nommu: use MAP_UNINITIALIZE for mallocs

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>

1 files changed, 1 insertions, 1 deletions

diff --git a/ldso/ldso/ldso.c b/ldso/ldso/ldso.c
index 45d499574..01e707166 100644
--- a/ldso/ldso/ldso.c
+++ b/ldso/ldso/ldso.c
@@ -193,7 +193,7 @@ void *_dl_malloc(size_t size)
 
 		_dl_debug_early("mmapping more memory\n");
 		_dl_mmap_zero = _dl_malloc_addr = _dl_mmap((void *) 0, rounded_size,
-				PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+				PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_UNINITIALIZE, -1, 0);
 		if (_dl_mmap_check_error(_dl_mmap_zero)) {
 			_dl_dprintf(_dl_debug_file, "%s: mmap of a spare page failed!\n", _dl_progname);
 			_dl_exit(20);