Messages in this thread | | | Date | Thu, 8 Mar 2007 11:02:21 -0500 (EST) | From | Alan Stern <> | Subject | Re: refcounting drivers' data structures used in sysfs buffers |
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On Thu, 8 Mar 2007, Oliver Neukum wrote:
> Hi, > > after a lightning bolt from high above I've been looking into refcounting > the data structures drivers use to provide the data used to refill sysfs > buffers. I've come to the following conclusion. > > 1. struct sysfs_buffer must have a struct kref * and probably a destructor > pointer > 2. drivers must be able to pass these pointers through an extended > device_create_file() > 3. Drivers must use refcounting if they want to use attributes > 4. read/write/poll must do refcounting > > I am not sure where to store the pointers. struct sysfs_dirent() looks > like the obvious choice. Comments?
Can you explain the reasoning that led to these conclusions? And what exactly was your lightning bolt?
Alan Stern
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