From patchwork Sat Nov 19 08:12:50 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Gow X-Patchwork-Id: 628930 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9B321C43217 for ; Sat, 19 Nov 2022 08:13:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229802AbiKSINF (ORCPT ); Sat, 19 Nov 2022 03:13:05 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33150 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229935AbiKSIND (ORCPT ); Sat, 19 Nov 2022 03:13:03 -0500 Received: from mail-yw1-x114a.google.com (mail-yw1-x114a.google.com [IPv6:2607:f8b0:4864:20::114a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8E5867DECD for ; Sat, 19 Nov 2022 00:13:00 -0800 (PST) Received: by mail-yw1-x114a.google.com with SMTP id 00721157ae682-38f92b4b3f2so69598797b3.1 for ; Sat, 19 Nov 2022 00:13:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=mxlxAlM6/dget+xcMGAu2YOt8fNlUAK4C29Oqcd00C8=; b=IcwXafexRAl664jaBoJyAa5mMQYLIYMkPXwqAvZb6o4ue+mpDnBlE0xs0UzTUu6YrL J/64TUXc9QJcwIpZb9Yj/DCH6Dwppd6ZMkmAPNMO9NLSQpa+UGz749sgxZn2x0YkNUIf LXPeai2EGngQkB7CfGiliNP7pMyGOorEuwIKH7/iimSqlhTNe9/StKThGkjm1J478yQT FjE1xZ26fMXjtNwEj/vs994FgwWwhpqoI2BaovX8NQreDY9YAYWcG+493mAuAS7O7+Dr a5zzfXgoWCsjb0963b6N3+kOMQOwst8wLhiAngZj5t5raxaGfEX5swv2inf1I1yUiP9c uOiA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=mxlxAlM6/dget+xcMGAu2YOt8fNlUAK4C29Oqcd00C8=; b=iOMY0/6id0xb5CvWQ8628sDg6aOT1EXarJg5e6vP5vcwsuOhZ3Ma7h17OpXLhxcoit Os4bRKstw9LEBZwmGa4vq0/jImzX91MudLe0sGkx76a2LlqYNNAwm/Yfgujmdev7b03X AXIgoSbgcFMbUc9XUxkAfDZp9ftC4GYGLLz35bmPTZFZLVMVEXT/OMLFTDHDwcbezfHK 1sbYO19EszqUBU+WVFjrDF+mz0UV7x3ELFB76azUZNrNnjupVEa8cKKYkfd8BG1b/MNu T4GdCoIHKWKPxPHWMJVtGkUZGd+SxBq11ecExX121tvZejsFIoVrc3+VtZTCoRCC3Rjm BCZQ== X-Gm-Message-State: ANoB5plprdRjWN1rRLSdonD1JRhp5DofjCAgqV1iMF2figfOQc6BQQP6 YjxMAIER9rbRbbwcBTRNml7PGorXSa3iJA== X-Google-Smtp-Source: AA0mqf67B7vUfx2Z0il/dhl9vKO2jAAok4f+bf6diQKTxBlXzTpb7pEn7mFBK76m9TQGjgkDGqNWmpmh5ibXWQ== X-Received: from slicestar.c.googlers.com ([fda3:e722:ac3:cc00:4f:4b78:c0a8:20a1]) (user=davidgow job=sendgmr) by 2002:a25:e807:0:b0:6ca:21b3:42ec with SMTP id k7-20020a25e807000000b006ca21b342ecmr9916189ybd.398.1668845579853; Sat, 19 Nov 2022 00:12:59 -0800 (PST) Date: Sat, 19 Nov 2022 16:12:50 +0800 Mime-Version: 1.0 X-Mailer: git-send-email 2.38.1.584.g0f3c55d4c2-goog Message-ID: <20221119081252.3864249-1-davidgow@google.com> Subject: [PATCH v3 1/3] kunit: Provide a static key to check if KUnit is actively running tests From: David Gow To: Brendan Higgins , Daniel Latypov , Shuah Khan Cc: David Gow , kunit-dev@googlegroups.com, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Kees Cook , linux-doc@vger.kernel.org, linux-mm@kvack.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org KUnit does a few expensive things when enabled. This hasn't been a problem because KUnit was only enabled on test kernels, but with a few people enabling (but not _using_) KUnit on production systems, we need a runtime way of handling this. Provide a 'kunit_running' static key (defaulting to false), which allows us to hide any KUnit code behind a static branch. This should reduce the performance impact (on other code) of having KUnit enabled to a single NOP when no tests are running. Note that, while it looks unintuitive, tests always run entirely within __kunit_test_suites_init(), so it's safe to decrement the static key at the end of this function, rather than in __kunit_test_suites_exit(), which is only there to clean up results in debugfs. Signed-off-by: David Gow --- This should be a no-op (other than a possible performance improvement) functionality-wise, and lays the groundwork for a more optimised static stub implementation. The remaining patches in the series add a kunit_get_current_test() function which is a more friendly and performant wrapper around current->kunit_test, and use this in the slub test. They also