tree 924e8cfcb1516b29468696b7384a1a9195806bbb
parent c671e1e30259da587d7a0162895200601979ee65
author Linus Torvalds <torvalds@linux-foundation.org> 1453084395 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1453084395 -0800

vm: fix incorrect unlock error path in madvise_free_huge_pmd

Commit b8d3c4c3009d ("mm/huge_memory.c: don't split THP page when
MADV_FREE syscall is called") introduced this new function, but got the
error handling for when pmd_trans_huge_lock() fails wrong.  In the
failure case, the lock has not been taken, and we should not unlock on
the way out.

Cc: Minchan Kim <minchan@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>