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| author | Cao jin <caoj.fnst@cn.fujitsu.com> | 2016-11-02 21:44:47 +0800 |
|---|---|---|
| committer | Michael Tokarev <mjt@tls.msk.ru> | 2017-01-24 23:26:53 +0300 |
| commit | 6e4c890e15b23f078650499fbde11760b8eccf10 (patch) | |
| tree | 0c606e5587a6c6a59b10d297e19ef9f5ca48f6a8 /include/glib-compat.h | |
| parent | 4a3ecf201a1a49a804e8506df5906e446707c3b1 (diff) | |
util/mmap-alloc: refactor a little bit for readability
1st mmap returns *ptr* which aligns to host page size,
| size + align |
------------------------------------------
ptr
input param *align* could be 1M, or 2M, or host page size. After
QEMU_ALIGN_UP, offset will >= 0
2nd mmap use flag MAP_FIXED, then it return ptr+offset, or else fail.
If it success, then we will have something like:
| offset | size |
--------------------------------------
ptr ptr1
*ptr1* is what we really want to return, it equals ptr+offset.
Signed-off-by: Cao jin <caoj.fnst@cn.fujitsu.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Diffstat (limited to 'include/glib-compat.h')
0 files changed, 0 insertions, 0 deletions