linux-kernel - Re: [PATCH v2] maple_tree: Reorganize testing to restore module testing

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Date:   Fri, 28 Oct 2022 14:58:41 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Liam Howlett <liam.howlett@...cle.com>
Cc:     "maple-tree@...ts.infradead.org" <maple-tree@...ts.infradead.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: Re: [PATCH v2] maple_tree: Reorganize testing to restore module
 testing

On Fri, 28 Oct 2022 18:04:30 +0000 Liam Howlett <liam.howlett@...cle.com> wrote:

> Along the development cycle, the testing code support for
> module/in-kernel compiles was removed.  Restore this functionality by
> moving any internal API tests to the userspace side, as well as
> threading tests.  Fix the lockdep issues and add a way to reduce memory
> usage so the tests can complete with KASAN + memleak detection.  Make
> the tests work on 32 bit hosts where possible and detect 32 bit hosts in
> the radix test suite.

My x86_64 allmodconfig failed with

ERROR: modpost: "mas_find_rev" [lib/test_maple_tree.ko] undefined!

so I did this:

--- a/lib/maple_tree.c~maple_tree-reorganize-testing-to-restore-module-testing-fix
+++ a/lib/maple_tree.c
@@ -6059,7 +6059,7 @@ void *mas_find_rev(struct ma_state *mas,
 	/* Retries on dead nodes handled by mas_next_entry */
 	return mas_prev_entry(mas, min);
 }
-EXPORT_SYMBOL_GPL(mas_find);
+EXPORT_SYMBOL_GPL(mas_find_rev);
 
 /**
  * mas_erase() - Find the range in which index resides and erase the entire
_