernel/arch/x86/include/asm/sections.h
@@ -2,6 +2,8 @@
#ifndef _ASM_X86_SECTIONS_H
#define _ASM_X86_SECTIONS_H
+#define arch_is_kernel_initmem_freed arch_is_kernel_initmem_freed
+
#include <asm-generic/sections.h>
#include <asm/extable.h>
@@ -11,7 +13,26 @@
#if defined(CONFIG_X86_64)
extern char __end_rodata_hpage_align[];
-extern char __entry_trampoline_start[], __entry_trampoline_end[];
#endif
+extern char __end_of_kernel_reserve[];
+
+extern unsigned long _brk_start, _brk_end;
+
+static inline bool arch_is_kernel_initmem_freed(unsigned long addr)
+{
+ /*
+ * If _brk_start has not been cleared, brk allocation is incomplete,
+ * and we can not make assumptions about its use.
+ */
+ if (_brk_start)
+ return 0;
+
+ /*
+ * After brk allocation is complete, space between _brk_end and _end
+ * is available for allocation.
+ */
+ return addr >= _brk_end && addr < (unsigned long)&_end;
+}
+
#endif /* _ASM_X86_SECTIONS_H */
--
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