+ lib-test_vmallocc-use-late_initcall-if-built-in-for-init-ordering.patch added to mm-new branch

+ lib-test_vmallocc-use-late_initcall-if-built-in-for-init-ordering.patch added to mm-new branch

[Andrew Morton]

The patch titled
     Subject: lib/test_vmalloc.c: use late_initcall() if built-in for init ordering
has been added to the -mm mm-new branch.  Its filename is
     lib-test_vmallocc-use-late_initcall-if-built-in-for-init-ordering.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/lib-test_vmallocc-use-late_initcall-if-built-in-for-init-ordering.patch

This patch will later appear in the mm-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews.  Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.

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------------------------------------------------------
From: "Uladzislau Rezki (Sony)" <urezki@gmail.com>
Subject: lib/test_vmalloc.c: use late_initcall() if built-in for init ordering
Date: Mon, 23 Jun 2025 20:40:34 +0200

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>
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>
---

 lib/test_vmalloc.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/lib/test_vmalloc.c~lib-test_vmallocc-use-late_initcall-if-built-in-for-init-ordering
+++ a/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");
_

Patches currently in -mm which might be from urezki@gmail.com are

lib-test_vmallocc-use-late_initcall-if-built-in-for-init-ordering.patch
lib-test_vmallocc-restrict-default-test-mask-to-avoid-test-warnings.patch