* malloc/arena.c (heap_info): Add mprotect_size field, adjust pad.

* malloc/arena.c (heap_info): Add mprotect_size field, adjust pad.

(new_heap): Initialize mprotect_size.
(grow_heap): When growing, only mprotect from mprotect_size till
new_size if mprotect_size is smaller.  When shrinking, use PROT_NONE
MMAP for __libc_enable_secure only, otherwise use MADV_DONTNEED.
2007-05-07  Ulrich Drepper  <drepper@redhat.com>
	    Jakub Jelinek  <jakub@redhat.com>

	* malloc/arena.c (heap_info): Add mprotect_size field, adjust pad.
	(new_heap): Initialize mprotect_size.
	(grow_heap): When growing, only mprotect from mprotect_size till
	new_size if mprotect_size is smaller.  When shrinking, use PROT_NONE
	MMAP for __libc_enable_secure only, otherwise use MADV_DONTNEED.