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drm/ttm: remove unneeded preempt_disable/enable

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It is unnecessary to disable preemption explicitly while calling
copy_highpage().  Because copy_highpage() will do it again through
kmap_atomic/kunmap_atomic.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Akinobu Mita 2012-11-09 12:10:43 +00:00 committed by Dave Airlie
parent ac207ed247
commit 55aa914e92
1 changed files with 0 additions and 4 deletions
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4
drivers/gpu/drm/ttm/ttm_tt.c
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@ -308,9 +308,7 @@ int ttm_tt_swapin(struct ttm_tt *ttm)
if (unlikely(to_page == NULL))
goto out_err;
preempt_disable();
copy_highpage(to_page, from_page);
preempt_enable();
page_cache_release(from_page);
}
@ -358,9 +356,7 @@ int ttm_tt_swapout(struct ttm_tt *ttm, struct file *persistent_swap_storage)
ret = PTR_ERR(to_page);
goto out_err;
}
preempt_disable();
copy_highpage(to_page, from_page);
preempt_enable();
set_page_dirty(to_page);
mark_page_accessed(to_page);
page_cache_release(to_page);