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-simple/alloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'libc/stdlib/malloc-simple') diff --git a/libc/stdlib/malloc-simple/alloc.c b/libc/stdlib/malloc-simple/alloc.c index 36355c1e9..51da14ac8 100644 --- a/libc/stdlib/malloc-simple/alloc.c +++ b/libc/stdlib/malloc-simple/alloc.c @@ -36,7 +36,7 @@ void *malloc(size_t size) #ifdef __ARCH_USE_MMU__ # define MMAP_FLAGS MAP_PRIVATE | MAP_ANONYMOUS #else -# define MMAP_FLAGS MAP_SHARED | MAP_ANONYMOUS +# define MMAP_FLAGS MAP_SHARED | MAP_ANONYMOUS | MAP_UNINITIALIZE #endif result = mmap((void *) 0, size + sizeof(size_t), PROT_READ | PROT_WRITE, -- cgit v1.2.3