how to determine if buffers are in user-space/kernel-space

Hi,

We have an out-of-tree kernel module which was using
segment_eq(get_fs(), KERNEL_DS) to determine whether buffers are in
Kernel space vs User space. However, with the get_fs() and its friends
removed[1], we are out of ideas on how to determine if buffers are in
user space or kernel space. Can someone shed some light on how to
accomplish it?


Thanks in Advance,
Raju

[1]
https://patchwork.kernel.org/project/linux-fsdevel/patch/20200817073212.830069-10-hch@lst.de/

On Mon, 18 Jan 2021 23:56:37 +0530
Raju Rangoju [off-list ref] wrote:

Hi,

We have an out-of-tree kernel module which was using
segment_eq(get_fs(), KERNEL_DS) to determine whether buffers are in
Kernel space vs User space. However, with the get_fs() and its friends
removed[1], we are out of ideas on how to determine if buffers are in
user space or kernel space. Can someone shed some light on how to
accomplish it?

Sorry, you are asking in the wrong place. Supporting any out of
tree modules is completely your own problem to deal with.