improve the documentation a bit. If there are no objections, we'll take the whole series via the KUnit tree. No changes since v2: https://lore.kernel.org/all/20221025071907.1251820-1-davidgow@google.com/ Changes since v1: https://lore.kernel.org/linux-kselftest/20221021072854.333010-1-davidgow@google.com/ - No changes in this patch. - Patch 2/3 is reworked, patch 3/3 is new. --- include/kunit/test.h | 4 ++++ lib/kunit/test.c | 6 ++++++ 2 files changed, 10 insertions(+) diff --git a/include/kunit/test.h b/include/kunit/test.h index d7f60e8aab30..b948c32a7b6b 100644 --- a/include/kunit/test.h +++ b/include/kunit/test.h @@ -16,6 +16,7 @@ #include #include #include +#include #include #include #include @@ -27,6 +28,9 @@ #include +/* Static key: true if any KUnit tests are currently running */ +extern struct static_key_false kunit_running; + struct kunit; /* Size of log associated with test. */ diff --git a/lib/kunit/test.c b/lib/kunit/test.c index 90640a43cf62..314717b63080 100644 --- a/lib/kunit/test.c +++ b/lib/kunit/test.c @@ -20,6 +20,8 @@ #include "string-stream.h" #include "try-catch-impl.h" +DEFINE_STATIC_KEY_FALSE(kunit_running); + #if IS_BUILTIN(CONFIG_KUNIT) /* * Fail the current test and print an error message to the log. @@ -612,10 +614,14 @@ int __kunit_test_suites_init(struct kunit_suite * const * const suites, int num_ return 0; } + static_branch_inc(&kunit_running); + for (i = 0; i < num_suites; i++) { kunit_init_suite(suites[i]); kunit_run_tests(suites[i]); } + + static_branch_dec(&kunit_running); return 0; } EXPORT_SYMBOL_GPL(__kunit_test_suites_init); From patchwork Sat Nov 19 08:12:51 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Gow X-Patchwork-Id: 626972 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 918A5C433FE for ; Sat, 19 Nov 2022 08:13:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232171AbiKSINL (ORCPT ); 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Sat, 19 Nov 2022 00:13:04 -0800 (PST) Date: Sat, 19 Nov 2022 16:12:51 +0800 In-Reply-To: <20221119081252.3864249-1-davidgow@google.com> Mime-Version: 1.0 References: <20221119081252.3864249-1-davidgow@google.com> X-Mailer: git-send-email 2.38.1.584.g0f3c55d4c2-goog Message-ID: <20221119081252.3864249-2-davidgow@google.com> Subject: [PATCH v3 2/3] kunit: Use the static key when retrieving the current test From: David Gow To: Brendan Higgins , Daniel Latypov , Shuah Khan Cc: David Gow , kunit-dev@googlegroups.com, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Kees Cook , linux-doc@vger.kernel.org, linux-mm@kvack.org, Jonathan Corbet , Sadiya Kazi Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org In order to detect if a KUnit test is running, and to access its context, the 'kunit_test' member of the current task_struct is used. Usually, this is accessed directly or via the kunit_fail_current_task() function. In order to speed up the case where no test is running, add a wrapper, kunit_get_current_test(), which uses the static key to fail early. Equally, Speed up kunit_fail_current_test() by using the static key. This should make it convenient for code to call this unconditionally in fakes or error paths, without worrying that this will slow the code down significantly. If CONFIG_KUNIT=n (or m), this compiles away to nothing. If CONFIG_KUNIT=y, it will compile down to a NOP (on most architectures) if no KUnit test is currently running. Note that kunit_get_current_test() does not work if KUnit is built as a module. This mirrors the existing restriction on kunit_fail_current_test(). Note that the definition of kunit_fail_current_test() still wraps an empty, inline function if KUnit is not built-in. This is to ensure that the printf format string __attribute__ will still work. Also update the documentation to suggest users use the new kunit_get_current_test() function, update the example, and to describe