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netdev@vger.kernel.org, matthew.brost@intel.com, her0gyugyu@gmail.com Subject: [PATCH v16 04/42] dept: add lock dependency tracker APIs Date: Mon, 19 May 2025 18:17:48 +0900 Message-Id: <20250519091826.19752-5-byungchul@sk.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20250519091826.19752-1-byungchul@sk.com> References: <20250519091826.19752-1-byungchul@sk.com> X-Brightmail-Tracker: H4sIAAAAAAAAAzWSa0yTZxTHed5rW6150+n2KCYzLV5gGYqB5czLNuMHn0RNTPxghKh0452t lkpaBTExgoIXGAQxpU6lFnBdpVVYq4tOS5DOIopasOM2YIMsKEJlAVqt4raC88vJL/n/z+98 ORJa4WMXSLT6/aJBr9YpORkjC86u+lT/MkGzom1IBaHJkwxcqHNy4L/qQOC8lk/B8N0N0Bke RfDm4WMazCY/gqqBPhqu+foReOxHOXjy1xwIhMY4aDEVc3Cspo6DtpEpCnoryilwuDbDH7Yh Bh6UVVNgHubgvPkYFR3PKIjYanmw5S2GQfs5HqYGkqClv4MFT88n8L2ll4PbnhYGfDcGKXjy ywUO+p3/svDAd4+BcGks+E+XsHDlRTUHI2EbDbbQGA/tjVYKfNYPob4gKjw+8Q8LzSWNFBy/ 9BMFge5bCBpO/kmBy9nBgTc0SoHbZaLh9Y93EQyWBnko/C7Cw/n8UgTFhRUMFPSmwJtX0cuV k0mQf7GegStvO9BXa4nT4kTEOzpGkwJ3Dnkd+o0jnrCVIferMbl5ro8nBQ09PLG6DhC3PYHU 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dZKE8GaUVCbQMnCkI+Q270agM7iyhxVcPS0+CCzQ9+X6GQmKf3ea8bbfwBvROZMh+97crlga9Ztv9m3TKdkBrp0Pelg== 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: 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", "read_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 */ -- 2.17.1