diff options
| -rw-r--r-- | mm/filemap.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index 65eee6ec1066..242cd8bd8330 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -506,9 +506,6 @@ static void __filemap_fdatawait_range(struct address_space *mapping, struct pagevec pvec; int nr_pages; - if (end_byte < start_byte) - return; - pagevec_init(&pvec); while (index <= end) { unsigned i; @@ -670,6 +667,9 @@ int filemap_write_and_wait_range(struct address_space *mapping, { int err = 0, err2; + if (lend < lstart) + return 0; + if (mapping_needs_writeback(mapping)) { err = __filemap_fdatawrite_range(mapping, lstart, lend, WB_SYNC_ALL); @@ -770,6 +770,9 @@ int file_write_and_wait_range(struct file *file, loff_t lstart, loff_t lend) int err = 0, err2; struct address_space *mapping = file->f_mapping; + if (lend < lstart) + return 0; + if (mapping_needs_writeback(mapping)) { err = __filemap_fdatawrite_range(mapping, lstart, lend, WB_SYNC_ALL); |