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Report exFAT's case sensitivity behavior via the FS_XFLAG_CASEFOLD flag. exFAT compares names through the volume's upcase table; in practice that table folds case, and case is preserved at rest. Acked-by: Namjae Jeon <linkinjeon@kernel.org> Reviewed-by: Roland Mainz <roland.mainz@nrubsig.org> Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Link: https://github.com/exfatprogs/exfatprogs/issues/313 Link: https://patch.msgid.link/20260507-case-sensitivity-v14-4-e62cc8200435@oracle.com Signed-off-by: Christian Brauner <brauner@kernel.org>