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| author | Marcin Nowakowski <marcin.nowakowski@imgtec.com> | 2016-11-23 14:43:44 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2017-01-03 16:34:45 +0100 |
| commit | e89ef66d7682f031f026eee6bba03c8c2248d2a9 (patch) | |
| tree | 3b6bcb90a6524ebb97734710c5d8845190f18406 /arch | |
| parent | MIPS: Do not request resources for crashkernel if one isn't defined (diff) | |
| download | linux-e89ef66d7682f031f026eee6bba03c8c2248d2a9.tar.xz linux-e89ef66d7682f031f026eee6bba03c8c2248d2a9.zip | |
MIPS: init: Ensure reserved memory regions are not added to bootmem
Memories managed through boot_mem_map are generally expected to define
non-crossing areas. However, if part of a larger memory block is marked
as reserved, it would still be added to bootmem allocator as an
available block and could end up being overwritten by the allocator.
Prevent this by explicitly marking the memory as reserved it if exists
in the range used by bootmem allocator.
Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14608/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/kernel/setup.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c index 0058feaa65e5..8ebad247ce82 100644 --- a/arch/mips/kernel/setup.c +++ b/arch/mips/kernel/setup.c @@ -483,6 +483,10 @@ static void __init bootmem_init(void) continue; default: /* Not usable memory */ + if (start > min_low_pfn && end < max_low_pfn) + reserve_bootmem(boot_mem_map.map[i].addr, + boot_mem_map.map[i].size, + BOOTMEM_DEFAULT); continue; } |