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| author | Doug Berger <[email protected]> | 2019-07-01 17:50:11 +0000 |
|---|---|---|
| committer | Russell King <[email protected]> | 2019-08-23 10:32:36 +0000 |
| commit | c51bc12d06b3a5494fbfcbd788a8e307932a06e9 (patch) | |
| tree | 1be152722286130b0930674e5110f9492d088b6b /tools/perf/scripts/python/net_dropmonitor.py | |
| parent | Linux 5.3-rc5 (diff) | |
| download | kernel-c51bc12d06b3a5494fbfcbd788a8e307932a06e9.tar.gz kernel-c51bc12d06b3a5494fbfcbd788a8e307932a06e9.zip | |
ARM: 8874/1: mm: only adjust sections of valid mm structures
A timing hazard exists when an early fork/exec thread begins
exiting and sets its mm pointer to NULL while a separate core
tries to update the section information.
This commit ensures that the mm pointer is not NULL before
setting its section parameters. The arguments provided by
commit 11ce4b33aedc ("ARM: 8672/1: mm: remove tasklist locking
from update_sections_early()") are equally valid for not
requiring grabbing the task_lock around this check.
Fixes: 08925c2f124f ("ARM: 8464/1: Update all mm structures with section adjustments")
Signed-off-by: Doug Berger <[email protected]>
Acked-by: Laura Abbott <[email protected]>
Cc: Mike Rapoport <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Florian Fainelli <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: "Steven Rostedt (VMware)" <[email protected]>
Cc: Peng Fan <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Signed-off-by: Russell King <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/net_dropmonitor.py')
0 files changed, 0 insertions, 0 deletions