diff options
| author | Mika Penttilä <mpenttil@redhat.com> | 2022-08-26 08:06:31 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-10-03 14:03:03 -0700 |
| commit | 6a760f58c792b6f7411f886271bb03f697464433 (patch) | |
| tree | ceeedb2153b30b27cf1b79c8ef501c025dec4e97 /tools/testing | |
| parent | dcc579663f607392ade99a2301278239e819f57e (diff) | |
| download | linux-6a760f58c792b6f7411f886271bb03f697464433.tar.gz linux-6a760f58c792b6f7411f886271bb03f697464433.tar.bz2 linux-6a760f58c792b6f7411f886271bb03f697464433.zip | |
mm/hmm/test: use char dev with struct device to get device node
HMM selftests use an in-kernel pseudo device to emulate device memory.
The pseudo device registers a major device range for two or four pseudo
device instances. User space has a script that reads /proc/devices in
order to find the assigned major number, and sends that to mknod(1), once
for each node.
Change this to properly use cdev and struct device APIs.
Delete the /proc/devices parsing from the user-space test script, now that
it is unnecessary.
Also, delete an unused field in struct dmirror_device: devmem.
Link: https://lkml.kernel.org/r/20220826050631.25771-1-mpenttil@redhat.com
Signed-off-by: Mika Penttilä <mpenttil@redhat.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'tools/testing')
| -rwxr-xr-x | tools/testing/selftests/vm/test_hmm.sh | 10 |
1 files changed, 0 insertions, 10 deletions
diff --git a/tools/testing/selftests/vm/test_hmm.sh b/tools/testing/selftests/vm/test_hmm.sh index 539c9371e592..46e19b5d648d 100755 --- a/tools/testing/selftests/vm/test_hmm.sh +++ b/tools/testing/selftests/vm/test_hmm.sh @@ -52,21 +52,11 @@ load_driver() usage fi fi - if [ $? == 0 ]; then - major=$(awk "\$2==\"HMM_DMIRROR\" {print \$1}" /proc/devices) - mknod /dev/hmm_dmirror0 c $major 0 - mknod /dev/hmm_dmirror1 c $major 1 - if [ $# -eq 2 ]; then - mknod /dev/hmm_dmirror2 c $major 2 - mknod /dev/hmm_dmirror3 c $major 3 - fi - fi } unload_driver() { modprobe -r $DRIVER > /dev/null 2>&1 - rm -f /dev/hmm_dmirror? } run_smoke() |