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Subject[RESEND PATCH 2/3] staging: media: atomisp: Use kmap_local_page() in hmm_set()
Date
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().

Tested-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
---
drivers/staging/media/atomisp/pci/hmm/hmm.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/media/atomisp/pci/hmm/hmm.c b/drivers/staging/media/atomisp/pci/hmm/hmm.c
index 6394385b6637..46ac082cd3f1 100644
--- a/drivers/staging/media/atomisp/pci/hmm/hmm.c
+++ b/drivers/staging/media/atomisp/pci/hmm/hmm.c
@@ -563,7 +563,7 @@ 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->page_obj[idx].page) + offset;
+ des = (char *)kmap_local_page(bo->page_obj[idx].page) + offset;

if ((bytes + offset) >= PAGE_SIZE) {
len = PAGE_SIZE - offset;
@@ -579,7 +579,7 @@ int hmm_set(ia_css_ptr virt, int c, unsigned int bytes)

clflush_cache_range(des, len);

- kunmap(bo->page_obj[idx].page);
+ kunmap_local(des);
}

return 0;
--
2.36.1
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