[06/10] mm/pgtable: define pte_index so that preprocessor could recognize it

Commit Message

Andrew Morton Feb. 4, 2022, 5:57 p.m. UTC

From: Mike Rapoport <[e-mail]>
Subject: mm/pgtable: define pte_index so that preprocessor could recognize it

Since commit 974b9b2c68f3 ("mm: consolidate pte_index() and pte_offset_*()
definitions") pte_index is a static inline and there is no define for it
that can be recognized by the preprocessor.  As a result,
vm_insert_pages() uses slower loop over vm_insert_page() instead of
insert_pages() that amortizes the cost of spinlock operations when
inserting multiple pages.

Link: https://lkml.kernel.org/r/[e-mail]
Fixes: 974b9b2c68f3 ("mm: consolidate pte_index() and pte_offset_*() definitions")
Signed-off-by: Mike Rapoport <[e-mail]>
Reported-by: Christian Dietrich <[e-mail]>
Reviewed-by: Khalid Aziz <[e-mail]>
Cc: <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
---

 include/linux/pgtable.h |    1 +
 1 file changed, 1 insertion(+)

Patch

--- a/include/linux/pgtable.h~mm-pgtable-define-pte_index-so-that-preprocessor-could-recognize-it
+++ a/include/linux/pgtable.h
@@ -62,6 +62,7 @@  static inline unsigned long pte_index(un
 {
 	return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1);
 }
+#define pte_index pte_index
 
 #ifndef pmd_index
 static inline unsigned long pmd_index(unsigned long address)