[PATCH] default VM flags for upwards-growing stacks

From: Matthew Wilcox (willy@debian.org)
Date: Wed Oct 16 2002 - 13:42:38 EST

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diff -urpNX build-tools/dontdiff linus-2.5/include/linux/mm.h parisc-2.5/include/linux/mm.h
--- linus-2.5/include/linux/mm.h Tue Oct 8 10:54:13 2002
+++ parisc-2.5/include/linux/mm.h Tue Oct 8 16:49:15 2002
@@ -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 ARCH_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

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