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->splice_write() via ->write_iter()

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iter_file_splice_write() - a ->splice_write() instance that gathers the
pipe buffers, builds a bio_vec-based iov_iter covering those and feeds
it to ->write_iter().  A bunch of simple cases coverted to that...

[AV: fixed the braino spotted by Cyrill]

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2014-04-05 04:27:08 -04:00
parent 62a8067a7f
commit 8d0207652c
16 changed files with 156 additions and 56 deletions
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fs/block_dev.c
+1 -1
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@@ -1583,7 +1583,7 @@ const struct file_operations def_blk_fops = {
.compat_ioctl = compat_blkdev_ioctl,
#endif
.splice_read = generic_file_splice_read,
.splice_write = generic_file_splice_write,
.splice_write = iter_file_splice_write,
};
int ioctl_by_bdev(struct block_device *bdev, unsigned cmd, unsigned long arg)