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Viewing changes to arch/sparc/kernel/sys_sparc_64.c

  • Committer: Bazaar Package Importer
  • Author(s): Paolo Pisati
  • Date: 2011-06-29 15:23:51 UTC
  • mfrom: (26.1.1 natty-proposed)
  • Revision ID: james.westby@ubuntu.com-20110629152351-xs96tm303d95rpbk
Tags: 3.0.0-1200.2
* Rebased against 3.0.0-6.7
* BSP from TI based on 3.0.0

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arch/sparc/kernel/sys_sparc_64.c
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}
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EXPORT_SYMBOL(get_fb_unmapped_area);
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/* Essentially the same as PowerPC... */
 
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/* Essentially the same as PowerPC.  */
 
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static unsigned long mmap_rnd(void)
 
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{
 
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        unsigned long rnd = 0UL;
 
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        if (current->flags & PF_RANDOMIZE) {
 
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                unsigned long val = get_random_int();
 
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                if (test_thread_flag(TIF_32BIT))
 
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                        rnd = (val % (1UL << (22UL-PAGE_SHIFT)));
 
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                else
 
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                        rnd = (val % (1UL << (29UL-PAGE_SHIFT)));
 
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        }
 
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        return (rnd << PAGE_SHIFT) * 2;
 
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}
 
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void arch_pick_mmap_layout(struct mm_struct *mm)
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{
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        unsigned long random_factor = 0UL;
 
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        unsigned long random_factor = mmap_rnd();
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        unsigned long gap;
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        if (current->flags & PF_RANDOMIZE) {
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                random_factor = get_random_int();
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                if (test_thread_flag(TIF_32BIT))
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                        random_factor &= ((1 * 1024 * 1024) - 1);
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                else
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                        random_factor = ((random_factor << PAGE_SHIFT) &
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                                         0xffffffffUL);
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        }
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        /*
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         * Fall back to the standard layout if the personality
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         * bit is set, or if the expected stack growth is unlimited:
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                default:
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                        err = -ENOSYS;
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                        goto out;
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                };
 
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                }
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        }
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        if (call <= MSGCTL) {
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                switch (call) {
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                default:
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                        err = -ENOSYS;
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                        goto out;
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                };
 
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                }
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        }
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        if (call <= SHMCTL) {
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                switch (call) {
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                default:
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                        err = -ENOSYS;
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                        goto out;
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                };
 
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                }
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        } else {
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                err = -ENOSYS;
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        }