mm: change anon_vma linking to fix multi-process server scalability issue

[cascardo/linux.git] / include / linux / mm.h

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 8e580c0..8e2841a 100644 (file)
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -97,7 +97,11 @@ extern unsigned int kobjsize(const void *objp);
 #define VM_NORESERVE   0x00200000      /* should the VM suppress accounting */
 #define VM_HUGETLB     0x00400000      /* Huge TLB Page VM */
 #define VM_NONLINEAR   0x00800000      /* Is non-linear (remap_file_pages) */
+#ifdef CONFIG_MMU
+#define VM_LOCK_RMAP   0x01000000      /* Do not follow this rmap (mmu mmap) */
+#else
 #define VM_MAPPED_COPY 0x01000000      /* T if mapped copy of data (nommu mmap) */
+#endif
 #define VM_INSERTPAGE  0x02000000      /* The vma has had "vm_insert_page()" done on it */
 #define VM_ALWAYSDUMP  0x04000000      /* Always include in core dumps */
 
@@ -1216,7 +1220,7 @@ static inline void vma_nonlinear_insert(struct vm_area_struct *vma,
 
 /* mmap.c */
 extern int __vm_enough_memory(struct mm_struct *mm, long pages, int cap_sys_admin);
-extern void vma_adjust(struct vm_area_struct *vma, unsigned long start,
+extern int vma_adjust(struct vm_area_struct *vma, unsigned long start,
        unsigned long end, pgoff_t pgoff, struct vm_area_struct *insert);
 extern struct vm_area_struct *vma_merge(struct mm_struct *,
        struct vm_area_struct *prev, unsigned long addr, unsigned long end,