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authorChristoph Hellwig <hch@lst.de>2020-09-03 17:59:22 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-09-03 19:50:47 +0200
commit99f667352f6c938440d9043d0f66f859d6f3d50d (patch)
treebf5c687509f17d774cd978ac684c2a2c157d6ca2 /drivers/greybus
parent261e7818f06ec51e488e007f787ccd7e77272918 (diff)
/dev/zero: also implement ->read
Christophe reported a major speedup due to avoiding the iov_iter overhead, so just add this trivial function. Note that /dev/zero already implements both an iter and non-iter writes so this just makes it more symmetric. Tested-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20200903155922.1111551-1-hch@lst.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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