diff options
| author | Andrew Morton <akpm@osdl.org> | 2007-10-16 10:24:54 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 18:42:54 +0200 |
| commit | 4b49643fbb3fa8bf4910f82be02d45e94e8972a4 (patch) | |
| tree | ee3bc7881a1e0b71fa093254bb725ad467d8ef72 /mm | |
| parent | mm: revert KERNEL_DS buffered write optimisation (diff) | |
| download | linux-4b49643fbb3fa8bf4910f82be02d45e94e8972a4.tar.xz linux-4b49643fbb3fa8bf4910f82be02d45e94e8972a4.zip | |
Revert "[PATCH] generic_file_buffered_write(): handle zero-length iovec segments"
This reverts commit 81b0c8713385ce1b1b9058e916edcf9561ad76d6, which was
a bugfix against 6527c2bdf1f833cc18e8f42bd97973d583e4aa83 ("[PATCH]
generic_file_buffered_write(): deadlock on vectored write"), which we
also revert.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/filemap.c | 9 | ||||
| -rw-r--r-- | mm/filemap.h | 4 |
2 files changed, 3 insertions, 10 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index c504db18ac26..caaaa7adfdf9 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1895,12 +1895,6 @@ generic_file_buffered_write(struct kiocb *iocb, const struct iovec *iov, break; } - if (unlikely(bytes == 0)) { - status = 0; - copied = 0; - goto zero_length_segment; - } - status = a_ops->prepare_write(file, page, offset, offset+bytes); if (unlikely(status)) { loff_t isize = i_size_read(inode); @@ -1930,8 +1924,7 @@ generic_file_buffered_write(struct kiocb *iocb, const struct iovec *iov, page_cache_release(page); continue; } -zero_length_segment: - if (likely(copied >= 0)) { + if (likely(copied > 0)) { if (!status) status = copied; diff --git a/mm/filemap.h b/mm/filemap.h index c2bff04c84ed..a1e10a232e92 100644 --- a/mm/filemap.h +++ b/mm/filemap.h @@ -87,7 +87,7 @@ filemap_set_next_iovec(const struct iovec **iovp, size_t *basep, size_t bytes) const struct iovec *iov = *iovp; size_t base = *basep; - do { + while (bytes) { int copy = min(bytes, iov->iov_len - base); bytes -= copy; @@ -96,7 +96,7 @@ filemap_set_next_iovec(const struct iovec **iovp, size_t *basep, size_t bytes) iov++; base = 0; } - } while (bytes); + } *iovp = iov; *basep = base; } |