https://github.com/torvalds/linux
Revision 5c279c4cf206e03995e04fd3404fa95ffd243a97 authored by Mike Rapoport on 04 February 2021, 18:12:37 UTC, committed by Linus Torvalds on 04 February 2021, 18:26:53 UTC
This reverts commit bde9cfa3afe4324ec251e4af80ebf9b7afaf7afe.

Changing the first memory page type from E820_TYPE_RESERVED to
E820_TYPE_RAM makes it a part of "System RAM" resource rather than a
reserved resource and this in turn causes devmem_is_allowed() to treat
is as area that can be accessed but it is filled with zeroes instead of
the actual data as previously.

The change in /dev/mem output causes lilo to fail as was reported at
slakware users forum, and probably other legacy applications will
experience similar problems.

Link: https://www.linuxquestions.org/questions/slackware-14/slackware-current-lilo-vesa-warnings-after-recent-updates-4175689617/#post6214439
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 927002e
History
Tip revision: 5c279c4cf206e03995e04fd3404fa95ffd243a97 authored by Mike Rapoport on 04 February 2021, 18:12:37 UTC
Revert "x86/setup: don't remove E820_TYPE_RAM for pfn 0"
Tip revision: 5c279c4
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.clang-format -rw-r--r-- 16.3 KB
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.gitattributes -rw-r--r-- 62 bytes
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COPYING -rw-r--r-- 496 bytes
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