proc: fix documentation and description of pagemap

Since bit 57 was exported for uffd-wp write-protected (commit
fb8e37f35a2f: "mm/pagemap: export uffd-wp protection information"),
fixing it can reduce some unnecessary confusion.

Link: https://lkml.kernel.org/r/[email protected]
Fixes: fb8e37f35a2fe1 ("mm/pagemap: export uffd-wp protection information")
Signed-off-by: Yun Zhou <[email protected]>
Reviewed-by: Peter Xu <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Tiberiu A Georgescu <[email protected]>
Cc: Florian Schmidt <[email protected]>
Cc: Ivan Teterevkov <[email protected]>
Cc: SeongJae Park <[email protected]>
Cc: Yang Shi <[email protected]>
Cc: David Hildenbrand <[email protected]>
Cc: Axel Rasmussen <[email protected]>
Cc: Miaohe Lin <[email protected]>
Cc: Andrea Arcangeli <[email protected]>
Cc: Colin Cross <[email protected]>
Cc: Alistair Popple <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions