diff options
Diffstat (limited to 'mm/zswap.c')
| -rw-r--r-- | mm/zswap.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/mm/zswap.c b/mm/zswap.c index f6c89049cf70..2f0ebd8bc620 100644 --- a/mm/zswap.c +++ b/mm/zswap.c @@ -1073,15 +1073,23 @@ fail: static int zswap_is_page_same_filled(void *ptr, unsigned long *value) { - unsigned int pos; unsigned long *page; + unsigned long val; + unsigned int pos, last_pos = PAGE_SIZE / sizeof(*page) - 1; page = (unsigned long *)ptr; - for (pos = 1; pos < PAGE_SIZE / sizeof(*page); pos++) { - if (page[pos] != page[0]) + val = page[0]; + + if (val != page[last_pos]) + return 0; + + for (pos = 1; pos < last_pos; pos++) { + if (val != page[pos]) return 0; } - *value = page[0]; + + *value = val; + return 1; } |