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| author | David Hildenbrand <david@redhat.com> | 2023-01-13 18:10:11 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-02-02 22:33:08 -0800 |
| commit | b5c88f21531c3457e3e202817556b68171484e00 (patch) | |
| tree | 462764478d84eff07f06c19216cda8f388e2079e /arch/m68k/apollo | |
| parent | ed4154067a086c44608b08f55cceb2688b661750 (diff) | |
| download | lwn-b5c88f21531c3457e3e202817556b68171484e00.tar.gz lwn-b5c88f21531c3457e3e202817556b68171484e00.zip | |
microblaze/mm: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE
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 is effectively unused.
The shift by 2 when converting between PTE and arch-specific swap entry
makes the swap PTE layout a little bit harder to decipher.
While at it, drop the comment from paulus---copy-and-paste leftover from
powerpc where we actually have _PAGE_HASHPTE---and mask the type in
__swp_entry_to_pte() as well.
Link: https://lkml.kernel.org/r/20230113171026.582290-12-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Cc: Michal Simek <monstr@monstr.eu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'arch/m68k/apollo')
0 files changed, 0 insertions, 0 deletions