From: Uladzislau Rezki (Sony) <urezki@gmail.com>
Date: Mon, 23 Jun 2025 18:40:34 +0000 (+0200)
Subject: lib/test_vmalloc.c: use late_initcall() if built-in for init ordering
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2e728505494b21b874fa87fce233c63b43d74434;p=thirdparty%2Fkernel%2Flinux.git

lib/test_vmalloc.c: use late_initcall() if built-in for init ordering

When the vmalloc test code is compiled as a built-in, use late_initcall()
instead of module_init() to defer a vmalloc test execution until most
subsystems are up and running.

It avoids interfering with components that may not yet be initialized at
module_init() time.  For example, there was a recent report of memory
profiling infrastructure not being ready early enough leading to kernel
crash.

By using late_initcall() in the built-in case, we ensure the tests are run
at a safer point during a boot sequence.

Link: https://lkml.kernel.org/r/20250623184035.581229-1-urezki@gmail.com
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Reviewed-by: Baoquan He <bhe@redhat.com>
Cc: Harry Yoo <harry.yoo@oracle.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: David Wang <00107082@163.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/lib/test_vmalloc.c b/lib/test_vmalloc.c
index 1b0b59549aaf1..7264781750c96 100644
--- a/lib/test_vmalloc.c
+++ b/lib/test_vmalloc.c
@@ -598,7 +598,11 @@ static int __init vmalloc_test_init(void)
 	return IS_BUILTIN(CONFIG_TEST_VMALLOC) ? 0:-EAGAIN;
 }
 
+#ifdef MODULE
 module_init(vmalloc_test_init)
+#else
+late_initcall(vmalloc_test_init);
+#endif
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Uladzislau Rezki");