The quilt patch titled
Subject: nios2/mm: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE
has been removed from the -mm tree. Its filename was
nios2-mm-support-__have_arch_pte_swp_exclusive.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: David Hildenbrand <david@xxxxxxxxxx>
Subject: nios2/mm: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE
Date: Fri, 13 Jan 2023 18:10:14 +0100
Let's support __HAVE_ARCH_PTE_SWP_EXCLUSIVE by using the yet-unused bit
31.
Link: https://lkml.kernel.org/r/20230113171026.582290-15-david@xxxxxxxxxx
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/arch/nios2/include/asm/pgtable-bits.h~nios2-mm-support-__have_arch_pte_swp_exclusive
+++ a/arch/nios2/include/asm/pgtable-bits.h
@@ -31,4 +31,7 @@
#define _PAGE_ACCESSED (1<<26) /* page referenced */
#define _PAGE_DIRTY (1<<27) /* dirty page */
+/* We borrow bit 31 to store the exclusive marker in swap PTEs. */
+#define _PAGE_SWP_EXCLUSIVE (1<<31)
+
#endif /* _ASM_NIOS2_PGTABLE_BITS_H */
--- a/arch/nios2/include/asm/pgtable.h~nios2-mm-support-__have_arch_pte_swp_exclusive
+++ a/arch/nios2/include/asm/pgtable.h
@@ -239,7 +239,9 @@ static inline unsigned long pmd_page_vad
*
* 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1
* 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
- * 0 < type -> 0 0 0 0 0 0 <-------------- offset --------------->
+ * E < type -> 0 0 0 0 0 0 <-------------- offset --------------->
+ *
+ * E is the exclusive marker that is not stored in swap entries.
*
* Note that the offset field is always non-zero if the swap type is 0, thus
* !pte_none() is always true.
@@ -251,6 +253,24 @@ static inline unsigned long pmd_page_vad
#define __swp_entry_to_pte(swp) ((pte_t) { (swp).val })
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
+#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
+static inline int pte_swp_exclusive(pte_t pte)
+{
+ return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
+}
+
+static inline pte_t pte_swp_mkexclusive(pte_t pte)
+{
+ pte_val(pte) |= _PAGE_SWP_EXCLUSIVE;
+ return pte;
+}
+
+static inline pte_t pte_swp_clear_exclusive(pte_t pte)
+{
+ pte_val(pte) &= ~_PAGE_SWP_EXCLUSIVE;
+ return pte;
+}
+
extern void __init paging_init(void);
extern void __init mmu_init(void);
_
Patches currently in -mm which might be from david@xxxxxxxxxx are
