diff options
| author | Olof Johansson <olof@lixom.net> | 2016-06-18 22:59:07 -0700 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2016-06-18 22:59:07 -0700 |
| commit | 8fd0976702f05042c776848819e5fd2a835f23c9 (patch) | |
| tree | 8a87b0e33bf39adcc53b3ee4be61155dab86417b /mm/fadvise.c | |
| parent | 58935f24a996cb55595c29dd5303bd9b778c8b00 (diff) | |
| parent | 8f50b8e57442d28e41bb736c173d8a2490549a82 (diff) | |
Merge tag 'gpmc-omap-fixes-for-v4.7' of https://github.com/rogerq/linux into fixes
OMAP-GPMC: Fixes for for v4.7-rc cycle:
- Fix omap gpmc EXTRADELAY timing. The DT provided timings
were wrongly used causing devices requiring extra delay timing
to fail.
* tag 'gpmc-omap-fixes-for-v4.7' of https://github.com/rogerq/linux:
memory: omap-gpmc: Fix omap gpmc EXTRADELAY timing
+ Linux 4.7-rc3
Signed-off-by: Olof Johansson <olof@lixom.net>
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 b8024fa7101d..6c707bfe02fd 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, |