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fs/9p: remove unnecessary and overrestrictive check
commit 75b3968 upstream. This eliminates a check for shared that was overrestrictive and prevented read-only mmaps when writeback caches weren't enabled. Cc: stable@vger.kernel.org Fixes: 1543b4c ("fs/9p: remove writeback fid and fix per-file modes") Reported-by: Robert Schwebel <r.schwebel@pengutronix.de> Closes: https://lore.kernel.org/v9fs/ZK25XZ%2BGpR3KHIB%2F@pengutronix.de Reviewed-by: Dominique Martinet <asmadeus@codewreck.org> Reviewed-by: Christian Schoenebeck <linux_oss@crudebyte.com> Signed-off-by: Eric Van Hensbergen <ericvh@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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