mm: refactor swap-in logic out of shmem_getpage_gfp
swapin logic can be reused independently without rest of the logic in shmem_getpage_gfp. So lets refactor it out as an independent function. Link: http://lkml.kernel.org/r/20190114153129.4852-1-vpillai@digitalocean.comSigned-off-by: Vineeth Remanan Pillai <vpillai@digitalocean.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Huang Ying <ying.huang@intel.com> Cc: Hugh Dickins <hughd@google.com> Cc: Kelley Nielsen <kelleynnn@gmail.com> Cc: Rik van Riel <riel@surriel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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