Hi sakthi, On Wed, Mar 23, 2011 at 10:08 PM, sakthi selvam <sakthi.cdm@xxxxxxxxx> wrote: > Dear All, > > Need your assistance: > > Currently I am using Wind River Linux distribution OS with kernel > version 2.6.27.39 and Wind River version pne-3. After loading of my > kernel module, I found it was permanent in the kernel using lsmod (for > ex see below Ref 1). When I tried to remove, it was displaying as > “ERROR: Removing 'hsl_module': Device or resource busy”. For your > information, the same module is working fine with the Wind River pne-2 > Linux Distribution OS with kernel version 2.6.21. > >From the kernel source, I came to know that only possibility of > showing permanent is “if there is non-availability of cleanup_module > and with the availability of init_module”. > > But in my case, cleanup module also available in memory, after loading > the module. I used to check using the file in /proc/kallsyms for the > availability of cleanup module in memory. > > Thanks for reading. Prompt reply is expected to identify the root cause. > > Ref 1: > Module Size Used by > hsl_module 530454 0 [permanent] Modules show up as permanent when they don't have a module_exit procedure declared. Since no module_exit was provided, they can't be unloaded. -- Dave Hylands Shuswap, BC, Canada http://www.davehylands.com _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
