[PATCH] CONFIG_STACK_GROWSUP

Change ARCH_STACK_GROWSUP to CONFIG_STACK_GROWSUP as requested.

arch/parisc/Kconfig

@@ -22,6 +22,10 @@ config SWAP
 	bool
 	default y
 
+config STACK_GROWSUP
+	bool
+	default y
+
 config UID16
 	bool
 

fs/binfmt_elf.c

@@ -109,7 +109,7 @@ static void padzero(unsigned long elf_bss)
 }
 
 /* Let's use some macros to make this stack manipulation a litle clearer */
-#ifdef ARCH_STACK_GROWSUP
+#ifdef CONFIG_STACK_GROWSUP
 #define STACK_ADD(sp, items) ((elf_addr_t *)(sp) + (items))
 #define STACK_ROUND(sp, items) \
 	((15 + (unsigned long) ((sp) + (items))) &~ 15UL)
@@ -207,7 +207,7 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr * exec,
 	bprm->p = STACK_ROUND(sp, items);
 
 	/* Point sp at the lowest address on the stack */
-#ifdef ARCH_STACK_GROWSUP
+#ifdef CONFIG_STACK_GROWSUP
 	sp = (elf_addr_t *)bprm->p - items - ei_index;
 	bprm->exec = (unsigned long) sp; /* XXX: PARISC HACK */
 #else

fs/exec.c

@@ -331,7 +331,7 @@ int setup_arg_pages(struct linux_binprm *bprm)
 	struct mm_struct *mm = current->mm;
 	int i;
 
-#ifdef ARCH_STACK_GROWSUP
+#ifdef CONFIG_STACK_GROWSUP
 	/* Move the argument and environment strings to the bottom of the
 	 * stack space.
 	 */
@@ -390,7 +390,7 @@ int setup_arg_pages(struct linux_binprm *bprm)
 	down_write(&mm->mmap_sem);
 	{
 		mpnt->vm_mm = mm;
-#ifdef ARCH_STACK_GROWSUP
+#ifdef CONFIG_STACK_GROWSUP
 		mpnt->vm_start = stack_base;
 		mpnt->vm_end = PAGE_MASK &
 			(PAGE_SIZE - 1 + (unsigned long) bprm->p);

include/asm-parisc/pgtable.h

@@ -13,8 +13,6 @@
 #include <asm/cache.h>
 #include <asm/bitops.h>
 
-#define ARCH_STACK_GROWSUP
-
 /*
  * kern_addr_valid(ADDR) tests if ADDR is pointing to valid kernel
  * memory.  For the return value to be meaningful, ADDR must be >=

include/linux/mm.h

@@ -106,7 +106,11 @@ struct vm_area_struct {
 #define VM_ACCOUNT	0x00100000	/* Is a VM accounted object */
 #define VM_HUGETLB	0x00400000	/* Huge TLB Page VM */
 
-#define VM_STACK_FLAGS	(0x00000100 | VM_DATA_DEFAULT_FLAGS | VM_ACCOUNT)
+#ifdef CONFIG_STACK_GROWSUP
+#define VM_STACK_FLAGS	(VM_GROWSUP | VM_DATA_DEFAULT_FLAGS | VM_ACCOUNT)
+#else
+#define VM_STACK_FLAGS	(VM_GROWSDOWN | VM_DATA_DEFAULT_FLAGS | VM_ACCOUNT)
+#endif
 
 #define VM_READHINTMASK			(VM_SEQ_READ | VM_RAND_READ)
 #define VM_ClearReadHint(v)		(v)->vm_flags &= ~VM_READHINTMASK

mm/mmap.c

@@ -767,7 +767,7 @@ struct vm_area_struct * find_vma_prev(struct mm_struct * mm, unsigned long addr,
 	return prev ? prev->vm_next : vma;
 }
 
-#ifdef ARCH_STACK_GROWSUP
+#ifdef CONFIG_STACK_GROWSUP
 /*
  * vma is the first one with address > vma->vm_end.  Have to extend vma.
  */