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>
kgugala · Dec 11, 2009 · 570dcf2 · 570dcf2
1 parent 2ea1d13
commit 570dcf2
Showing 1 changed file with 0 additions and 5 deletions.
diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c
@@ -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)