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| author |   Oleg Nesterov <oleg@redhat.com> | 2012-07-29 20:22:18 +0200 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2012-07-30 11:27:19 +0200 |
| commit | 089ba999dc881a7549d97c55ac9e0052d061867d (patch) | |
| tree | e5278f9ecb3a7405545b940b9b64abeb2121b4cc /kernel/rcutiny_plugin.h | |
| parent | uprobes: __replace_page() should not use page_address_in_vma() (diff) | |
| download | linux-dev-089ba999dc881a7549d97c55ac9e0052d061867d.tar.xz linux-dev-089ba999dc881a7549d97c55ac9e0052d061867d.zip | |
uprobes: Kill write_opcode()->lock_page(new_page)
write_opcode() does lock_page(new_page) for no reason. Nobody
can see this page until __replace_page() exposes it under ptl
lock, and we do nothing with this page after pte_unmap_unlock().
If nothing else, the similar code in do_wp_page() doesn't lock
the new page for page_add_new_anon_rmap/set_pte_at_notify.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Srikar Dronamraju <srikar.vnet.ibm.com>
Cc: Anton Arapov <anton@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/20120729182218.GA20315@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/rcutiny_plugin.h')
0 files changed, 0 insertions, 0 deletions