linux-kernel - [PATCH] x86: remove orphan header file e820.h

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Message-ID: <20250421041419.3167094-1-changbin.du@huawei.com>
Date: Mon, 21 Apr 2025 12:14:19 +0800
From: Changbin Du <changbin.du@...wei.com>
To: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>,
	<x86@...nel.org>
CC: "H. Peter Anvin" <hpa@...or.com>, <linux-kernel@...r.kernel.org>, Changbin
 Du <changbin.du@...wei.com>
Subject: [PATCH] x86: remove orphan header file e820.h

The header arch/x86/include/uapi/asm/e820.h isn't used by any source file any
more. The e820 related items are defined in arch/x86/include/asm/e820/types.h.
So clean it up.

Signed-off-by: Changbin Du <changbin.du@...wei.com>
---
 arch/x86/include/uapi/asm/e820.h | 82 --------------------------------
 1 file changed, 82 deletions(-)
 delete mode 100644 arch/x86/include/uapi/asm/e820.h

diff --git a/arch/x86/include/uapi/asm/e820.h b/arch/x86/include/uapi/asm/e820.h
deleted file mode 100644
index 55bc66867156..000000000000
--- a/arch/x86/include/uapi/asm/e820.h
+++ /dev/null
@@ -1,82 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#ifndef _UAPI_ASM_X86_E820_H
-#define _UAPI_ASM_X86_E820_H
-#define E820MAP	0x2d0		/* our map */
-#define E820MAX	128		/* number of entries in E820MAP */
-
-/*
- * Legacy E820 BIOS limits us to 128 (E820MAX) nodes due to the
- * constrained space in the zeropage.  If we have more nodes than
- * that, and if we've booted off EFI firmware, then the EFI tables
- * passed us from the EFI firmware can list more nodes.  Size our
- * internal memory map tables to have room for these additional
- * nodes, based on up to three entries per node for which the
- * kernel was built: MAX_NUMNODES == (1 << CONFIG_NODES_SHIFT),
- * plus E820MAX, allowing space for the possible duplicate E820
- * entries that might need room in the same arrays, prior to the
- * call to sanitize_e820_map() to remove duplicates.  The allowance
- * of three memory map entries per node is "enough" entries for
- * the initial hardware platform motivating this mechanism to make
- * use of additional EFI map entries.  Future platforms may want
- * to allow more than three entries per node or otherwise refine
- * this size.
- */
-
-#ifndef __KERNEL__
-#define E820_X_MAX E820MAX
-#endif
-
-#define E820NR	0x1e8		/* # entries in E820MAP */
-
-#define E820_RAM	1
-#define E820_RESERVED	2
-#define E820_ACPI	3
-#define E820_NVS	4
-#define E820_UNUSABLE	5
-#define E820_PMEM	7
-
-/*
- * This is a non-standardized way to represent ADR or NVDIMM regions that
- * persist over a reboot.  The kernel will ignore their special capabilities
- * unless the CONFIG_X86_PMEM_LEGACY option is set.
- *
- * ( Note that older platforms also used 6 for the same type of memory,
- *   but newer versions switched to 12 as 6 was assigned differently.  Some
- *   time they will learn... )
- */
-#define E820_PRAM	12
-
-/*
- * reserved RAM used by kernel itself
- * if CONFIG_INTEL_TXT is enabled, memory of this type will be
- * included in the S3 integrity calculation and so should not include
- * any memory that BIOS might alter over the S3 transition
- */
-#define E820_RESERVED_KERN        128
-
-#ifndef __ASSEMBLER__
-#include <linux/types.h>
-struct e820entry {
-	__u64 addr;	/* start of memory segment */
-	__u64 size;	/* size of memory segment */
-	__u32 type;	/* type of memory segment */
-} __attribute__((packed));
-
-struct e820map {
-	__u32 nr_map;
-	struct e820entry map[E820_X_MAX];
-};
-
-#define ISA_START_ADDRESS	0xa0000
-#define ISA_END_ADDRESS		0x100000
-
-#define BIOS_BEGIN		0x000a0000
-#define BIOS_END		0x00100000
-
-#define BIOS_ROM_BASE		0xffe00000
-#define BIOS_ROM_END		0xffffffff
-
-#endif /* __ASSEMBLER__ */
-
-
-#endif /* _UAPI_ASM_X86_E820_H */
-- 
2.43.0