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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-06-20 08:25:44 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-06-20 08:25:44 -0700 |
| commit | af52739b922f656eb1f39016fabaabe4baeda2e2 (patch) | |
| tree | 79a7aa810d0493cd0cf4adebac26d37f12e8b545 /mm/fadvise.c | |
| parent | 25ed6a5e97809129a1bc852b6b5c7d03baa112c4 (diff) | |
| parent | 33688abb2802ff3a230bd2441f765477b94cc89e (diff) | |
| download | op-kernel-dev-af52739b922f656eb1f39016fabaabe4baeda2e2.zip op-kernel-dev-af52739b922f656eb1f39016fabaabe4baeda2e2.tar.gz | |
Merge 4.7-rc4 into staging-next
We want the fixes in here, and we can resolve a merge issue in
drivers/iio/industrialio-trigger.c
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm/fadvise.c')
| -rw-r--r-- | mm/fadvise.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/mm/fadvise.c b/mm/fadvise.c index b8024fa..6c707bf 100644 --- a/mm/fadvise.c +++ b/mm/fadvise.c @@ -126,6 +126,17 @@ SYSCALL_DEFINE4(fadvise64_64, int, fd, loff_t, offset, loff_t, len, int, advice) */ start_index = (offset+(PAGE_SIZE-1)) >> PAGE_SHIFT; end_index = (endbyte >> PAGE_SHIFT); + if ((endbyte & ~PAGE_MASK) != ~PAGE_MASK) { + /* First page is tricky as 0 - 1 = -1, but pgoff_t + * is unsigned, so the end_index >= start_index + * check below would be true and we'll discard the whole + * file cache which is not what was asked. + */ + if (end_index == 0) + break; + + end_index--; + } if (end_index >= start_index) { unsigned long count = invalidate_mapping_pages(mapping, |
