修改led为gpio

hc

2024-10-12 a5969cabbb4660eab42b6ef0412cbbd1200cf14d

 kernel/arch/x86/include/asm/sections.h
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@@ -2,6 +2,8 @@
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 #ifndef _ASM_X86_SECTIONS_H
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 #define _ASM_X86_SECTIONS_H
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+#define arch_is_kernel_initmem_freed arch_is_kernel_initmem_freed
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+
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 #include <asm-generic/sections.h>
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 #include <asm/extable.h>
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@@ -11,7 +13,26 @@
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 #if defined(CONFIG_X86_64)
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 extern char __end_rodata_hpage_align[];
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-extern char __entry_trampoline_start[], __entry_trampoline_end[];
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 #endif
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+extern char __end_of_kernel_reserve[];
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+
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+extern unsigned long _brk_start, _brk_end;
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+
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+static inline bool arch_is_kernel_initmem_freed(unsigned long addr)
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+{
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+	/*
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+	 * If _brk_start has not been cleared, brk allocation is incomplete,
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+	 * and we can not make assumptions about its use.
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+	 */
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+	if (_brk_start)
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+		return 0;
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+
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+	/*
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+	 * After brk allocation is complete, space between _brk_end and _end
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+	 * is available for allocation.
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+	 */
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+	return addr >= _brk_end && addr < (unsigned long)&_end;
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+}
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+
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 #endif	/* _ASM_X86_SECTIONS_H */