kho: convert __kho_abort() to return void

The internal helper __kho_abort() always returns 0 and has no failure
paths.  Its return value is ignored by __kho_finalize and checked
needlessly by kho_abort.

Change the return type to void to reflect that this function cannot fail,
and simplify kho_abort by removing dead error handling code.

Link: https://lkml.kernel.org/r/20251114190002.3311679-3-pasha.tatashin@soleen.com
Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Reviewed-by: Pratyush Yadav <pratyush@kernel.org>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Cc: Alexander Graf <graf@amazon.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Baoquan He <bhe@redhat.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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/kernel/liveupdate/kexec_handover.c b/kernel/liveupdate/kexec_handover.c
index 6ad45e12f53b4fce9638d9c979e97bae1dedd8b3..bc7f046a1313886e390a3f44b4374ecaa73f6f40 100644 (file)
--- a/kernel/liveupdate/kexec_handover.c
+++ b/kernel/liveupdate/kexec_handover.c
@@ -1117,20 +1117,16 @@ err_free_pages_array:
 }
 EXPORT_SYMBOL_GPL(kho_restore_vmalloc);
 
-static int __kho_abort(void)
+static void __kho_abort(void)
 {
        if (kho_out.preserved_mem_map) {
                kho_mem_ser_free(kho_out.preserved_mem_map);
                kho_out.preserved_mem_map = NULL;
        }
-
-       return 0;
 }
 
 int kho_abort(void)
 {
-       int ret = 0;
-
        if (!kho_enable)
                return -EOPNOTSUPP;
 
@@ -1138,10 +1134,7 @@ int kho_abort(void)
        if (!kho_out.finalized)
                return -ENOENT;
 
-       ret = __kho_abort();
-       if (ret)
-               return ret;
-
+       __kho_abort();
        kho_out.finalized = false;
 
        kho_debugfs_fdt_remove(&kho_out.dbg, kho_out.fdt);