linux-kernel - [PATCH RESEND 07/62] arm: init: remove ATAG

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Message-ID: <20250913003842.41944-8-safinaskar@gmail.com>
Date: Sat, 13 Sep 2025 00:37:46 +0000
From: Askar Safin <safinaskar@...il.com>
To: linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
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	patches@...ts.linux.dev
Subject: [PATCH RESEND 07/62] arm: init: remove ATAG_RAMDISK

Previous commit removed last reference to ATAG_RAMDISK,
so let's remove it

Signed-off-by: Askar Safin <safinaskar@...il.com>
---
 arch/arm/Kconfig                  |  2 +-
 arch/arm/include/uapi/asm/setup.h | 10 ----------
 arch/arm/kernel/atags_compat.c    |  8 --------
 3 files changed, 1 insertion(+), 19 deletions(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index b1f3df39ed40..afc161d76c5f 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1479,7 +1479,7 @@ config ARM_ATAG_DTB_COMPAT
 	depends on ARM_APPENDED_DTB
 	help
 	  Some old bootloaders can't be updated to a DTB capable one, yet
-	  they provide ATAGs with memory configuration, the ramdisk address,
+	  they provide ATAGs with memory configuration,
 	  the kernel cmdline string, etc.  Such information is dynamically
 	  provided by the bootloader and can't always be stored in a static
 	  DTB.  To allow a device tree enabled kernel to be used with such
diff --git a/arch/arm/include/uapi/asm/setup.h b/arch/arm/include/uapi/asm/setup.h
index 8e50e034fec7..3a70890ce80f 100644
--- a/arch/arm/include/uapi/asm/setup.h
+++ b/arch/arm/include/uapi/asm/setup.h
@@ -59,15 +59,6 @@ struct tag_videotext {
 	__u16		video_points;
 };
 
-/* describes how the ramdisk will be used in kernel */
-#define ATAG_RAMDISK	0x54410004
-
-struct tag_ramdisk {
-	__u32 flags;	/* bit 0 = load, bit 1 = prompt */
-	__u32 size;	/* decompressed ramdisk size in _kilo_ bytes */
-	__u32 start;	/* starting block of floppy-based RAM disk image */
-};
-
 /* describes where the compressed ramdisk image lives (virtual address) */
 /*
  * this one accidentally used virtual addresses - as such,
@@ -150,7 +141,6 @@ struct tag {
 		struct tag_core		core;
 		struct tag_mem32	mem;
 		struct tag_videotext	videotext;
-		struct tag_ramdisk	ramdisk;
 		struct tag_initrd	initrd;
 		struct tag_serialnr	serialnr;
 		struct tag_revision	revision;
diff --git a/arch/arm/kernel/atags_compat.c b/arch/arm/kernel/atags_compat.c
index 10da11c212cc..b9747061fa97 100644
--- a/arch/arm/kernel/atags_compat.c
+++ b/arch/arm/kernel/atags_compat.c
@@ -122,14 +122,6 @@ static void __init build_tag_list(struct param_struct *params, void *taglist)
 	tag->u.core.pagesize = params->u1.s.page_size;
 	tag->u.core.rootdev = params->u1.s.rootdev;
 
-	tag = tag_next(tag);
-	tag->hdr.tag = ATAG_RAMDISK;
-	tag->hdr.size = tag_size(tag_ramdisk);
-	tag->u.ramdisk.flags = (params->u1.s.flags & FLAG_RDLOAD ? 1 : 0) |
-			       (params->u1.s.flags & FLAG_RDPROMPT ? 2 : 0);
-	tag->u.ramdisk.size  = params->u1.s.ramdisk_size;
-	tag->u.ramdisk.start = params->u1.s.rd_start;
-
 	tag = tag_next(tag);
 	tag->hdr.tag = ATAG_INITRD;
 	tag->hdr.size = tag_size(tag_initrd);
-- 
2.47.2