sparc/mm: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE on 64bit

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Let's support __HAVE_ARCH_PTE_SWP_EXCLUSIVE by stealing one bit from the
type.  Generic MM currently only uses 5 bits for the type
(MAX_SWAPFILES_SHIFT), so the stolen bit was effectively unused.

While at it, mask the type in __swp_entry().

Link: https://lkml.kernel.org/r/20230113171026.582290-23-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

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David Hildenbrand 2023-01-13 18:10:22 +01:00 • committed by Andrew Morton

parent e6b37d7f6f

commit adf8e329ff

1 changed files with 35 additions and 3 deletions

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arch/sparc/include/asm/pgtable_64.h

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