> Out of curiosity, exactly where does open() call lock_kernel()? Although
> there are loads of places it gets called in fs/*.c, I didn't notice any on
> the path for open().
if (filp->f_op->open) {
lock_kernel();
ret = filp->f_op->open(inode,filp);
unlock_kernel();
}
from char_dev.c
Regards
Oliver
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