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authorCarsten Otte <cotte@de.ibm.com>2007-03-29 01:20:39 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-03-29 08:22:26 -0700
commita76c0b976310bbb1b6eaecaaae465af194134477 (patch)
tree4f23a06244f7cb6689bd7ded80843c481968a283 /arch/ia64
parent90ed52ebe48181d3c5427b3bd1d24f659e7575ad (diff)
downloadop-kernel-dev-a76c0b976310bbb1b6eaecaaae465af194134477.zip
op-kernel-dev-a76c0b976310bbb1b6eaecaaae465af194134477.tar.gz
[PATCH] mm: fix xip issue with /dev/zero
Fix the bug, that reading into xip mapping from /dev/zero fills the user page table with ZERO_PAGE() entries. Later on, xip cannot tell which pages have been ZERO_PAGE() filled by access to a sparse mapping, and which ones origin from /dev/zero. It will unmap ZERO_PAGE from all mappings when filling the sparse hole with data. xip does now use its own zeroed page for its sparse mappings. Please apply. Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Hugh Dickins <hugh@veritas.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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