linux-kernel - [PATCH v3 03/30] kho: warn if KHO is disabled due to an error

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Message-ID: <20250807014442.3829950-4-pasha.tatashin@soleen.com>
Date: Thu,  7 Aug 2025 01:44:09 +0000
From: Pasha Tatashin <pasha.tatashin@...een.com>
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Subject: [PATCH v3 03/30] 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.

Signed-off-by: Pasha Tatashin <pasha.tatashin@...een.com>
Acked-by: Mike Rapoport (Microsoft) <rppt@...nel.org>
---
 kernel/kexec_handover.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/kexec_handover.c b/kernel/kexec_handover.c
index 6240bc38305b..c2b7e8b86db0 100644
--- a/kernel/kexec_handover.c
+++ b/kernel/kexec_handover.c
@@ -565,6 +565,7 @@ static void __init kho_reserve_scratch(void)
 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;
 }
 
-- 
2.50.1.565.gc32cd1483b-goog