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ast@kernel.org, ziy@nvidia.com, yuzhao@google.com, baolin.wang@linux.alibaba.com, usamaarif642@gmail.com, joel.granados@kernel.org, richard.weiyang@gmail.com, geert+renesas@glider.be, tim.c.chen@linux.intel.com, linux@treblig.org, alexander.shishkin@linux.intel.com, lillian@star-ark.net, chenhuacai@kernel.org, francesco@valla.it, guoweikang.kernel@gmail.com, link@vivo.com, jpoimboe@kernel.org, masahiroy@kernel.org, brauner@kernel.org, thomas.weissschuh@linutronix.de, oleg@redhat.com, mjguzik@gmail.com, andrii@kernel.org, wangfushuai@baidu.com, linux-doc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org, linux-i2c@vger.kernel.org, linux-arch@vger.kernel.org, linux-modules@vger.kernel.org, rcu@vger.kernel.org, linux-nfs@vger.kernel.org, linux-rt-devel@lists.linux.dev Subject: [PATCH v17 04/47] dept: add lock dependency tracker APIs Date: Thu, 2 Oct 2025 17:12:04 +0900 Message-Id: <20251002081247.51255-5-byungchul@sk.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20251002081247.51255-1-byungchul@sk.com> References: <20251002081247.51255-1-byungchul@sk.com> X-Brightmail-Tracker: H4sIAAAAAAAAAzXSbUxTZxQH8D33Pvf2tqHLTUfGM3Bu60KW+DqXzh2jM/Jh8ybuA85kZuzD 7ORmbcabrTBYsqQICAOnpRvqBLWU2XS0EQayQWNNIbFTC6GlDGuVSgkysTCm0mrHm+0Wv/2S 8/+fnA+HoxV/MpmctuiwqCtSFyhZGZbNpVk2pqnCmreXf5DDWKUbQ0uHgwXfRTuCu7E6BE8W m2mo6VvFsGzySGAhcVsCqy4PgpN+Ew2OS5UUPO5cYaEpMsXCzNXdcDM+i8A6tULB4tAwDa2R cRrud9YiuOQJI3DZjrBwz9hDQ2DqRRiNzbNwvamBhTl/CwXmIy4GzjabEFS1dbDQN+GUgD+6 RIHXaKHg1AwLJ3/NgIS1XQKDbXcwWA3Z0DwUYGDSdiZ5lbkYPPa/JDB+ognDxblhBqLTJhbu /nGUgd8NExLounUVwcJohALHsWka6pwxDK7Qemg9+jOGuuUFBJ7eSQoCzhYWjnX2MBB2rDLg c3sZGLH7MHg91zBcuOmnIDIRZKB7aJCG+PGsXfnCk5rjWGjv/o0SHOccSFj814SEGmNSF7yz rOCKm7Fww0KExqGNQt+ZcYlQfSUkEcxdpUK3bZ3QdnmGElofxRghFH0/d32ebEe+WKAtE3Wb dx6QaaIjX5ScJeWVD+yMAY0q6hHHEV5FGsNlz2moldYjKcfyb5FgMEGnnM6/Trq/n2ZSpnnv GjLm35DyS3wOqV15TKWM+WzSMPkTm7Kcf5eM1Q+jlAn/GrF3uv/bI+W3kkDEi1NWJDM189XJ 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7iGK/xN4TfHO35UE/6yK483tcXxLqZfmcx+8o7eu2i1OOCCkqjIFzeK1yWLl4Mt9h8u4Y/pv DlKHXkkLEMNw7FJOlycqQCKGYudzb9+O4mFHsvO4pvP9ZNg4657LdXkWhj2DXcflTf7CwibY GM74qYQKW8Iu47oKOlDYHBvNORpc//aI2OVcZ6+bCFsamjH4cjETEleiiFoUqUrLVCtUqcsW aVOUWWmqY4v2p6sbUeiX7CfHzXeQvzOpFbEMkk2VeGK8SimpyNRmqVsRx+CySElyTbdSKjmg yDouaNL3ao6kCtpWNIchZLMkG3cKyVL2oCJDSBGEw4Lmf4oxoigdit/uW2C1V5y5RshXHRJl JExX+xasDETN/HjRhf/YNm+bUn5qzQ5TxchZMnlKpDlJUo4SnFcnuLidM9XxJXc2Hjpxf4XM aZSvH8g+9zki4kmi0eRPfBJMYHqOyNOtXXt0K9yCp9W8oSX2zS49fzpaPmqWG6s3GR/OPlq4 Zcwwe4uM0CoV8bG4Rqv4C17aBwtHAwAA X-CFilter-Loop: Reflected Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Wrap the base APIs for easier annotation on