linux

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David Hildenbrand 8897ebff37 powerpc/mm: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE on 32bit book3s

We already implemented support for 64bit book3s in commit bff9beaa2e80
("powerpc/pgtable: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE for book3s")

Let's support __HAVE_ARCH_PTE_SWP_EXCLUSIVE also in 32bit by reusing yet
unused LSB 2 / MSB 29.  There seems to be no real reason why that bit
cannot be used, and reusing it avoids having to steal one bit from the
swap offset.

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

Link: https://lkml.kernel.org/r/20230113171026.582290-18-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

2023-02-02 22:33:09 -08:00

boot

powerpc fixes for 6.2 #3

2023-01-15 07:09:41 -06:00

configs

USB/Thunderbolt driver changes for 6.2-rc1

2022-12-16 03:22:53 -08:00

crypto

treewide: use get_random_u32_below() instead of deprecated function

2022-11-18 02:15:15 +01:00

include

powerpc/mm: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE on 32bit book3s