fscrypt: Cleanup page locking requirements for fscrypt_{decrypt,encrypt}_page()
Rename the FS_CFLG_INPLACE_ENCRYPTION flag to FS_CFLG_OWN_PAGES which, when set, indicates that the fs uses pages under its own control as opposed to writeback pages which require locking and a bounce buffer for encryption. Signed-off-by: NDavid Gstir <david@sigma-star.at> Signed-off-by: NTheodore Ts'o <tytso@mit.edu>
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