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Signed-off-by: John Garry --- include/linux/fs.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/include/linux/fs.h b/include/linux/fs.h index 069cbab62700..e13d34f8c24e 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -3645,4 +3645,16 @@ bool generic_atomic_write_valid(loff_t pos, struct iov_iter *iter) return true; } +static inline +bool generic_atomic_write_valid_size(loff_t pos, struct iov_iter *iter, + unsigned int unit_min, unsigned int unit_max) +{ + size_t len = iov_iter_count(iter); + + if (len < unit_min || len > unit_max) + return false; + + return generic_atomic_write_valid(pos, iter); +} + #endif /* _LINUX_FS_H */