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Mon, 23 Jun 2025 11:40:37 -0700 (PDT) Received: from pc638.lan ([2001:9b1:d5a0:a500:2d8:61ff:fec9:d743]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-553e41bc2e3sm1500330e87.131.2025.06.23.11.40.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 23 Jun 2025 11:40:37 -0700 (PDT) From: "Uladzislau Rezki (Sony)" To: Andrew Morton Cc: linux-mm@kvack.org, LKML , Baoquan He , Uladzislau Rezki , Harry Yoo , Suren Baghdasaryan , David Wang <00107082@163.com> Subject: [PATCH 1/2] lib/test_vmalloc.c: Use late_initcall() if built-in for init ordering Date: Mon, 23 Jun 2025 20:40:34 +0200 Message-Id: <20250623184035.581229-1-urezki@gmail.com> X-Mailer: git-send-email 2.39.5 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 27AE2140008 X-Rspam-User: X-Rspamd-Server: rspam07 X-Stat-Signature: y8banxqs14rz1acgduffriohowhgh9un X-HE-Tag: 1750704039-223126 X-HE-Meta: U2FsdGVkX1+fGv5fo9unb8YHjXWv5CDaqKTMkgrAyWd9S+ng/SIqEjfmsoW6n5n3rwLx36BmT6AaP0iU8BIxMwevTFWfMoF/RnqDi8F9SMH6qQCEHrKMEEB7Gw18Xe/zWcgSQ2dr9brAgPq1C2w1Ops3ogs4/FDAUlkPowTavSCzMbeW/Q7f92snxalogedThf5L61Qbec99pBQ+tMg8tuHOiYEdhkHcHpe3cgGNA6S1roM+ck37nhdJq4xklQ6DPoX9dzPPaIQX+0EBtu0wmwD04nGR9wnpuf/yU/WLypbbV84fKRqsg5tW4P0KQ3lU+7ggVXp4wJwerDEhUyDG0dx20Sg6WUgbBpULy7Q2S4sLxobMeigDRiWKC9gE6pGHZLTPVsZZqmGtE77Ae/UwPC34XoMXFqBxzPtwHdp7NYILf1XprEsNzbjWyucjBbr/5n9obShH9Kl49r/6BQIyeITVwyUJ2jopyzZUro/FXPnPhAqOeO8o6iomMz5qZy6Symkh8TZzE9Je1ob9rEMxcn+iMPJ0HzJX4FG6sBwWf2tFTn4zHyxJW8j8lTNVpljKMQtyXO1AppK8xpOew4dBSNTxAC0V+IcG44EHrqHDr39Lg4yaJXLzvhnp1Hyn/d6cde333j4B6ggaS7degHREkFy8zz0RUYgiu5e85HCHaMmZZuJxP0X0b81lU3MXU15jHVT2Vy5d+1XK+wHh8QbQ3CxEWgu2cigP/ugrajFoRXikVaV31D7mLjBzHNoDjZyLkdTq4O1m0/Ku5u7yx5pVdoEXpbv3iIJQNsxJdSUaYEQdDm24f/y9/gNJp0s7KO//mnRcKooMuPXOBBX5fO3LRlIqnXuXJcnEGZtWNTKb3ovpRbnwmgkvgatqUiGmmRasq62h4a9NJi7XgTqKo5A6Ssh0sSpYKszFr2KnarPSU0sdt87vx/o7d1DxMyNshFRiZCL31wMrX6QT8Eu6dT9 OzyZ/otB 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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. Cc: Harry Yoo Cc: Suren Baghdasaryan Cc: David Wang <00107082@163.com> Signed-off-by: Uladzislau Rezki (Sony) --- lib/test_vmalloc.c | 4 ++++ 1 file changed, 4 insertions(+) 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"); -- 2.39.5