[V3,35/37] drm/nouveau/device: Replace io_mapping_map_atomic_wc()
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Message ID 20201103095900.158813457@linutronix.de
State New, archived
Headers show
Series
  • mm/highmem: Preemptible variant of kmap_atomic & friends
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Commit Message

Thomas Gleixner Nov. 3, 2020, 9:27 a.m. UTC
Neither fbmem_peek() nor fbmem_poke() require to disable pagefaults and
preemption as a side effect of io_mapping_map_atomic_wc().

Use io_mapping_map_local_wc() instead.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: dri-devel@lists.freedesktop.org
Cc: nouveau@lists.freedesktop.org
---
V3: New patch
---
 drivers/gpu/drm/nouveau/nvkm/subdev/devinit/fbmem.h |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

Patch
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--- a/drivers/gpu/drm/nouveau/nvkm/subdev/devinit/fbmem.h
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/devinit/fbmem.h
@@ -60,19 +60,19 @@  fbmem_fini(struct io_mapping *fb)
 static inline u32
 fbmem_peek(struct io_mapping *fb, u32 off)
 {
-	u8 __iomem *p = io_mapping_map_atomic_wc(fb, off & PAGE_MASK);
+	u8 __iomem *p = io_mapping_map_local_wc(fb, off & PAGE_MASK);
 	u32 val = ioread32(p + (off & ~PAGE_MASK));
-	io_mapping_unmap_atomic(p);
+	io_mapping_unmap_local(p);
 	return val;
 }
 
 static inline void
 fbmem_poke(struct io_mapping *fb, u32 off, u32 val)
 {
-	u8 __iomem *p = io_mapping_map_atomic_wc(fb, off & PAGE_MASK);
+	u8 __iomem *p = io_mapping_map_local_wc(fb, off & PAGE_MASK);
 	iowrite32(val, p + (off & ~PAGE_MASK));
 	wmb();
-	io_mapping_unmap_atomic(p);
+	io_mapping_unmap_local(p);
 }
 
 static inline bool