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| author | Joonsoo Kim <js1304@gmail.com> | 2015-07-17 16:24:23 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-07-17 16:39:54 -0700 |
| commit | d56e84b4064d65285161d6bfa04382e1cdd4e49c (patch) | |
| tree | ed35ca7cffee972c75be915ca25298dfeea0c78c | |
| parent | 2292c0b1c4a24da54e29b3cf0645b4a4d9c3f2c7 (diff) | |
| download | linux-d56e84b4064d65285161d6bfa04382e1cdd4e49c.tar.bz2 | |
mm/cma_debug: correct size input to bitmap function
In CMA, 1 bit in bitmap means 1 << order_per_bits pages so size of
bitmap is cma->count >> order_per_bits rather than just cma->count.
This patch fixes it.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Stefan Strogin <stefan.strogin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/cma_debug.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/mm/cma_debug.c b/mm/cma_debug.c index 22190a7fd58e..f8e4b60db167 100644 --- a/mm/cma_debug.c +++ b/mm/cma_debug.c @@ -39,7 +39,7 @@ static int cma_used_get(void *data, u64 *val) mutex_lock(&cma->lock); /* pages counter is smaller than sizeof(int) */ - used = bitmap_weight(cma->bitmap, (int)cma->count); + used = bitmap_weight(cma->bitmap, (int)cma_bitmap_maxno(cma)); mutex_unlock(&cma->lock); *val = (u64)used << cma->order_per_bit; @@ -52,13 +52,14 @@ static int cma_maxchunk_get(void *data, u64 *val) struct cma *cma = data; unsigned long maxchunk = 0; unsigned long start, end = 0; + unsigned long bitmap_maxno = cma_bitmap_maxno(cma); mutex_lock(&cma->lock); for (;;) { - start = find_next_zero_bit(cma->bitmap, cma->count, end); + start = find_next_zero_bit(cma->bitmap, bitmap_maxno, end); if (start >= cma->count) break; - end = find_next_bit(cma->bitmap, cma->count, start); + end = find_next_bit(cma->bitmap, bitmap_maxno, start); maxchunk = max(end - start, maxchunk); } mutex_unlock(&cma->lock); |