diff options
| author | Mike Frysinger <vapier@gentoo.org> | 2009-11-23 21:35:34 -0500 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2009-11-23 21:35:34 -0500 |
| commit | 00673f93826bf1fbde728d202c319a684bb87150 (patch) | |
| tree | 2918312040781ebf7055ca83321605e7b110002d /libc/sysdeps/linux/mips/bits | |
| parent | c5bc75430dccfaef12220311aa4853176a8a911b (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/sysdeps/linux/mips/bits')
| -rw-r--r-- | libc/sysdeps/linux/mips/bits/mman.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/mips/bits/mman.h b/libc/sysdeps/linux/mips/bits/mman.h index 47d33933a..c480be46e 100644 --- a/libc/sysdeps/linux/mips/bits/mman.h +++ b/libc/sysdeps/linux/mips/bits/mman.h @@ -66,6 +66,8 @@ # define MAP_LOCKED 0x8000 /* pages are locked */ # define MAP_POPULATE 0x10000 /* populate (prefault) pagetables */ # define MAP_NONBLOCK 0x20000 /* do not block on IO */ +# define MAP_UNINITIALIZE 0x4000000 /* For anonymous mmap, memory could + be uninitialized. */ #endif /* Flags to `msync'. */ |