Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

Fixes multiple race conditions on mmb list. This was done by
making the mmb_heap_lock into a recursive lock and making the
regular heap_lock extend to cover the mmb heap handling.

Also move the new_mmb allocation up to before the mmb list is
iterated through to find the insertion point. When the mmb_heap
also runs out and needs to be extended when the regular heap is
just extended, the mmb list could be messed up.

Signed-off-by: Freeman Wang <xwang@ubicom.com>
Signed-off-by: Austin Foxley <austinf@cetoncorp.com>

Now that the kernel supports MAP_UNINITIALIZE, have the malloc places use
it to get real uninitialized memory on no-mmu systems.  This avoids a lot
of normally useless overhead involved in zeroing out all of the memory
(sometimes multiple times).

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

The malloc() code checks the incoming size to make sure the header
adjustment doesn't cause overflow in the size storage.  Add the same
check to realloc() to catch stupid stuff like realloc(..., -1).

Reported-by: James Coleman <james.coleman@ubicom.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

  sed -i -e '/Experimentally off - /d' $(grep -rl "Experimentally off - " *)
  sed -i -e '/^\/\*[[:space:]]*libc_hidden_proto(/d' $(grep -rl "libc_hidden_proto" *)
  should be a nop

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

  Handle O=

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

  The sbrk lock is only needed for LT.old

Appears to build fine (several .configs tried)