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| author | Al Viro <viro@zeniv.linux.org.uk> | 2014-03-19 01:16:16 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2014-05-06 17:32:52 -0400 |
| commit | f67da30c1d5fc9e341bc8121708874bfd7b31e45 (patch) | |
| tree | 504966ed27e82dbcbe31786c9a0851a4ae79ef3e /fs/direct-io.c | |
| parent | 5b46f25ddc6edf4adff1a137d453da542c27a640 (diff) | |
| download | linux-f67da30c1d5fc9e341bc8121708874bfd7b31e45.tar.bz2 | |
new helper: iov_iter_npages()
counts the pages covered by iov_iter, up to given limit.
do_block_direct_io() and fuse_iter_npages() switched to
it.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/direct-io.c')
| -rw-r--r-- | fs/direct-io.c | 9 |
1 files changed, 1 insertions, 8 deletions
diff --git a/fs/direct-io.c b/fs/direct-io.c index 4b410d58faae..98040ba388ac 100644 --- a/fs/direct-io.c +++ b/fs/direct-io.c @@ -1100,7 +1100,6 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode, get_block_t get_block, dio_iodone_t end_io, dio_submit_t submit_io, int flags) { - int seg; unsigned i_blkbits = ACCESS_ONCE(inode->i_blkbits); unsigned blkbits = i_blkbits; unsigned blocksize_mask = (1 << blkbits) - 1; @@ -1108,7 +1107,6 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode, loff_t end = offset + iov_iter_count(iter); struct dio *dio; struct dio_submit sdio = { 0, }; - unsigned long user_addr; struct buffer_head map_bh = { 0, }; struct blk_plug plug; unsigned long align = offset | iov_iter_alignment(iter); @@ -1231,12 +1229,7 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode, if (unlikely(sdio.blkfactor)) sdio.pages_in_io = 2; - for (seg = 0; seg < iter->nr_segs; seg++) { - user_addr = (unsigned long)iter->iov[seg].iov_base; - sdio.pages_in_io += - ((user_addr + iter->iov[seg].iov_len + PAGE_SIZE-1) / - PAGE_SIZE - user_addr / PAGE_SIZE); - } + sdio.pages_in_io += iov_iter_npages(iter, INT_MAX); blk_start_plug(&plug); |