[iov_iter] new privimitive: iov_iter_revert()

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opposite to iov_iter_advance(); the caller is responsible for never
using it to move back past the initial position.

Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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Al Viro 2017-02-17 18:42:24 -05:00

parent c02ed2e75e

commit 27c0e3748e

2 changed files with 68 additions and 1 deletions

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6

include/linux/uio.h

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63

lib/iov_iter.c

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