On Sun, 2007-11-11 at 20:49 +0100, Peter Zijlstra wrote: > Right, which gets us into all kinds of trouble because some sites need > mmap_sem to resolve some races, notably s390 31-bit and shm.
You are refering to the mmap_sem use in compat_linux.c:do_mmap2, aren't you? That check for adresses > 2GB after the call to do_mmap_pgoff can be removed since arch_get_unmapped_area already checks against TASK_SIZE. The result of the do_mmap_pgoff call will never be out of range. This check is a left-over from the early days of the s390 compat code. -- blue skies, Martin. "Reality continues to ruin my life." - Calvin. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