the behaviour when KUnit is disabled better. Cc: Jonathan Corbet Cc: Sadiya Kazi Signed-off-by: David Gow Reviewed-by: Daniel Latypov --- As-is, the only code which will be directly affected by this (via the kunit_fail_current_test() change) will be UBSAN's KUnit integration. Patches to port other tests to use kunit_get_current_test() will be sent separately (other than the SLUB one in patch 3/3). KASAN in particular are reworking their KUnit tests and integration, so we'll use this in a follow up to avoid introducing a conflict. Changes since v2: https://lore.kernel.org/all/20221025071907.1251820-2-davidgow@google.com/ - Only add kunit_get_current_test() when KUnit is built-in, as the static key isn't available otherwise. - I'm going to try to put together some patches to make things like this available when CONFIG_KUNIT=m in the future. - Also update the documentation to note this. Changes since v1: https://lore.kernel.org/linux-kselftest/20221021072854.333010-2-davidgow@google.com/ - Fix a missing '}' which broke everything. Thanks Kees, kernel test robot. - Add the new kunit_get_current_test() function, as most of the cases where we retrieve the current test (even to fail it) were accessing current->kunit_test directly, not using kunit_fail_current_test(). - Add some documentation comments. - Update the documentation in usage.rst. - The version in tips.rst was not updated, and will be removed: https://lore.kernel.org/linux-kselftest/20221025055844.1231592-1-davidgow@google.com/ --- Documentation/dev-tools/kunit/usage.rst | 25 +++++++----- include/kunit/test-bug.h | 53 +++++++++++++++++++++++-- 2 files changed, 66 insertions(+), 12 deletions(-) diff --git a/Documentation/dev-tools/kunit/usage.rst b/Documentation/dev-tools/kunit/usage.rst index 2737863ef365..e70014b82350 100644 --- a/Documentation/dev-tools/kunit/usage.rst +++ b/Documentation/dev-tools/kunit/usage.rst @@ -625,17 +625,21 @@ as shown in next section: *Accessing The Current Test*. Accessing The Current Test -------------------------- -In some cases, we need to call test-only code from outside the test file. -For example, see example in section *Injecting Test-Only Code* or if -we are providing a fake implementation of an ops struct. Using -``kunit_test`` field in ``task_struct``, we can access it via -``current->kunit_test``. +In some cases, we need to call test-only code from outside the test file, +for example, when providing a fake implementation of a function, or to fail +any current test from within an error handler. +We can do this via the ``kunit_test`` field in ``task_struct``, which we can +access using the ``kunit_get_current_test`` function in ``kunit/test-bug.h``. -The example below includes how to implement "mocking": +``kunit_get_current_test`` requires KUnit be built-in to the kernel, i.e. +``CONFIG_KUNIT=y``. It is safe to call even if KUnit is not enabled, is built as a module, +or no test is currently running, in which case it will quickly return ``NULL``. + +The example below uses this to implement a "mock" implementation of a function, ``foo``: .. code-block:: c - #include /* for current */ + #include /* for kunit_get_current_test */ struct test_data { int foo_result; @@ -644,7 +648,7 @@ The example below includes how to implement "mocking": static int fake_foo(int arg) { - struct kunit *test = current->kunit_test; + struct kunit *test = kunit_get_current_test(); struct test_data *test_data = test->priv; KUNIT_EXPECT_EQ(test, test_data->want_foo_called_with, arg); @@ -675,7 +679,7 @@ Each test can have multiple resources which have string names providing the same flexibility as a ``priv`` member, but also, for example, allowing helper functions to create resources without conflicting with each other. It is also possible to define a clean up function for each resource, making it easy to -avoid resource leaks. For more