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From:   Sasha Levin <Alexander.Levin@microsoft.com>
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        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
CC:     Guenter Roeck <linux@roeck-us.net>,
        Palmer Dabbelt <palmer@sifive.com>,
        Sasha Levin <Alexander.Levin@microsoft.com>
Subject: [PATCH AUTOSEL 4.18 21/65] riscv: Do not overwrite initrd_start and
 initrd_end
Thread-Topic: [PATCH AUTOSEL 4.18 21/65] riscv: Do not overwrite initrd_start
 and initrd_end
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Date:   Mon, 1 Oct 2018 00:38:15 +0000
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From: Guenter Roeck <linux@roeck-us.net>

[ Upstream commit e866d3e84eb7c9588afb77604d417e8cc49fe216 ]

setup_initrd() overwrites initrd_start and initrd_end if __initramfs_size
is larger than 0, which is always true even if there is no embedded
initramfs. This prevents booting qemu with "-initrd" parameter.
Overwriting initrd_start and initrd_end is not necessary since
__initramfs_start and __initramfs_size are used directly in
populate_rootfs() to load the built-in initramfs, so just drop
that code.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 arch/riscv/kernel/setup.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
index f0d2070866d4..0efa5b29d0a3 100644
--- a/arch/riscv/kernel/setup.c
+++ b/arch/riscv/kernel/setup.c
@@ -64,15 +64,8 @@ atomic_t hart_lottery;
 #ifdef CONFIG_BLK_DEV_INITRD
 static void __init setup_initrd(void)
 {
-	extern char __initramfs_start[];
-	extern unsigned long __initramfs_size;
 	unsigned long size;
=20
-	if (__initramfs_size > 0) {
-		initrd_start =3D (unsigned long)(&__initramfs_start);
-		initrd_end =3D initrd_start + __initramfs_size;
-	}
-
 	if (initrd_start >=3D initrd_end) {
 		printk(KERN_INFO "initrd not found or empty");
 		goto disable;
--=20
2.17.1