From 35538d7822e86cb38015c21bb708a433f8814af0 Mon Sep 17 00:00:00 2001 From: Gustavo Padovan Date: Thu, 11 Aug 2016 12:26:44 -0300 Subject: dma-buf/sw_sync: de-stage SW_SYNC SW_SYNC allows to run tests on the sync_file framework via debugfs on /sync/sw_sync Opening and closing the file triggers creation and release of a sync timeline. To create fences on this timeline the SW_SYNC_IOC_CREATE_FENCE ioctl should be used. To increment the timeline value use SW_SYNC_IOC_INC. Also it exports Sync information on /sync/info Signed-off-by: Gustavo Padovan Reviewed-by: Eric Engestrom Signed-off-by: Greg Kroah-Hartman --- drivers/dma-buf/Kconfig | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'drivers/dma-buf/Kconfig') diff --git a/drivers/dma-buf/Kconfig b/drivers/dma-buf/Kconfig index 25bcfa0b474f..2585821b24ab 100644 --- a/drivers/dma-buf/Kconfig +++ b/drivers/dma-buf/Kconfig @@ -17,4 +17,17 @@ config SYNC_FILE Files fds, to the DRM driver for example. More details at Documentation/sync_file.txt. +config SW_SYNC + bool "Sync File Validation Framework" + default n + depends on SYNC_FILE + depends on DEBUG_FS + ---help--- + A sync object driver that uses a 32bit counter to coordinate + synchronization. Useful when there is no hardware primitive backing + the synchronization. + + WARNING: improper use of this can result in deadlocking kernel + drivers from userspace. Intended for test and debug only. + endmenu -- cgit v1.2.3