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authorMike Frysinger <vapier@gentoo.org>2009-11-23 21:35:34 -0500
committerMike Frysinger <vapier@gentoo.org>2009-11-23 21:35:34 -0500
commit00673f93826bf1fbde728d202c319a684bb87150 (patch)
tree2918312040781ebf7055ca83321605e7b110002d /libc/stdlib/malloc/malloc.c
parentc5bc75430dccfaef12220311aa4853176a8a911b (diff)
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>
Diffstat (limited to 'libc/stdlib/malloc/malloc.c')
-rw-r--r--libc/stdlib/malloc/malloc.c2
1 files changed, 1 insertions, 1 deletions
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 */