Greetings,
Does anybody know why sys_ioctl() calls lock_kernel() upon entry? I
didn't believe it so I did a test by adding a kernel_locked() check at
the beginning and end of the ioctl function of my driver. Sure enough,
the big kernel lock is held for the duration of the ioctl. If I wanted
to allow for the possibility of concurrent ioctl calls to my driver,
could I simply unlock_kernel at the beginning of the ioctl handler?
Thanks,
Kevin
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