+ mm-pgtable-define-pte_index-so-that-preprocessor-could-recognize-it.patch added to -mm tree

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The patch titled
     Subject: mm/pgtable: define pte_index so that preprocessor could recognize it
has been added to the -mm tree.  Its filename is
     mm-pgtable-define-pte_index-so-that-preprocessor-could-recognize-it.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-pgtable-define-pte_index-so-that-preprocessor-could-recognize-it.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-pgtable-define-pte_index-so-that-preprocessor-could-recognize-it.patch

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------------------------------------------------------
From: Mike Rapoport <rppt@xxxxxxxxxxxxx>
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/20220111145457.20748-1-rppt@xxxxxxxxxx
Fixes: 974b9b2c68f3 ("mm: consolidate pte_index() and pte_offset_*() definitions")
Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Reported-by: Christian Dietrich <stettberger@xxxxxxxxxxx>
Reviewed-by: Khalid Aziz <khalid.aziz@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

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

--- 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)
_

Patches currently in -mm which might be from rppt@xxxxxxxxxxxxx are

mm-pgtable-define-pte_index-so-that-preprocessor-could-recognize-it.patch




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