fs_struct refcounting: spinlock vs atomic

[Enrico Weigelt]

Hi folks,


in fork.c, a spinlock is held for fs_struct refcounting, while other
places - eg. switch_task_namespaces uses atomic_dec_and_test() on
the nsproxy.

What's the exact difference here ? Could the atomic counting also used
for fs_struct ?


--mtx

--
Enrico Weigelt, metux IT consult
Free software and Linux embedded engineering
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