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mm: move common segment checks to separate helper function

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[[email protected]: cleanup]
Signed-off-by: Monakhov Dmitriy <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Acked-by: Anton Altaparmakov <[email protected]>
Acked-by: David Chinner <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Dmitriy Monakhov 2007-05-08 00:23:02 -07:00 • committed by Linus Torvalds
commit 0ceb331433
4 changed files with 53 additions and 74 deletions
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21
fs/ntfs/file.c
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@ -2129,28 +2129,13 @@ static ssize_t ntfs_file_aio_write_nolock(struct kiocb *iocb,
struct address_space *mapping = file->f_mapping;
struct inode *inode = mapping->host;
loff_t pos;
unsigned long seg;
size_t count; /* after file limit checks */
ssize_t written, err;
count = 0;
for (seg = 0; seg < nr_segs; seg++) {
const struct iovec *iv = &iov[seg];
/*
* If any segment has a negative length, or the cumulative
* length ever wraps negative then return -EINVAL.
*/
count += iv->iov_len;
if (unlikely((ssize_t)(count|iv->iov_len) < 0))
return -EINVAL;
if (access_ok(VERIFY_READ, iv->iov_base, iv->iov_len))
continue;
if (!seg)
return -EFAULT;
nr_segs = seg;
count -= iv->iov_len; /* This segment is no good */
break;
}
err = generic_segment_checks(iov, &nr_segs, &count, VERIFY_READ);
if (err)
return err;
pos = *ppos;
vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE);
/* We can write back this queue in page reclaim. */