From: Mike Rapoport rppt@linux.ibm.com 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@kernel.org Fixes: 974b9b2c68f3 ("mm: consolidate pte_index() and pte_offset_*() definitions") Signed-off-by: Mike Rapoport rppt@linux.ibm.com Reported-by: Christian Dietrich stettberger@dokucode.de Reviewed-by: Khalid Aziz khalid.aziz@oracle.com Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

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) _