diff options
| author |   Jiri Slaby <jslaby@suse.cz> | 2010-01-08 00:03:26 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2010-01-08 00:03:26 -0800 |
| commit | 76704fb56c7317ae02c3267fc31d215f3a2528ca (patch) | |
| tree | 9175710b17e36663ef32f49ad990d894ca9d1491 | |
| parent | sparc: copy_from_user() should not return -EFAULT (diff) | |
| download | linux-dev-76704fb56c7317ae02c3267fc31d215f3a2528ca.tar.xz linux-dev-76704fb56c7317ae02c3267fc31d215f3a2528ca.zip | |
SPARC: use helpers for rlimits
Make sure compiler won't do weird things with limits. E.g. fetching
them twice may return 2 different values after writable limits are
implemented.
I.e. either use rlimit helpers added in
3e10e716abf3c71bdb5d86b8f507f9e72236c9cd
or ACCESS_ONCE if not applicable.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | arch/sparc/kernel/sys_sparc_64.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/sparc/kernel/sys_sparc_64.c b/arch/sparc/kernel/sys_sparc_64.c index cfa0e19abe3b..d77f54316948 100644 --- a/arch/sparc/kernel/sys_sparc_64.c +++ b/arch/sparc/kernel/sys_sparc_64.c @@ -365,6 +365,7 @@ EXPORT_SYMBOL(get_fb_unmapped_area); void arch_pick_mmap_layout(struct mm_struct *mm) { unsigned long random_factor = 0UL; + unsigned long gap; if (current->flags & PF_RANDOMIZE) { random_factor = get_random_int(); @@ -379,9 +380,10 @@ void arch_pick_mmap_layout(struct mm_struct *mm) * Fall back to the standard layout if the personality * bit is set, or if the expected stack growth is unlimited: */ + gap = rlimit(RLIMIT_STACK); if (!test_thread_flag(TIF_32BIT) || (current->personality & ADDR_COMPAT_LAYOUT) || - current->signal->rlim[RLIMIT_STACK].rlim_cur == RLIM_INFINITY || + gap == RLIM_INFINITY || sysctl_legacy_va_layout) { mm->mmap_base = TASK_UNMAPPED_BASE + random_factor; mm->get_unmapped_area = arch_get_unmapped_area; @@ -389,9 +391,7 @@ void arch_pick_mmap_layout(struct mm_struct *mm) } else { /* We know it's 32-bit */ unsigned long task_size = STACK_TOP32; - unsigned long gap; - gap = current->signal->rlim[RLIMIT_STACK].rlim_cur; if (gap < 128 * 1024 * 1024) gap = 128 * 1024 * 1024; if (gap > (task_size / 6 * 5)) |