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/hppa | |
| 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/hppa')
| -rw-r--r-- | libc/sysdeps/linux/hppa/bits/mman.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/hppa/bits/mman.h b/libc/sysdeps/linux/hppa/bits/mman.h index 54531ecf2..7f9bf4ed6 100644 --- a/libc/sysdeps/linux/hppa/bits/mman.h +++ b/libc/sysdeps/linux/hppa/bits/mman.h @@ -45,6 +45,8 @@ #define MAP_GROWSDOWN 0x8000 /* stack-like segment */ #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. */ #define MS_SYNC 1 /* synchronous memory sync */ #define MS_ASYNC 2 /* sync memory asynchronously */ |