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Jens Axboe b874d4aae5 block: limit block time caching to in_task() context
We should not have any callers of this from non-task context, but Jakub
ran [1] into one from blk-iocost. Rather than risk running into others,
or future ones, just limit blk_time_get_ns() to when it is called from
a task. Any other usage is invalid.

[1] https://lore.kernel.org/lkml/CAHk-=wiOaBLqarS2uFhM1YdwOvCX4CZaWkeyNDY1zONpbYw2ig@mail.gmail.com/

Fixes: da4c8c3d09 ("block: cache current nsec time in struct blk_plug")
Reported-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2024-03-13 14:12:53 -06:00
arch Thermal control updates for 6.9-rc1 2024-03-13 12:03:57 -07:00
block block: limit block time caching to in_task() context 2024-03-13 14:12:53 -06:00
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