x86/mm: Fix function name typo in pmd_read_atomic() comment

The function involved should be pte_offset_map_lock() and we never have
function pmd_offset_map_lock defined.

Signed-off-by: Wei Yang <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
[ Minor edits. ]
Signed-off-by: Ingo Molnar <[email protected]>

Author: Wei Yang

arch/x86/include/asm/pgtable-3level.h

@@ -44,10 +44,10 @@ static inline void native_set_pte(pte_t *ptep, pte_t pte)
  * pmd_populate rightfully does a set_64bit, but if we're reading the
  * pmd_t with a "*pmdp" on the mincore side, a SMP race can happen
  * because gcc will not read the 64bit of the pmd atomically. To fix
- * this all places running pmd_offset_map_lock() while holding the
+ * this all places running pte_offset_map_lock() while holding the
  * mmap_sem in read mode, shall read the pmdp pointer using this
  * function to know if the pmd is null nor not, and in turn to know if
- * they can run pmd_offset_map_lock or pmd_trans_huge or other pmd
+ * they can run pte_offset_map_lock() or pmd_trans_huge() or other pmd
  * operations.
  *
  * Without THP if the mmap_sem is hold for reading, the pmd can only