[PATCH v2 3/3] gpu: nova-core: fb: two tiny readability cleanups

[John Hubbard]

The Blackwell sysmem flush read helper composed the 64-bit address as
lo | (hi << 32). Write it as (hi << 32) | lo, the order humans expect
to read, matching the bit layout and the new Hopper helper.

Also, to prevent some copy-paste boilerplate doc comments,
remove the second copy of "see [`crate::fb::SysmemFlush`]" from regs.rs.

Signed-off-by: John Hubbard <jhubbard@xxxxxxxxxx>
---
 drivers/gpu/nova-core/fb/hal/gb202.rs | 2 +-
 drivers/gpu/nova-core/regs.rs         | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/nova-core/fb/hal/gb202.rs b/drivers/gpu/nova-core/fb/hal/gb202.rs
index 6747ba6c9c13..b78e0970f66d 100644
--- a/drivers/gpu/nova-core/fb/hal/gb202.rs
+++ b/drivers/gpu/nova-core/fb/hal/gb202.rs
@@ -28,7 +28,7 @@ fn read_sysmem_flush_page_gb202(bar: Bar0<'_>) -> u64 {
             .adr(),
     );
 
-    lo | (hi << 32)
+    (hi << 32) | lo
 }
 
 /// Write the sysmem flush page address through the GB20x FBHUB0 registers.
diff --git a/drivers/gpu/nova-core/regs.rs b/drivers/gpu/nova-core/regs.rs
index 7982778fd6cb..3f16365d3a0e 100644
--- a/drivers/gpu/nova-core/regs.rs
+++ b/drivers/gpu/nova-core/regs.rs
@@ -126,7 +126,7 @@ fn fmt(&self, f: &mut kernel::fmt::Formatter<'_>) -> kernel::fmt::Result {
     }
 
     /// High bits of the physical system memory address used by the GPU to perform sysmembar
-    /// operations (see [`crate::fb::SysmemFlush`]).
+    /// operations.
     pub(crate) NV_PFB_NISO_FLUSH_SYSMEM_ADDR_HI(u32) @ 0x00100c40 {
         23:0    adr_63_40;
     }
-- 
2.54.0