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workqueue: implement current_is_async()

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This function queries whether %current is an async worker executing an
async item.  This will be used to implement warning on synchronous
request_module() from async workers.

Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Tejun Heo 2013-01-18 14:05:56 -08:00
parent 2eaebdb33e
commit 84b233adcc
3 changed files with 26 additions and 0 deletions
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include/linux/async.h
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@ -52,4 +52,5 @@ extern void async_synchronize_full_domain(struct async_domain *domain);
extern void async_synchronize_cookie(async_cookie_t cookie);
extern void async_synchronize_cookie_domain(async_cookie_t cookie,
struct async_domain *domain);
extern bool current_is_async(void);
#endif