path: root/arch/s390/mm/hugetlbpage.c
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authorHugh Dickins <hughd@google.com>2014-06-04 16:05:33 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-04 16:53:51 -0700
commit7f39dda9d86fb4f4f17af0de170decf125726f8c (patch)
tree30c87e21eb0ad3366033a8d93f70a08dc02b7df0 /arch/s390/mm/hugetlbpage.c
parentMAINTAINERS: pass on hwpoison maintainership to Naoya Horiguchi (diff)
mm: fix sleeping function warning from __put_anon_vma
Trinity reports BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:47 in_atomic(): 0, irqs_disabled(): 0, pid: 5787, name: trinity-c27 __might_sleep < down_write < __put_anon_vma < page_get_anon_vma < migrate_pages < compact_zone < compact_zone_order < try_to_compact_pages .. Right, since conversion to mutex then rwsem, we should not put_anon_vma() from inside an rcu_read_lock()ed section: fix the two places that did so. And add might_sleep() to anon_vma_free(), as suggested by Peter Zijlstra. Fixes: 88c22088bf23 ("mm: optimize page_lock_anon_vma() fast-path") Reported-by: Dave Jones <davej@redhat.com> Signed-off-by: Hugh Dickins <hughd@google.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/s390/mm/hugetlbpage.c')
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