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authorPeter Collingbourne <pcc@google.com>2022-11-04 04:10:37 +0300
committerMarc Zyngier <maz@kernel.org>2022-11-29 12:26:07 +0300
commitef6458b1b6ca3fdb991ce4182e981a88d4c58c0f (patch)
treed52ed45ee1bde6bbe472830fb429d3917d6bb20e /include/linux/kernel-page-flags.h
parent2dbf12ae132cc78048615cfa19c9be64baaf0ced (diff)
downloadlinux-ef6458b1b6ca3fdb991ce4182e981a88d4c58c0f.tar.xz
mm: Add PG_arch_3 page flag
As with PG_arch_2, this flag is only allowed on 64-bit architectures due to the shortage of bits available. It will be used by the arm64 MTE code in subsequent patches. Signed-off-by: Peter Collingbourne <pcc@google.com> Cc: Will Deacon <will@kernel.org> Cc: Marc Zyngier <maz@kernel.org> Cc: Steven Price <steven.price@arm.com> [catalin.marinas@arm.com: added flag preserving in __split_huge_page_tail()] Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Reviewed-by: Steven Price <steven.price@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20221104011041.290951-5-pcc@google.com
Diffstat (limited to 'include/linux/kernel-page-flags.h')
-rw-r--r--include/linux/kernel-page-flags.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/kernel-page-flags.h b/include/linux/kernel-page-flags.h
index eee1877a354e..859f4b0c1b2b 100644
--- a/include/linux/kernel-page-flags.h
+++ b/include/linux/kernel-page-flags.h
@@ -18,5 +18,6 @@
#define KPF_UNCACHED 39
#define KPF_SOFTDIRTY 40
#define KPF_ARCH_2 41
+#define KPF_ARCH_3 42
#endif /* LINUX_KERNEL_PAGE_FLAGS_H */