--- zzzz-none-000/linux-5.4.213/drivers/of/fdt.c	2022-09-15 10:04:56.000000000 +0000
+++ alder-5690pro-762/linux-5.4.213/drivers/of/fdt.c	2024-08-14 09:02:08.000000000 +0000
@@ -1046,6 +1046,7 @@
 	int l;
 	const char *p;
 	const void *rng_seed;
+	char *q = data;
 
 	pr_debug("search \"chosen\", depth: %d, uname: %s\n", depth, uname);
 
@@ -1059,6 +1060,16 @@
 	p = of_get_flat_dt_prop(node, "bootargs", &l);
 	if (p != NULL && l > 0)
 		strlcpy(data, p, min(l, COMMAND_LINE_SIZE));
+	p = of_get_flat_dt_prop(node, "bootargs-append", &l);
+	if (p != NULL && l > 0)
+		strlcat(data, p, min_t(int, strlen(data) + (int)l, COMMAND_LINE_SIZE));
+	p = of_get_flat_dt_prop(node, "bootargs-prepend", &l);
+	if (p != NULL && l > 0 && l < COMMAND_LINE_SIZE) {
+		/* XXX: This may truncate the command line. */
+		memmove(&q[l - 1], q, COMMAND_LINE_SIZE - l + 1);
+		memcpy(q, p, l - 1);
+		q[COMMAND_LINE_SIZE - 1] = 0;
+	}
 
 	/*
 	 * CONFIG_CMDLINE is meant to be a default in case nothing else
@@ -1117,6 +1128,20 @@
 		size -= PAGE_SIZE - (base & ~PAGE_MASK);
 		base = PAGE_ALIGN(base);
 	}
+
+
+#ifndef CONFIG_PHYS_ADDR_T_64BIT
+	if (base + size > ULONG_MAX) {
+		pr_crit("Truncating memory at 0x%08llx to fit in 32-bit physical address space\n",
+				(long long)base);
+		/*
+		 * To ensure bank->start + bank->size is representable in
+		 * 32 bits, we use ULONG_MAX as the upper limit rather than 4GB.
+		 * This means we lose a page after masking.
+		 */
+		size = ULONG_MAX - base;
+	}
+#endif
 	size &= PAGE_MASK;
 
 	if (base > MAX_MEMBLOCK_ADDR) {