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| author | Andreas Oetken <andreas.oetken@siemens.com> | 2021-02-19 09:41:50 +0300 |
|---|---|---|
| committer | Ley Foon Tan <ley.foon.tan@intel.com> | 2021-02-19 10:02:09 +0300 |
| commit | 7f7bc20bc41a4fbcd2db75b375ac95e5faf958ae (patch) | |
| tree | 7fd0a643490252fa9278414d1f5364e4521fc362 /Documentation | |
| parent | 9abcfcb20320e8f693e89d86573b58e6289931cb (diff) | |
| download | linux-7f7bc20bc41a4fbcd2db75b375ac95e5faf958ae.tar.xz | |
nios2: Don't use _end for calculating min_low_pfn
If there is a initramfs linked into the kernel which will be
freed later on there is free memory somewhere between _etext
and _end, thus using _end for min_low_pfn is not correct.
This may lead to issues in dma_capable when checking
'min(addr, end) < phys_to_dma(dev, PFN_PHYS(min_low_pfn)))'
as the address addr might be below min_low_pfn. Picked
find_limits from architecture arm for applying min_low_pfn and
max_low_pfn. Maybe using _etext for min_low_pfn would be
fine too.
Signed-off-by: Andreas Oetken <andreas.oetken@siemens.com>
Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions