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author | Arnd Bergmann <arnd@arndb.de> | 2015-11-25 23:47:38 +0100 |
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committer | Arnd Bergmann <arnd@arndb.de> | 2015-11-25 23:47:38 +0100 |
commit | d3de94ba4e58e8043d500f7335797d6a2ac93248 (patch) | |
tree | 8382a170965eec00ebfe62e7b42dfdea9ca44f54 /arch/s390/include/asm/elf.h | |
parent | fabc2c9c1ff5376489e83e142f1ab236609435b1 (diff) | |
parent | 1ec218373b8ebda821aec00bb156a9c94fad9cd4 (diff) | |
download | linux-d3de94ba4e58e8043d500f7335797d6a2ac93248.tar.bz2 |
Merge tag 'v4.4-rc2' into fixes
Linux 4.4-rc2 is backmerged from the keystone fixes.
Diffstat (limited to 'arch/s390/include/asm/elf.h')
-rw-r--r-- | arch/s390/include/asm/elf.h | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/arch/s390/include/asm/elf.h b/arch/s390/include/asm/elf.h index 3ad48f22de78..bab6739a1154 100644 --- a/arch/s390/include/asm/elf.h +++ b/arch/s390/include/asm/elf.h @@ -206,9 +206,16 @@ do { \ } while (0) #endif /* CONFIG_COMPAT */ -extern unsigned long mmap_rnd_mask; - -#define STACK_RND_MASK (test_thread_flag(TIF_31BIT) ? 0x7ff : mmap_rnd_mask) +/* + * Cache aliasing on the latest machines calls for a mapping granularity + * of 512KB. For 64-bit processes use a 512KB alignment and a randomization + * of up to 1GB. For 31-bit processes the virtual address space is limited, + * use no alignment and limit the randomization to 8MB. + */ +#define BRK_RND_MASK (is_32bit_task() ? 0x7ffUL : 0x3ffffUL) +#define MMAP_RND_MASK (is_32bit_task() ? 0x7ffUL : 0x3ff80UL) +#define MMAP_ALIGN_MASK (is_32bit_task() ? 0 : 0x7fUL) +#define STACK_RND_MASK MMAP_RND_MASK #define ARCH_DLINFO \ do { \ |