Messages in this thread |  | | Date | Wed, 10 Oct 2001 15:53:27 +0530 | From | "BALBIR SINGH" <> | Subject | [RFC] register_blkdev and unregister_blkdev |
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I was looking at the code for register_blkdev and unregister_blkdev. I found that no locking (spinlocks) are used to protect the blkdevs struture in these functions. I suspect we have not seen a problem till now since
Either
1. register_blkdev is called from modules, and only module initialization is protected. 2. register_blkdev is called during init time for drivers in the kernel and I am not sure about whether calls to register_blkdev at this time are implicitly serialized, since only 1 CPU is active during initialization
Anway, what I needed to know was if (1) and (2) are enough to ensure safety in register_blkdev and unregister_blkdev.
May be I am missing something, there is already some lock which is held before these routines are invoked, I could not find any.
Comments
Thanks, Balbir Singh.
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