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| author | Hugh Dickins <hugh@veritas.com> | 2005-11-22 06:32:12 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-22 18:13:42 +0100 |
| commit | 83e9b7e929d1323b9a155d186f77aa8c06155cc3 (patch) | |
| tree | 3cad39e867ca337b08bc4a7309c2b17787abd527 /sound/usb | |
| parent | [PATCH] unpaged: get_user_pages VM_RESERVED (diff) | |
| download | linux-83e9b7e929d1323b9a155d186f77aa8c06155cc3.tar.xz linux-83e9b7e929d1323b9a155d186f77aa8c06155cc3.zip | |
[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/usb')
0 files changed, 0 insertions, 0 deletions