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Christian König 0da611a870 dma-buf: add dma_fence_timestamp helper 
When a fence signals there is a very small race window where the timestamp
isn't updated yet. sync_file solves this by busy waiting for the
timestamp to appear, but on other ocassions didn't handled this
correctly.

Provide a dma_fence_timestamp() helper function for this and use it in
all appropriate cases.

Another alternative would be to grab the spinlock when that happens.

v2 by teddy: add a wait parameter to wait for the timestamp to show up, in case
   the accurate timestamp is needed and/or the timestamp is not based on
   ktime (e.g. hw timestamp)
v3 chk: drop the parameter again for unified handling

Signed-off-by: Yunxiang Li <Yunxiang.Li@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Fixes: 1774baa64f ("drm/scheduler: Change scheduled fence track v2")
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
CC: stable@vger.kernel.org
Link: https://patchwork.freedesktop.org/patch/msgid/20230929104725.2358-1-christian.koenig@amd.com
2023-10-31 22:24:10 -04:00
arch arm64: defconfig: Enable ILITEK_ILI9882T panel 2023-10-19 14:46:06 -07:00
block
certs
crypto
Documentation accel/qaic: Support MHI QAIC_TIMESYNC channel 2023-10-27 10:06:34 -06:00
drivers dma-buf: add dma_fence_timestamp helper 2023-10-31 22:24:10 -04:00
fs stat: remove no-longer-used helper macros 2023-09-17 10:46:12 -07:00
include dma-buf: add dma_fence_timestamp helper 2023-10-31 22:24:10 -04:00
init
io_uring io_uring/net: fix iter retargeting for selected buf 2023-09-14 10:12:55 -06:00
ipc
kernel Fix a performance regression on large SMT systems, an Intel SMT4 2023-09-17 11:10:23 -07:00
lib
LICENSES
mm vm: fix move_vma() memory accounting being off 2023-09-16 15:23:31 -07:00
net kcm: Fix error handling for SOCK_DGRAM in kcm_sendmsg(). 2023-09-14 10:43:51 +02:00
rust
samples
scripts Kbuild fixes for v6.6 2023-09-16 15:27:00 -07:00
security
sound
tools Fix a cold functions related false-positive objtool warning 2023-09-17 10:59:37 -07:00
usr
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MAINTAINERS MAINTAINERS: Update the GPU Scheduler email 2023-10-26 15:45:05 -04:00
Makefile Linux 6.6-rc2 2023-09-17 14:40:24 -07:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.