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kernel add
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#ifndef _ELF_RANDOMIZE_H
#define _ELF_RANDOMIZE_H
struct mm_struct;
#ifndef CONFIG_ARCH_HAS_ELF_RANDOMIZE
static inline unsigned long arch_mmap_rnd(void) { return 0; }
# if defined(arch_randomize_brk) && defined(CONFIG_COMPAT_BRK)
# define compat_brk_randomized
# endif
# ifndef arch_randomize_brk
# define arch_randomize_brk(mm) (mm->brk)
# endif
#else
extern unsigned long arch_mmap_rnd(void);
extern unsigned long arch_randomize_brk(struct mm_struct *mm);
# ifdef CONFIG_COMPAT_BRK
# define compat_brk_randomized
# endif
#endif
#endif
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