On Tue, May 23, 2017 at 2:53 PM, Greg KH <g...@kroah.com> wrote: > On Tue, May 23, 2017 at 12:58:07PM +0530, Madhu K wrote: > > Hi Greg, > > > > Thanks for your response. > > > > > > On Tue, May 23, 2017 at 12:04 PM, Greg KH <g...@kroah.com> wrote: > > > > On Tue, May 23, 2017 at 11:58:31AM +0530, Madhu K wrote: > > > Hi All, > > > > > > why there is no character device entry present in /sys/class? > where as > > block > > > and net device entries are present. > > > > I see character devices there, but not the device nodes. I don't see > > block device nodes there either. > > > > > > If I am wrong please correct me, there is a folder called block in > /sys/class. > > is block not containing block device nodes? > > Nope, look closer :) >
I checked the block folder, the entries which are present in /sys/class/block are softlink to /sys/devices nodes. what i understand from this is, all block net and char node entries are present in /sys/devices. Am i correct? > > > > Not only in /sys/class, for that matter why there is no character > device > > > entries present in /sys file system. > > > > What do you exactly mean by "character device entries"? > > > > > > like block and net why there is no char folder > > Again, look closer please. > > > > please help me to understand for what purpose char devices are > kept away > > from / > > > sys file system. > > > > Have you read the driver model chapter in the Linux Device drivers > book, > > or the in-kernel sysfs documentation? > > Again, please read all of the copious documentation that we have written > already about this topic. If after that, you still have questions, I > will be more than glad to help answer them. > > thanks, > > greg k-h >
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