From: Pasha Tatashin <pasha.tatashin@soleen.com>
Date: Fri, 8 Aug 2025 20:18:04 +0000 (+0000)
Subject: kho: warn if KHO is disabled due to an error
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=44958f2025ed3f29fc3e93bb1f6c16121d7847ad;p=users%2Fjedix%2Flinux-maple.git

kho: warn if KHO is disabled due to an error

During boot scratch area is allocated based on command line parameters or
auto calculated.  However, scratch area may fail to allocate, and in that
case KHO is disabled.  Currently, no warning is printed that KHO is
disabled, which makes it confusing for the end user to figure out why KHO
is not available.  Add the missing warning message.

Link: https://lkml.kernel.org/r/20250808201804.772010-4-pasha.tatashin@soleen.com
Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Acked-by: Pratyush Yadav <pratyush@kernel.org>
Cc: Alexander Graf <graf@amazon.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Baoquan He <bhe@redhat.com>
Cc: Changyuan Lyu <changyuanl@google.com>
Cc: Coiby Xu <coxu@redhat.com>
Cc: Dave Vasilevsky <dave@vasilevsky.ca>
Cc: Eric Biggers <ebiggers@google.com>
Cc: Kees Cook <kees@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/kernel/kexec_handover.c b/kernel/kexec_handover.c
index 65145972d6d6..ecd1ac210dbd 100644
--- a/kernel/kexec_handover.c
+++ b/kernel/kexec_handover.c
@@ -564,6 +564,7 @@ err_free_scratch_areas:
 err_free_scratch_desc:
 	memblock_free(kho_scratch, kho_scratch_cnt * sizeof(*kho_scratch));
 err_disable_kho:
+	pr_warn("Failed to reserve scratch area, disabling kexec handover\n");
 	kho_enable = false;
 }