diff options
| author | Xie Yongji <xieyongji@bytedance.com> | 2022-08-03 12:55:20 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2022-08-11 04:26:08 -0400 |
| commit | 82eb46f94ae5faa87ace248d950292c87384a097 (patch) | |
| tree | 59bc34926c52e9c16aba821a508226adf9715c7f /drivers | |
| parent | c32ee693125aa19a021dad32abbd49f5c6f70031 (diff) | |
| download | linux-82eb46f94ae5faa87ace248d950292c87384a097.tar.bz2 | |
vduse: Use memcpy_{to,from}_page() in do_bounce()
kmap_atomic() is being deprecated in favor of kmap_local_page().
The use of kmap_atomic() in do_bounce() is all thread local therefore
kmap_local_page() is a sufficient replacement.
Convert to kmap_local_page() but, instead of open coding it,
use the helpers memcpy_to_page() and memcpy_from_page().
Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Message-Id: <20220803045523.23851-3-xieyongji@bytedance.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/vdpa/vdpa_user/iova_domain.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/vdpa/vdpa_user/iova_domain.c b/drivers/vdpa/vdpa_user/iova_domain.c index bca1f0b8850c..50d7c08d5450 100644 --- a/drivers/vdpa/vdpa_user/iova_domain.c +++ b/drivers/vdpa/vdpa_user/iova_domain.c @@ -138,18 +138,17 @@ static void do_bounce(phys_addr_t orig, void *addr, size_t size, { unsigned long pfn = PFN_DOWN(orig); unsigned int offset = offset_in_page(orig); - char *buffer; + struct page *page; unsigned int sz = 0; while (size) { sz = min_t(size_t, PAGE_SIZE - offset, size); - buffer = kmap_atomic(pfn_to_page(pfn)); + page = pfn_to_page(pfn); if (dir == DMA_TO_DEVICE) - memcpy(addr, buffer + offset, sz); + memcpy_from_page(addr, page, offset, sz); else - memcpy(buffer + offset, addr, sz); - kunmap_atomic(buffer); + memcpy_to_page(page, offset, addr, sz); size -= sz; pfn++; |