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authorHugh Dickins <hugh@veritas.com>2005-11-21 21:32:12 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-22 09:13:42 -0800
commit83e9b7e929d1323b9a155d186f77aa8c06155cc3 (patch)
tree3cad39e867ca337b08bc4a7309c2b17787abd527 /sound
parented5297a94090d9a9f27b0ce1f9601ebe73561cff (diff)
[PATCH] unpaged: private write VM_RESERVED
The PageReserved removal in 2.6.15-rc1 issued a "deprecated" message when you tried to mmap or mprotect MAP_PRIVATE PROT_WRITE a VM_RESERVED, and failed with -EACCES: because do_wp_page lacks the refinement to COW pages in those areas, nor do we expect to find anonymous pages in them; and it seemed just bloat to add code for handling such a peculiar case. But immediately it caused vbetool and ddcprobe (using lrmi) to fail. So revert the "deprecated" messages, letting mmap and mprotect succeed. But leave do_wp_page's BUG_ON(vma->vm_flags & VM_RESERVED) in place until we've added the code to do it right: so this particular patch is only good if the app doesn't really need to write to that private area. Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'sound')
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