✗ CI.checkpatch: warning for drm/xe: make CTX_TIME STAMP TOCTOU-safe and handle sentinels

== Series Details ==

Series: drm/xe: make CTX_TIMESTAMP TOCTOU-safe and handle sentinels
URL   : https://patchwork.freedesktop.org/series/171909/
State : warning

== Summary ==

+ KERNEL=/kernel
+ git clone https://gitlab.freedesktop.org/drm/maintainer-tools mt
Cloning into 'mt'...
warning: redirecting to https://gitlab.freedesktop.org/drm/maintainer-tools.git/
+ git -C mt rev-list -n1 origin/master
061140b9bc586ae7f40abc1249c97e1cc72d1b9d
+ cd /kernel
+ git config --global --add safe.directory /kernel
+ git log -n1
commit 2cfa5cbe637bd134f760adc9e9e4250ab1b1550e
Author: Gajendra Uttamchand <[email protected]>
Date:   Mon Aug 10 07:18:14 2026 +0000

    drm/xe/lrc: document sentinel and make CTX_TIMESTAMP read TOCTOU-safe
    
    Problem: CTX_TIMESTAMP MMIO reads could be stale if a context
    switched out between check and read; LRC stores a sentinel while
    a context starts that must not be treated as a real timestamp.
    
    Fix: Check the LRC-stored sentinel before and after the MMIO read;
    return the LRC value if the context switched out to avoid TOCTOU.
    
    Fixes: d243ef6a39c6 ("drm/xe/lrc: Refactor xe_lrc_timestamp to simplify
    logic")
    Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/work_items/7956
    
    Note: Keep XE_LRC_CTX_TIMESTAMP_ACTIVE in xe_lrc.h as the
    canonical sentinel.
    
    Assisted-by: GitHub-Copilot:claude-sonnet-5
    Signed-off-by: Gajendra Uttamchand <[email protected]>
    Reviewed-by: Umesh Nerlige Ramappa <[email protected]>
    Acked-by: Matthew Brost <[email protected]>
+ /mt/dim checkpatch 9c14709d79cf144f0990551a124af7615bdd97be drm-intel
2cfa5cbe637b drm/xe/lrc: document sentinel and make CTX_TIMESTAMP read TOCTOU-safe
-:14: WARNING:BAD_FIXES_TAG: Please use correct Fixes: style 'Fixes: <12+ chars of sha1> ("<title line>")' - ie: 'Fixes: d243ef6a39c6 ("drm/xe/lrc: Refactor xe_lrc_timestamp to simplify logic")'
#14: 
Fixes: d243ef6a39c6 ("drm/xe/lrc: Refactor xe_lrc_timestamp to simplify

total: 0 errors, 1 warnings, 0 checks, 55 lines checked