information, see Documentation/dev-tools/kunit/api/test.rst. +avoid resource leaks. For more information, see Documentation/dev-tools/kunit/api/resource.rst. Failing The Current Test ------------------------ @@ -703,3 +707,6 @@ structures as shown below: static void my_debug_function(void) { } #endif +Note that ``kunit_fail_current_test`` requires KUnit be built-in to the kernel, i.e. +``CONFIG_KUNIT=y``. It is safe to call even if KUnit is not enabled, is built as a module, +or no test is currently running, but will do nothing. diff --git a/include/kunit/test-bug.h b/include/kunit/test-bug.h index 5fc58081d511..87a953dceeaa 100644 --- a/include/kunit/test-bug.h +++ b/include/kunit/test-bug.h @@ -9,16 +9,63 @@ #ifndef _KUNIT_TEST_BUG_H #define _KUNIT_TEST_BUG_H -#define kunit_fail_current_test(fmt, ...) \ - __kunit_fail_current_test(__FILE__, __LINE__, fmt, ##__VA_ARGS__) - #if IS_BUILTIN(CONFIG_KUNIT) +#include /* For static branch */ +#include + +/* Static key if KUnit is running any tests. */ +extern struct static_key_false kunit_running; + +/** + * kunit_get_current_test() - Return a pointer to the currently-running + * KUnit test. + * + * If a KUnit test is running in the current task, returns a pointer to + * its associated struct kunit, which can then be passed to any KUnit function + * or assertion. If no test is running (or a test is running in a different + * task), returns NULL. + * + * This function is safe to call even when KUnit is disabled: it will compile + * down to nothing if CONFIG_KUNIT is not enabled, and will be very fast if + * no test is running. + */ +static inline struct kunit *kunit_get_current_test(void) +{ + if (!static_branch_unlikely(&kunit_running)) + return NULL; + + return current->kunit_test; +} + + +/** + * kunit_fail_current_test() - If a KUnit test is running, fail it. + * + * If a KUnit test is running in the current task, mark that test as failed. + * + * This macro will only work if KUnit is built-in (though the tests + * themselves can be modules). Otherwise, it compiles down to nothing. + */ +#define kunit_fail_current_test(fmt, ...) do { \ + if (static_branch_unlikely(&kunit_running)) { \ + __kunit_fail_current_test(__FILE__, __LINE__, \ + fmt, ##__VA_ARGS__); \ + } \ + } while (0) + + extern __printf(3, 4) void __kunit_fail_current_test(const char *file, int line, const char *fmt, ...); #else +static inline struct kunit *kunit_get_current_test(void) { return NULL; } + +/* We define this with an empty helper function so format string warnings work */ +#define kunit_fail_current_test(fmt, ...) \ + __kunit_fail_current_test(__FILE__, __LINE__, fmt, ##__VA_ARGS__) + static inline __printf(3, 4) void __kunit_fail_current_test(const char *file, int line, const char *fmt, ...) { From patchwork Sat Nov 19 08:12:52 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Gow X-Patchwork-Id: 628929 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 54381C4332F for ; Sat, 19 Nov 2022 08:13:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232576AbiKSINR (ORCPT ); Sat, 19 Nov 2022 03:13:17 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33256 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232052AbiKSINK (ORCPT ); Sat, 19 Nov 2022 03:13:10 -0500 Received: from mail-pl1-x649.google.com (mail-pl1-x649.google.com [IPv6:2607:f8b0:4864:20::649]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4B3637EBC7 for ; Sat, 19 Nov 2022 00:13:09 -0800 (PST) Received: by mail-pl1-x649.google.com with SMTP id x18-20020a170902ec9200b001869f20da7eso5498679plg.10 for ; Sat, 19 Nov 2022 00:13:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=HZT09dwWD5fIaFMw5MiqU60lisIB0ejJz2T/HMt9VF4=; b=SHtU6YYNKAEepXdm5HbRFnuAyJFQdgO+1wedLhMpRsszD6ADUFWgk+3Dk2eyg23L4C zABv2VQZoq1xk7m9WvhdFXtEOjqkkRv7G5nWIow9W96ux/+b98E53LvWytC2S4a6h04r zB4vTdApfRXZH7pB+ZryafnleYvVDTkZGvhF74jyYCJAm2CuHpmFMED7k0JsoYO/yiTs