The patch titled
Subject: mm: bring sparc pte_index() semantics inline with other platforms
has been added to the -mm tree. Its filename is
mm-bring-sparc-pte_index-semantics-inline-with-other-platforms.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-bring-sparc-pte_index-semantics-inline-with-other-platforms.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-bring-sparc-pte_index-semantics-inline-with-other-platforms.patch
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------------------------------------------------------
From: Arjun Roy <arjunroy@xxxxxxxxxx>
Subject: mm: bring sparc pte_index() semantics inline with other platforms
pte_index() on platforms other than sparc return a numerical index. On
sparc, it returns a pte_t*. This presents an issue for vm_insert_pages(),
which relies on pte_index() to find the offset for a pte within a pmd, for
batched inserts.
This patch:
1. Modifies pte_index() for sparc to return a numerical index, like
other platforms,
2. Defines pte_entry() for sparc which returns a pte_t*
(as pte_index() used to),
3. Converts existing sparc callers for pte_index() to use pte_entry().
[sfr@xxxxxxxxxxxxxxxx: remove pte_entry and just directly modified pte_offset_kernel instead]
Link: http://lkml.kernel.org/r/20200227105045.6b421d9f@xxxxxxxxxxxxxxxx
Signed-off-by: Arjun Roy <arjunroy@xxxxxxxxxx>
Signed-off-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Cc: Eric Dumazet <edumazet@xxxxxxxxxx>
Cc: Soheil Hassas Yeganeh <soheil@xxxxxxxxxx>
Cc: David Miller <davem@xxxxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/sparc/include/asm/pgtable_64.h | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
--- a/arch/sparc/include/asm/pgtable_64.h~mm-bring-sparc-pte_index-semantics-inline-with-other-platforms
+++ a/arch/sparc/include/asm/pgtable_64.h
@@ -907,11 +907,11 @@ static inline unsigned long pud_pfn(pud_
(((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)))
/* Find an entry in the third-level page table.. */
-#define pte_index(dir, address) \
- ((pte_t *) __pmd_page(*(dir)) + \
- ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
-#define pte_offset_kernel pte_index
-#define pte_offset_map pte_index
+#define pte_index(address) \
+ ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
+#define pte_offset_kernel(dir, address) \
+ ((pte_t *) __pmd_page(*(dir)) + pte_index(address))
+#define pte_offset_map(dir, address) pte_offset_kernel((dir), (address))
#define pte_unmap(pte) do { } while (0)
/* We cannot include <linux/mm_types.h> at this point yet: */
_
Patches currently in -mm which might be from arjunroy@xxxxxxxxxx are
mm-refactor-insert_page-to-prepare-for-batched-lock-insert.patch
mm-bring-sparc-pte_index-semantics-inline-with-other-platforms.patch
mm-add-vm_insert_pages.patch
mm-add-vm_insert_pages-2.patch
net-zerocopy-use-vm_insert_pages-for-tcp-rcv-zerocopy.patch
