From 00673f93826bf1fbde728d202c319a684bb87150 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Mon, 23 Nov 2009 21:35:34 -0500 Subject: 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 --- libc/stdlib/malloc/malloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'libc/stdlib/malloc/malloc.c') diff --git a/libc/stdlib/malloc/malloc.c b/libc/stdlib/malloc/malloc.c index f4bbc71a2..337206f09 100644 --- a/libc/stdlib/malloc/malloc.c +++ b/libc/stdlib/malloc/malloc.c @@ -124,7 +124,7 @@ __malloc_from_heap (size_t size, struct heap_free_area **heap MAP_PRIVATE | MAP_ANONYMOUS, 0, 0); #else block = mmap ((void *)0, block_size, PROT_READ | PROT_WRITE, - MAP_SHARED | MAP_ANONYMOUS, 0, 0); + MAP_SHARED | MAP_ANONYMOUS | MAP_UNINITIALIZE, 0, 0); #endif #endif /* MALLOC_USE_SBRK */ -- cgit v1.2.3