riscv: Do not overwrite initrd_start and initrd_end

[ 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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
index f0d2070866d49b170da74ae0e20e779f55a02199..0efa5b29d0a315f4236d4bf3475a2430a5265872 100644 (file)
--- 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;
 
-       if (__initramfs_size > 0) {
-               initrd_start = (unsigned long)(&__initramfs_start);
-               initrd_end = initrd_start + __initramfs_size;
-       }
-
        if (initrd_start >= initrd_end) {
                printk(KERN_INFO "initrd not found or empty");
                goto disable;