Re: [PATCH v5 6/6] docs: ABI: Add sysfs documentation interface of dw-xdata-pcie driver

[Greg Kroah-Hartman]

On Thu, Feb 11, 2021 at 11:29:14AM +0200, Leon Romanovsky wrote:
> On Thu, Feb 11, 2021 at 10:08:43AM +0100, Gustavo Pimentel wrote:
> > This patch describes the sysfs interface implemented on the dw-xdata-pcie
> > driver.
> >
> > Signed-off-by: Gustavo Pimentel <gustavo.pimentel@xxxxxxxxxxxx>
> > ---
> >  Documentation/ABI/testing/sysfs-driver-xdata | 46 ++++++++++++++++++++++++++++
> >  1 file changed, 46 insertions(+)
> >  create mode 100644 Documentation/ABI/testing/sysfs-driver-xdata
> 
> I don't know and maybe this is how modern drivers are developed now, but my
> laptop doesn't have anything driver and vendor specific related under plain
> /sys/kernel/* directory.
> 
> ➜  kernel git:(rdma-next) ls -l /sys/kernel
> total 0
> drwxr-xr-x.   2 root root    0 Feb 11 11:20 boot_params
> drwxr-xr-x.   2 root root    0 Feb 11 11:20 btf
> drwxr-xr-x.   2 root root    0 Feb 11 11:20 cgroup
> drwxr-xr-x.   2 root root    0 Feb  8 07:45 config
> drwx------.  51 root root    0 Feb  8 07:45 debug
> -r--r--r--.   1 root root 4096 Feb 11 11:20 fscaps
> drwxr-xr-x.   2 root root    0 Feb  8 10:16 iommu_groups
> drwxr-xr-x.  94 root root    0 Feb 11 11:20 irq
> -r--r--r--.   1 root root 4096 Feb 11 11:20 kexec_crash_loaded
> -rw-r--r--.   1 root root 4096 Feb 11 11:20 kexec_crash_size
> -r--r--r--.   1 root root 4096 Feb 11 11:20 kexec_loaded
> drwxr-xr-x.   2 root root    0 Feb 11 11:20 livepatch
> drwxr-xr-x.   6 root root    0 Feb  8 07:45 mm
> -r--r--r--.   1 root root  512 Feb 11 11:20 notes
> -rw-r--r--.   1 root root 4096 Feb 11 11:20 profiling
> -rw-r--r--.   1 root root 4096 Feb 11 11:20 rcu_expedited
> -rw-r--r--.   1 root root 4096 Feb 11 11:20 rcu_normal
> drwxr-xr-x.   4 root root    0 Feb  8 07:45 security
> drwxr-xr-x. 163 root root    0 Feb 11 11:20 slab
> drwxr-xr-x.   4 root root    0 Feb 11 11:20 software_nodes
> drwx------.   8 root root    0 Feb  8 07:45 tracing
> -r--r--r--.   1 root root 4096 Feb 11 11:20 uevent_seqnum
> -r--r--r--.   1 root root 4096 Feb 11 11:20 vmcoreinfo
> 
> Also it is very uncommon in large subsystems to see custom sysfs entries
> for the specific driver. I wonder why this dw-xdata-pcie driver is different.

It is not, and should not do that at all.