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linux-modules@vger.kernel.org, rcu@vger.kernel.org, linux-nfs@vger.kernel.org, linux-rt-devel@lists.linux.dev Subject: [PATCH v17 32/47] dept: assign unique dept_key to each distinct dma fence caller Date: Thu, 2 Oct 2025 17:12:32 +0900 Message-Id: <20251002081247.51255-33-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: H4sIAAAAAAAAAzWSa0hTYRjHe88579kcLg7L6KTdGEglZatWPN2kPoTvlyCqD5VkrTy44Zwx 01wULUvoosNWaTnTaSpDZ5fZh8rsskpqplmKrdLlxEYm0/Ky0pSaK7/9+D8//vw/PGJadgFH ijW6I4Jep9LKWQkj8YeXLZ+l9KgVntHFUHzLzsJZxzUMrTdrEEyaG0VQ8NZMwxVvLwuFfacY 6HsRD/7P9RgmC1Lgd/MbGsq8XTTcbfQgaOudCdbsBgxN+eUUFNyZA5bC0xRcqa2noMoYDZbm Ngw9tiIR/LGmwStPB4Z+n5kFx4cXCEbavRRcK+kMDpgcQeCx/8FgtPzE8K6mlYE3D2oxeLvd wWUX8zBcGvAh6A9U0VA1OigC249CDJUjAzQ0W1qCZPNjcNg7WHB1DYvANe6iICd3TASWUyYE Z58H6M0KkvNukiX2Ejsiv8fNiDQErAxxlfPkflGXiFgdGaTOFkNuPOyjSNnQKCYf+zcRR/U5 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 yhcP/WJl kM1bP7ROVLjgkZ8X1ulqGWpVPN09mtS2fYMPFpNtIC56WIWPui5IPEUOknwiqQDG2Q9+XZzp2Pl8gK8qhywPQ9SfNiw== 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: dma fence can be used at various points in the code and it's very hard to distinguish dma fences between different usages. Using a single dept_key for all the dma fences could trigger false positive reports. Assign unique dept_key to each distinct dma fence wait to avoid false positive reports. Signed-off-by: Byungchul Park --- drivers/dma-buf/dma-fence.c | 18 ++++----- include/linux/dma-fence.h | 74 +++++++++++++++++++++++++++++-------- 2 files changed, 68 insertions(+), 24 deletions(-) diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c index 0a4b519e3351..df52a7ae336a 100644 --- a/drivers/dma-buf/dma-fence.c +++ b/drivers/dma-buf/dma-fence.c @@ -481,7 +481,7 @@ int dma_fence_signal(struct dma_fence *fence) EXPORT_SYMBOL(dma_fence_signal); /** - * dma_fence_wait_timeout - sleep until the fence gets signaled + * __dma_fence_wait_timeout - sleep until the fence gets signaled * or until timeout elapses * @fence: the fence to wait on * @intr: if true, do an interruptible wait @@ -499,7 +499,7 @@ EXPORT_SYMBOL(dma_fence_signal); * See also dma_fence_wait() and dma_fence_wait_any_timeout(). */ signed long -dma_fence_wait_timeout(struct dma_fence *fence, bool intr, signed long timeout) +__dma_fence_wait_timeout(struct dma_fence *fence, bool intr, signed long timeout) { signed long ret; @@ -528,7 +528,7 @@ dma_fence_wait_timeout(struct dma_fence *fence, bool intr, signed long timeout) } return ret; } -EXPORT_SYMBOL(dma_fence_wait_timeout); +EXPORT_SYMBOL(__dma_fence_wait_timeout); /** * dma_fence_release - default release function for fences @@ -764,7 +764,7 @@ dma_fence_default_wait_cb(struct dma_fence *fence, struct dma_fence_cb *cb) } /** - * dma_fence_default_wait - default sleep until the fence gets signaled + * __dma_fence_default_wait - default sleep until the fence gets signaled * or until timeout elapses * @fence: the fence to wait on * @intr: if true, do an interruptible wait @@ -776,7 +776,7 @@ dma_fence_default_wait_cb(struct dma_fence *fence, struct dma_fence_cb *cb) * functions taking a jiffies timeout. */ signed long -dma_fence_default_wait(struct dma_fence *fence, bool intr, signed long timeout) +__dma_fence_default_wait(struct dma_fence *fence, bool intr, signed long timeout) { struct default_wait_cb cb; unsigned long flags; @@ -825,7 +825,7 @@ dma_fence_default_wait(struct dma_fence *fence, bool intr, signed long timeout) spin_unlock_irqrestore(fence->lock, flags); return ret; } -EXPORT_SYMBOL(dma_fence_default_wait); +EXPORT_SYMBOL(__dma_fence_default_wait); static bool dma_fence_test_signaled_any(struct dma_fence **fences, uint32_t count, @@ -845,7 +845,7 @@ dma_fence_test_signaled_any(struct dma_fence **fences, uint32_t count, } /** - * dma_fence_wait_any_timeout - sleep until any fence gets signaled + * __dma_fence_wait_any_timeout - sleep until any fence