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| author | H. Peter Anvin <hpa@zytor.com> | 2009-03-28 21:53:26 +0100 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2009-03-29 03:20:07 +0200 |
| commit | c549e71d073a6e9a4847497344db28a784061455 (patch) | |
| tree | 60c41d640ecf696d0534f744fafe8bf2023c4254 /security/smack | |
| parent | x86, setup: preemptively save/restore edi and ebp around INT 15 E820 (diff) | |
| download | linux-c549e71d073a6e9a4847497344db28a784061455.tar.xz linux-c549e71d073a6e9a4847497344db28a784061455.zip | |
x86, setup: ACPI 3, BIOS workaround for E820-probing code
Impact: ACPI 3 spec compliance, BIOS bug workaround
The ACPI 3 spec added another field to the E820 buffer -- which is
backwards incompatible, since it contains a validity bit.
Furthermore, there has been at least one report of a BIOS which
assumes that the buffer it is pointed at is the same buffer as for the
previous E820 call. Therefore, read the data into a temporary buffer
and copy the standard part of it if and only if the valid bit is set.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'security/smack')
0 files changed, 0 insertions, 0 deletions