git: ec2b3d786b23 - main - loader: Only warn for !FDT && !ACPI take two

The branch main has been updated by cperciva:

URL: https://cgit.FreeBSD.org/src/commit/?id=ec2b3d786b236ac64ff5d3e28e8d05e2293896d5

commit ec2b3d786b236ac64ff5d3e28e8d05e2293896d5
Author:     Colin Percival <cperciva@FreeBSD.org>
AuthorDate: 2026-01-19 01:19:03 +0000
Commit:     Colin Percival <cperciva@FreeBSD.org>
CommitDate: 2026-01-24 20:18:35 +0000

    loader: Only warn for !FDT && !ACPI take two
    
    For unclear reasons, we used to print two warnings about not having a
    DTB: First,
            printf("No valid device tree blob found!\n");
    and immediately later a second,
            printf("WARNING! Trying to fire up the kernel, but no "
                "device tree blob found!\n");
    
    A previous commit silenced the second warning in the event that the
    acpi.revision environment variable was set, on the theory that systems
    which have ACPI might not need a DTB; this commit silences the first
    of the two warnings under the same condition.
    
    Reviewed by:    andrew
    Fixes:  3989a3d81701 ("loader: Only warn when we have neither FDT nor ACPI")
    Sponsored by:   Amazon
    Differential Revision:  https://reviews.freebsd.org/D54772
---
 stand/fdt/fdt_loader_cmd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/stand/fdt/fdt_loader_cmd.c b/stand/fdt/fdt_loader_cmd.c
index 161c2435c410..a53bb2e651f2 100644
--- a/stand/fdt/fdt_loader_cmd.c
+++ b/stand/fdt/fdt_loader_cmd.c
@@ -993,7 +993,7 @@ fdt_copy(vm_offset_t va)
 	debugf("fdt_copy va 0x%08jx\n", (uintmax_t)va);
 	if (fdtp == NULL) {
 		err = fdt_setup_fdtp();
-		if (err) {
+		if (err && (getenv("acpi.revision") == NULL)) {
 			printf("No valid device tree blob found!\n");
 			return (0);
 		}