ad0L59iP04zGlyxAB7bv/LMHHuEgs7zBVIQDhZWBX89Lj4G42i/ICeB0VmRucNP1g2An 1t2Tfm6nmhgKRrF4oWPqvjeR2y4x9QOOTpjql3bpcBMpiyRGomB6M2x+txB9lOy5kc1+ MRfA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=HZT09dwWD5fIaFMw5MiqU60lisIB0ejJz2T/HMt9VF4=; b=qiJTrirh8pBhNjb9Nr8/ohx5D6ekg9THyxC+IL3W4r6YEVT8SalqdRCWB5GopQoVm3 8PzZJTfbfe712061Xlgm43rY0nwT2AJNNPCi7ovyrZtm/kaYsEmMPpDtWLePSMViOiFA C1Wzawo7sVxXEfE9zzy0lrOD5HJC5GmwZr9cycRsG6nTAllVwrPOv47IY85NPoTcdsV+ 0taPNCo4rEZ8WrRY0hUORQeY5CKyVHeb5qBCqvRVSJSzKxMXPb1uyTHCO4txd4NMlHzJ 1/hJFJK46K5kmlXKmiak3qdHbz96unSQbArOkLcBH3T8pH023AQi4U56TxAxLXfsTKj4 0qUA== X-Gm-Message-State: ANoB5pmMlZ6H9sPP8k1mDKVnZzVK7cU57CiCwGWhiybXSloGhffCeV9C l+DFC6LIu+X+lis7KzM+MuqhOBFmISq9Tg== X-Google-Smtp-Source: AA0mqf6d0TFeFJe2lky/Uxlh+yxajwOJpZKYlUcAsY4hA8k+GJ+0dKXuSI5wzfJrQ5yVpEF7+GNMYaRxd/NUbA== X-Received: from slicestar.c.googlers.com ([fda3:e722:ac3:cc00:4f:4b78:c0a8:20a1]) (user=davidgow job=sendgmr) by 2002:aa7:9f9c:0:b0:53e:81ab:9419 with SMTP id z28-20020aa79f9c000000b0053e81ab9419mr11494527pfr.15.1668845588834; Sat, 19 Nov 2022 00:13:08 -0800 (PST) Date: Sat, 19 Nov 2022 16:12:52 +0800 In-Reply-To: <20221119081252.3864249-1-davidgow@google.com> Mime-Version: 1.0 References: <20221119081252.3864249-1-davidgow@google.com> X-Mailer: git-send-email 2.38.1.584.g0f3c55d4c2-goog Message-ID: <20221119081252.3864249-3-davidgow@google.com> Subject: [PATCH v3 3/3] mm: slub: test: Use the kunit_get_current_test() function From: David Gow To: Brendan Higgins , Daniel Latypov , Shuah Khan Cc: David Gow , kunit-dev@googlegroups.com, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Kees Cook , linux-doc@vger.kernel.org, linux-mm@kvack.org, Oliver Glitta , Hyeonggon Yoo <42.hyeyoo@gmail.com>, Christoph Lameter , Vlastimil Babka , David Rientjes , Andrew Morton Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Use the newly-added function kunit_get_current_test() instead of accessing current->kunit_test directly. This function uses a static key to return more quickly when KUnit is enabled, but no tests are actively running. There should therefore be a negligible performance impact to enabling the slub KUnit tests. Other than the performance improvement, this should be a no-op. Cc: Oliver Glitta Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com> Cc: Christoph Lameter Cc: Vlastimil Babka Cc: David Rientjes Cc: Andrew Morton Signed-off-by: David Gow Acked-by: Vlastimil Babka --- This is intended as an example use of the new function. Other users (such as KASAN) will be updated separately, as there would otherwise be conflicts. We'll take this whole series via the kselftest/kunit tree. Changes since v2: https://lore.kernel.org/all/20221025071907.1251820-3-davidgow@google.com/ - Get rid of a redundant 'likely' (Thanks Vlastimil Babka) - Use current->kunit_test directly when we already know a test is running. (Thanks Vlastimil Babka) - Add Vlastimil's Acked-by. There was no v1 of this patch. v1 of the series can be found here: https://lore.kernel.org/linux-kselftest/20221021072854.333010-1-davidgow@google.com/T/#u Cheers, -- David --- lib/slub_kunit.c | 1 + mm/slub.c | 3 ++- 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/lib/slub_kunit.c b/lib/slub_kunit.c index 7a0564d7cb7a..8fd19c8301ad 100644 --- a/lib/slub_kunit.c +++ b/lib/slub_kunit.c @@ -1,5 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 #include +#include #include #include #include diff --git a/mm/slub.c b/mm/slub.c index 157527d7101b..1887996cb703 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -39,6 +39,7 @@ #include #include #include +#include #include #include @@ -603,7 +604,7 @@ static bool slab_add_kunit_errors(void) { struct kunit_resource *resource; - if (likely(!current->kunit_test)) + if (!kunit_get_current_test()) return false; resource = kunit_find_named_resource(current->kunit_test, "slab_errors");