Commit 570dcf2c authored Nov 30, 2009 by Al Viro

Kill ancient crap in s390 compat mmap



We've had TASK_SIZE set to 1<<31 for 31bit tasks since May 2004.
Before that old32_mmap() had to deal with do_mmap_pgoff() giving
it an address out of range.  It had tried to do that by checking
return value and doing do_munmap() (at wrong address, BTW).

IOW, that code had been dead for 5.5 years (and bogus - for 8).
Kill.

Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

parent 2ea1d13f

arch/s390/kernel/compat_linux.c

+0 −5

Original line number	Diff line number	Diff line
		@@ -642,11 +642,6 @@ static inline long do_mmap2(

		down_write(&current->mm->mmap_sem);
		error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
		if (!IS_ERR((void *) error) && error + len >= 0x80000000ULL) {
		/* Result is out of bounds. */
		do_munmap(current->mm, addr, len);
		error = -ENOMEM;
		}
		up_write(&current->mm->mmap_sem);

		if (file)