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use less confusing names for iov_iter direction initializers

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READ/WRITE proved to be actively confusing - the meanings are
"data destination, as used with read(2)" and "data source, as
used with write(2)", but people keep interpreting those as
"we read data from it" and "we write data to it", i.e. exactly
the wrong way.

Call them ITER_DEST and ITER_SOURCE - at least that is harder
to misinterpret...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2022-09-15 20:25:47 -04:00
parent a41dad905e
commit de4eda9de2
87 changed files with 195 additions and 191 deletions
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2
fs/fscache/io.c
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@@ -286,7 +286,7 @@ void __fscache_write_to_cache(struct fscache_cookie *cookie,
* taken into account.
*/
iov_iter_xarray(&iter, WRITE, &mapping->i_pages, start, len);
iov_iter_xarray(&iter, ITER_SOURCE, &mapping->i_pages, start, len);
fscache_write(cres, start, &iter, fscache_wreq_done, wreq);
return;