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| author | Ingo Molnar <mingo@kernel.org> | 2016-01-29 09:41:18 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-01-29 09:41:18 +0100 |
| commit | 76b36fa896a2db64582690e085f36adc76604134 (patch) | |
| tree | 78007f123ead6f96cdee6ba98ac3c289c706cc39 /arch/x86/mm/mmap.c | |
| parent | x86/asm: Remove unused L3_PAGE_OFFSET (diff) | |
| parent | Linux 4.5-rc1 (diff) | |
| download | linux-76b36fa896a2db64582690e085f36adc76604134.tar.xz linux-76b36fa896a2db64582690e085f36adc76604134.zip | |
Merge tag 'v4.5-rc1' into x86/asm, to refresh the branch before merging new changes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/mm/mmap.c')
| -rw-r--r-- | arch/x86/mm/mmap.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/arch/x86/mm/mmap.c b/arch/x86/mm/mmap.c index 844b06d67df4..96bd1e2bffaf 100644 --- a/arch/x86/mm/mmap.c +++ b/arch/x86/mm/mmap.c @@ -69,14 +69,14 @@ unsigned long arch_mmap_rnd(void) { unsigned long rnd; - /* - * 8 bits of randomness in 32bit mmaps, 20 address space bits - * 28 bits of randomness in 64bit mmaps, 40 address space bits - */ if (mmap_is_ia32()) - rnd = (unsigned long)get_random_int() % (1<<8); +#ifdef CONFIG_COMPAT + rnd = (unsigned long)get_random_int() & ((1 << mmap_rnd_compat_bits) - 1); +#else + rnd = (unsigned long)get_random_int() & ((1 << mmap_rnd_bits) - 1); +#endif else - rnd = (unsigned long)get_random_int() % (1<<28); + rnd = (unsigned long)get_random_int() & ((1 << mmap_rnd_bits) - 1); return rnd << PAGE_SHIFT; } |