[PATCH] shmat() and CONFIG_STACK_GROWSUP

I think this patch for the shmat() is obviously correct for our stack (which grows up).
Basically we gain a small region of 4 Pages in which shmat() may map memory.

Ok ?
If yes, should I commit or send to linux-kernel mailing list ?

Helge

diff --git a/ipc/shm.c b/ipc/shm.c
index 6d16bb6..f5cc635 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -852,6 +852,7 @@ long do_shmat(int shmid, char __user *sh
 		user_addr = ERR_PTR(-EINVAL);
 		if (find_vma_intersection(current->mm, addr, addr + size))
 			goto invalid;
+#ifndef CONFIG_STACK_GROWSUP
 		/*
 		 * If shm segment goes below stack, make sure there is some
 		 * space left for the stack to grow (at least 4 pages).
@@ -859,6 +860,7 @@ long do_shmat(int shmid, char __user *sh
 		if (addr < current->mm->start_stack &&
 		    addr > current->mm->start_stack - size - PAGE_SIZE * 5)
 			goto invalid;
+#endif
 	}
 		
 	user_addr = (void*) do_mmap (file, addr, size, prot, flags, 0);