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SubjectRe: [PATCH v2 2/2] elevator: acquire q->sysfs_lock in elevator_change()
On Fri, Aug 30, 2013 at 06:47:16PM -0400, Tomoki Sekiyama wrote:
> Add locking of q->sysfs_lock into elevator_change() (an exported function)
> to ensure it is held to protect q->elevator from elevator_init(), even if
> elevator_change() is called from non-sysfs paths.
> sysfs path (elv_iosched_store) uses __elevator_change(), non-locking
> version, as the lock is already taken by elv_iosched_store().
> Signed-off-by: Tomoki Sekiyama <>

Acked-by: Tejun Heo <>



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