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VM: add "vm_munmap()" helper function

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Like the vm_brk() function, this is the same as "do_munmap()", except it
does the VM locking for the caller.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds
2012-04-20 16:20:01 -07:00
parent e4eb1ff61b
commit a46ef99d80
8 changed files with 28 additions and 36 deletions
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4
drivers/gpu/drm/i810/i810_dma.c
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@@ -157,11 +157,9 @@ static int i810_unmap_buffer(struct drm_buf *buf)
if (buf_priv->currently_mapped != I810_BUF_MAPPED)
return -EINVAL;
down_write(&current->mm->mmap_sem);
retcode = do_munmap(current->mm,
retcode = vm_munmap(current->mm,
(unsigned long)buf_priv->virtual,
(size_t) buf->total);
up_write(&current->mm->mmap_sem);
buf_priv->currently_mapped = I810_BUF_UNMAPPED;
buf_priv->virtual = NULL;