mmap_region: cleanup the final vma_merge() related code
It is not easy to actually understand the "if (!file || !vma_merge())" code, turn it into "if (file && vma_merge())". This makes immediately obvious that the subsequent "if (file)" is superfluous. As Hugh Dickins pointed out, we can also factor out the ->i_writecount corrections, and add a small comment about that. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Cc: Miklos Szeredi <miklos@szeredi.hu> Cc: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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