[PATCH] docs/mm: Physical Memory: Fix grammar

[Kim Phillips]

it's -> its
referenced to by -> referenced by

Fixes: 5d8c5e430a63 ("docs/mm: Physical Memory: add structure, introduction and nodes description")
Signed-off-by: Kim Phillips <kim.phillips@xxxxxxx>
---
 Documentation/mm/physical_memory.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/mm/physical_memory.rst b/Documentation/mm/physical_memory.rst
index 1bc888d36ea1..df2ed81e3639 100644
--- a/Documentation/mm/physical_memory.rst
+++ b/Documentation/mm/physical_memory.rst
@@ -19,7 +19,7 @@ a bank of memory very suitable for DMA near peripheral devices.
 
 Each bank is called a node and the concept is represented under Linux by a
 ``struct pglist_data`` even if the architecture is UMA. This structure is
-always referenced to by it's typedef ``pg_data_t``. ``A pg_data_t`` structure
+always referenced by its typedef ``pg_data_t``. A ``pg_data_t`` structure
 for a particular node can be referenced by ``NODE_DATA(nid)`` macro where
 ``nid`` is the ID of that node.
 
-- 
2.34.1