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x86: documentation fix regarding boot protocol 

Impact: clarify documentation

Documentation/x86/boot.txt describes payload_offset as the offset
from the end of the real-mode code. In fact, it is more accurately
described as the offset from the beginning of the protected-mode
code, as (a) this is how it is actually calculated and (b) the padding
after the real-mode code is not included in the offset.

Signed-off-by: Philipp Kohlbecher <xt28@gmx.de>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Philipp Kohlbecher 2008-12-14 18:50:01 +01:00 committed by Ingo Molnar
parent 78f902ccc5
commit e1286f2c68
1 changed files with 2 additions and 2 deletions
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Documentation/x86/boot.txt
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@ -537,8 +537,8 @@ Type: read
Offset/size: 0x248/4
Protocol: 2.08+
If non-zero then this field contains the offset from the end of the
real-mode code to the payload.
If non-zero then this field contains the offset from the beginning
of the protected-mode code to the payload.
The payload may be compressed. The format of both the compressed and
uncompressed data should be determined using the standard magic