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| author | Maksym Planeta <mcsim.planeta@gmail.com> | 2012-04-07 17:57:44 +0300 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2012-04-08 22:06:09 +0200 |
| commit | 254f7ca7e25aa91b28c49695de552042a880d18b (patch) | |
| tree | 4be2dae4c284c2ee3113d7aaeff9fdba768ea29a | |
| parent | 615b470e8afb140ac45afcb01c402391c2b3b013 (diff) | |
Add support for empty memory objects.
* mach-defpager/default_pager.c (pager_extend): When old_size is 0, use 1 to
compute power of two above it.
(pager_truncate): Do not avoid new_size being 0.
| -rw-r--r-- | mach-defpager/default_pager.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/mach-defpager/default_pager.c b/mach-defpager/default_pager.c index 5a83f437..5780322e 100644 --- a/mach-defpager/default_pager.c +++ b/mach-defpager/default_pager.c @@ -894,7 +894,8 @@ pager_extend(pager, new_size) old_size = pager->size; if (new_size <= atop(max_doubled_size)) { - i = old_size; + /* New size cannot be less than 1 */ + i = old_size ? old_size : 1; while (i < new_size) i <<= 1; new_size = i; @@ -1115,9 +1116,6 @@ pager_truncate(dpager_t pager, vm_size_t new_size) /* in pages */ } } - if (new_size == 0) - new_size = 1; - if (! INDIRECT_PAGEMAP(old_size)) { /* First deallocate pages in the truncated region. */ |