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author | Takashi Iwai <tiwai@suse.de> | 2017-10-05 15:08:57 +0200 |
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committer | Takashi Iwai <tiwai@suse.de> | 2017-10-05 15:08:57 +0200 |
commit | 3a9fce327ff9cabf7f89d3f20616a83af28393da (patch) | |
tree | c516d3e7023e7fe2dc8d4cf60e2ec03f3c9b5958 /mm/filemap.c | |
parent | e195a331c4124a6527e5e1b6fbd93a6b4a984d7b (diff) | |
parent | 394ca81cb4c1518e9463fe342fb1ae8a9f46a82d (diff) |
Merge branch 'topic/timer-api' into for-next
Diffstat (limited to 'mm/filemap.c')
-rw-r--r-- | mm/filemap.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index 870971e20967..db250d0e0565 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -2926,9 +2926,15 @@ generic_file_direct_write(struct kiocb *iocb, struct iov_iter *from) * we're writing. Either one is a pretty crazy thing to do, * so we don't support it 100%. If this invalidation * fails, tough, the write still worked... + * + * Most of the time we do not need this since dio_complete() will do + * the invalidation for us. However there are some file systems that + * do not end up with dio_complete() being called, so let's not break + * them by removing it completely */ - invalidate_inode_pages2_range(mapping, - pos >> PAGE_SHIFT, end); + if (mapping->nrpages) + invalidate_inode_pages2_range(mapping, + pos >> PAGE_SHIFT, end); if (written > 0) { pos += written; |