typical lock. Signed-off-by: Byungchul Park --- include/linux/dept_ldt.h | 78 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 include/linux/dept_ldt.h diff --git a/include/linux/dept_ldt.h b/include/linux/dept_ldt.h new file mode 100644 index 000000000000..8047d0a531f1 --- /dev/null +++ b/include/linux/dept_ldt.h @@ -0,0 +1,78 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Lock Dependency Tracker + * + * Started by Byungchul Park : + * + * Copyright (c) 2020 LG Electronics, Inc., Byungchul Park + * Copyright (c) 2024 SK hynix, Inc., Byungchul Park + */ + +#ifndef __LINUX_DEPT_LDT_H +#define __LINUX_DEPT_LDT_H + +#include + +#ifdef CONFIG_DEPT +#define LDT_EVT_L 1UL +#define LDT_EVT_R 2UL +#define LDT_EVT_W 1UL +#define LDT_EVT_RW (LDT_EVT_R | LDT_EVT_W) +#define LDT_EVT_ALL (LDT_EVT_L | LDT_EVT_RW) + +#define ldt_init(m, k, su, n) dept_map_init(m, k, su, n) +#define ldt_lock(m, sl, t, n, i) \ + do { \ + if (n) \ + dept_ecxt_enter_nokeep(m); \ + else if (t) \ + dept_ecxt_enter(m, LDT_EVT_L, i, "trylock", "unlock", sl);\ + else { \ + dept_wait(m, LDT_EVT_L, i, "lock", sl); \ + dept_ecxt_enter(m, LDT_EVT_L, i, "lock", "unlock", sl);\ + } \ + } while (0) + +#define ldt_rlock(m, sl, t, n, i, q) \ + do { \ + if (n) \ + dept_ecxt_enter_nokeep(m); \ + else if (t) \ + dept_ecxt_enter(m, LDT_EVT_R, i, "read_trylock", "read_unlock", sl);\ + else { \ + dept_wait(m, q ? LDT_EVT_RW : LDT_EVT_W, i, "read_lock", sl);\ + dept_ecxt_enter(m, LDT_EVT_R, i, "read_lock", "read_unlock", sl);\ + } \ + } while (0) + +#define ldt_wlock(m, sl, t, n, i) \ + do { \ + if (n) \ + dept_ecxt_enter_nokeep(m); \ + else if (t) \ + dept_ecxt_enter(m, LDT_EVT_W, i, "write_trylock", "write_unlock", sl);\ + else { \ + dept_wait(m, LDT_EVT_RW, i, "write_lock", sl); \ + dept_ecxt_enter(m, LDT_EVT_W, i, "write_lock", "write_unlock", sl);\ + } \ + } while (0) + +#define ldt_unlock(m, i) dept_ecxt_exit(m, LDT_EVT_ALL, i) + +#define ldt_downgrade(m, i) \ + do { \ + if (dept_ecxt_holding(m, LDT_EVT_W)) \ + dept_map_ecxt_modify(m, LDT_EVT_W, NULL, LDT_EVT_R, i, "downgrade", "re= ad_unlock", -1);\ + } while (0) + +#define ldt_set_class(m, n, k, sl, i) dept_map_ecxt_modify(m, LDT_EVT_ALL,= k, 0UL, i, "lock_set_class", "(any)unlock", sl) +#else /* !CONFIG_DEPT */ +#define ldt_init(m, k, su, n) do { (void)(k); } while (0) +#define ldt_lock(m, sl, t, n, i) do { } while (0) +#define ldt_rlock(m, sl, t, n, i, q) do { } while (0) +#define ldt_wlock(m, sl, t, n, i) do { } while (0) +#define ldt_unlock(m, i) do { } while (0) +#define ldt_downgrade(m, i) do { } while (0) +#define ldt_set_class(m, n, k, sl, i) do { } while (0) +#endif +#endif /* __LINUX_DEPT_LDT_H */ --=20 2.17.1