linux-kernel - [PATCH] kasan: export kasan

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Message-Id: <20210125112831.2156212-1-arnd@kernel.org>
Date:   Mon, 25 Jan 2021 12:28:13 +0100
From:   Arnd Bergmann <arnd@...nel.org>
To:     Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Andrey Konovalov <andreyknvl@...gle.com>,
        Marco Elver <elver@...gle.com>,
        Alexander Potapenko <glider@...gle.com>
Cc:     Arnd Bergmann <arnd@...db.de>, Dmitry Vyukov <dvyukov@...gle.com>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Walter Wu <walter-zh.wu@...iatek.com>,
        kasan-dev@...glegroups.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] kasan: export kasan_poison

From: Arnd Bergmann <arnd@...db.de>

The unit test module fails to build after adding a reference
to kasan_poison:

ERROR: modpost: "kasan_poison" [lib/test_kasan.ko] undefined!

Export this symbol to make it available to loadable modules.

Fixes: b9b322c2bba9 ("kasan: add match-all tag tests")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 mm/kasan/shadow.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/kasan/shadow.c b/mm/kasan/shadow.c
index de6b3f074742..32e7a5c148e6 100644
--- a/mm/kasan/shadow.c
+++ b/mm/kasan/shadow.c
@@ -94,6 +94,7 @@ void kasan_poison(const void *address, size_t size, u8 value)
 
 	__memset(shadow_start, value, shadow_end - shadow_start);
 }
+EXPORT_SYMBOL_GPL(kasan_poison);
 
 void kasan_unpoison(const void *address, size_t size)
 {
-- 
2.29.2