• Steven Price's avatar
    mm: Add PG_arch_2 page flag · 4beba948
    Steven Price authored
    For arm64 MTE support it is necessary to be able to mark pages that
    contain user space visible tags that will need to be saved/restored e.g.
    when swapped out.
    
    To support this add a new arch specific flag (PG_arch_2). This flag is
    only available on 64-bit architectures due to the limited number of
    spare page flags on the 32-bit ones.
    Signed-off-by: default avatarSteven Price <steven.price@arm.com>
    [catalin.marinas@arm.com: use CONFIG_64BIT for guarding this new flag]
    Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    4beba948
page-types.c 29.9 KB