gets signaled * or until timeout elapses * @fences: array of fences to wait on * @count: number of fences to wait on @@ -865,7 +865,7 @@ dma_fence_test_signaled_any(struct dma_fence **fences, uint32_t count, * See also dma_fence_wait() and dma_fence_wait_timeout(). */ signed long -dma_fence_wait_any_timeout(struct dma_fence **fences, uint32_t count, +__dma_fence_wait_any_timeout(struct dma_fence **fences, uint32_t count, bool intr, signed long timeout, uint32_t *idx) { struct default_wait_cb *cb; @@ -933,7 +933,7 @@ dma_fence_wait_any_timeout(struct dma_fence **fences, uint32_t count, return ret; } -EXPORT_SYMBOL(dma_fence_wait_any_timeout); +EXPORT_SYMBOL(__dma_fence_wait_any_timeout); /** * DOC: deadline hints diff --git a/include/linux/dma-fence.h b/include/linux/dma-fence.h index 64639e104110..1062fbb637e5 100644 --- a/include/linux/dma-fence.h +++ b/include/linux/dma-fence.h @@ -369,8 +369,22 @@ int dma_fence_signal_locked(struct dma_fence *fence); int dma_fence_signal_timestamp(struct dma_fence *fence, ktime_t timestamp); int dma_fence_signal_timestamp_locked(struct dma_fence *fence, ktime_t timestamp); -signed long dma_fence_default_wait(struct dma_fence *fence, +signed long __dma_fence_default_wait(struct dma_fence *fence, bool intr, signed long timeout); + +/* + * Associate every caller with its own dept map. + */ +#define dma_fence_default_wait(f, intr, t) \ +({ \ + signed long __ret; \ + \ + sdt_might_sleep_start_timeout(NULL, t); \ + __ret = __dma_fence_default_wait(f, intr, t); \ + sdt_might_sleep_end(); \ + __ret; \ +}) + int dma_fence_add_callback(struct dma_fence *fence, struct dma_fence_cb *cb, dma_fence_func_t func); @@ -607,12 +621,37 @@ static inline ktime_t dma_fence_timestamp(struct dma_fence *fence) return fence->timestamp; } -signed long dma_fence_wait_timeout(struct dma_fence *, +signed long __dma_fence_wait_timeout(struct dma_fence *, bool intr, signed long timeout); -signed long dma_fence_wait_any_timeout(struct dma_fence **fences, +signed long __dma_fence_wait_any_timeout(struct dma_fence **fences, uint32_t count, bool intr, signed long timeout, uint32_t *idx); +/* + * Associate every caller with its own dept map. + */ +#define dma_fence_wait_timeout(f, intr, t) \ +({ \ + signed long __ret; \ + \ + sdt_might_sleep_start_timeout(NULL, t); \ + __ret = __dma_fence_wait_timeout(f, intr, t); \ + sdt_might_sleep_end(); \ + __ret; \ +}) + +/* + * Associate every caller with its own dept map. + */ +#define dma_fence_wait_any_timeout(fpp, count, intr, t, idx) \ +({ \ + signed long __ret; \ + \ + sdt_might_sleep_start_timeout(NULL, t); \ + __ret = __dma_fence_wait_any_timeout(fpp, count, intr, t, idx); \ + sdt_might_sleep_end(); \ + __ret; \ +}) /** * dma_fence_wait - sleep until the fence gets signaled @@ -628,19 +667,24 @@ signed long dma_fence_wait_any_timeout(struct dma_fence **fences, * fence might be freed before return, resulting in undefined behavior. * * See also dma_fence_wait_timeout() and dma_fence_wait_any_timeout(). + * + * Associate every caller with its own dept map. */ -static inline signed long dma_fence_wait(struct dma_fence *fence, bool intr) -{ - signed long ret; - - /* Since dma_fence_wait_timeout cannot timeout with - * MAX_SCHEDULE_TIMEOUT, only valid return values are - * -ERESTARTSYS and MAX_SCHEDULE_TIMEOUT. - */ - ret = dma_fence_wait_timeout(fence, intr, MAX_SCHEDULE_TIMEOUT); - - return ret < 0 ? ret : 0; -} +#define dma_fence_wait(f, intr) \ +({ \ + signed long __ret; \ + \ + sdt_might_sleep_start_timeout(NULL, MAX_SCHEDULE_TIMEOUT); \ + __ret = __dma_fence_wait_timeout(f, intr, MAX_SCHEDULE_TIMEOUT);\ + sdt_might_sleep_end(); \ + \ + /* \ + * Since dma_fence_wait_timeout cannot timeout with \ + * MAX_SCHEDULE_TIMEOUT, only valid return values are \ + * -ERESTARTSYS and MAX_SCHEDULE_TIMEOUT. \ + */ \ + __ret < 0 ? __ret : 0; \ +}) void dma_fence_set_deadline(struct dma_fence *fence, ktime_t deadline); -- 2.17.1