media: staging: media: atomisp: Use kmap_local_page() in hmm_set()

The use of kmap() is being deprecated in favor of kmap_local_page()
where it is feasible. In file pci/hmm/hmm.c, function hmm_set() calls
kmap() / kunmap() where kmap_local_page() can instead do the mapping.

With kmap_local_page(), the mapping is per thread, CPU local and not
globally visible. Therefore, hmm_set()() is a function where the use
of kmap_local_page() in place of kmap() is correctly suited.

Convert the calls of kmap() / kunmap() to kmap_local_page() /
kunmap_local().

Link: https://lore.kernel.org/linux-media/20220413212210.18494-1-fmdefrancesco@gmail.com
Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

diff --git a/drivers/staging/media/atomisp/pci/hmm/hmm.c b/drivers/staging/media/atomisp/pci/hmm/hmm.c
index 74cc388a0eefc4b8bd3cc6788227a9293144aabc..2b015de56823dfbe517c6e20aa55b9be2e6c5a0d 100644 (file)
--- a/drivers/staging/media/atomisp/pci/hmm/hmm.c
+++ b/drivers/staging/media/atomisp/pci/hmm/hmm.c
@@ -508,7 +508,7 @@ int hmm_set(ia_css_ptr virt, int c, unsigned int bytes)
                idx = (virt - bo->start) >> PAGE_SHIFT;
                offset = (virt - bo->start) - (idx << PAGE_SHIFT);
 
-               des = (char *)kmap(bo->pages[idx]) + offset;
+               des = (char *)kmap_local_page(bo->pages[idx]) + offset;
 
                if ((bytes + offset) >= PAGE_SIZE) {
                        len = PAGE_SIZE - offset;
@@ -524,7 +524,7 @@ int hmm_set(ia_css_ptr virt, int c, unsigned int bytes)
 
                clflush_cache_range(des, len);
 
-               kunmap(bo->pages[idx]);
+               kunmap_local(des);
        }
 
        return 0;