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84a8d467cc
Since v4.6 the BUDDY flag is set for _all_ pages in the block
and no longer just for the first one.
This change was introduced by:
commit 832fc1de01 ("/proc/kpageflags: return KPF_BUDDY for "tail" buddy pages")
Strictly speaking, this was an ABI change, but as nobody has noticed
since 2016, let's just update the documentation.
Link: https://lkml.kernel.org/r/20251122211920.3410371-1-richard@nod.at
Signed-off-by: Richard Weinberger <richard@nod.at>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Acked-by: David Hildenbrand (Red Hat) <david@kernel.org>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Cc: Vladimir Davydov <vdavydov@virtuozzo.com>>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>