| From 314c459a6fe0957b5885fbc65c53d51444092880 Mon Sep 17 00:00:00 2001 |
| From: Mike Rapoport <rppt@linux.ibm.com> |
| Date: Thu, 3 Feb 2022 20:49:29 -0800 |
| Subject: mm/pgtable: define pte_index so that preprocessor could recognize it |
| |
| From: Mike Rapoport <rppt@linux.ibm.com> |
| |
| commit 314c459a6fe0957b5885fbc65c53d51444092880 upstream. |
| |
| 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> |
| Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| --- |
| include/linux/pgtable.h | 1 + |
| 1 file changed, 1 insertion(+) |
| |
| --- a/include/linux/pgtable.h |
| +++ b/include/linux/pgtable.h |
| @@ -44,6 +44,7 @@ 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) |
