[PATCH] Profiling: require buffer allocation on the correct node

[pandora-kernel.git] / mm / mmap.c

diff --git a/mm/mmap.c b/mm/mmap.c
index c7ed061..8507ee9 100644 (file)
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -30,6 +30,10 @@
 #include <asm/cacheflush.h>
 #include <asm/tlb.h>
 
+#ifndef arch_mmap_check
+#define arch_mmap_check(addr, len, flags)      (0)
+#endif
+
 static void unmap_region(struct mm_struct *mm,
                struct vm_area_struct *vma, struct vm_area_struct *prev,
                unsigned long start, unsigned long end);
@@ -920,6 +924,10 @@ unsigned long do_mmap_pgoff(struct file * file, unsigned long addr,
        if (!len)
                return -EINVAL;
 
+       error = arch_mmap_check(addr, len, flags);
+       if (error)
+               return error;
+
        /* Careful about overflows.. */
        len = PAGE_ALIGN(len);
        if (!len || len > TASK_SIZE)
@@ -1097,12 +1105,6 @@ munmap_back:
                        goto free_vma;
        }
 
-       /* Don't make the VMA automatically writable if it's shared, but the
-        * backer wishes to know when pages are first written to */
-       if (vma->vm_ops && vma->vm_ops->page_mkwrite)
-               vma->vm_page_prot =
-                       protection_map[vm_flags & (VM_READ|VM_WRITE|VM_EXEC)];
-
        /* We set VM_ACCOUNT in a shared mapping's vm_flags, to inform
         * shmem_zero_setup (perhaps called through /dev/zero's ->mmap)
         * that memory reservation must be checked; but that reservation
@@ -1120,6 +1122,10 @@ munmap_back:
        pgoff = vma->vm_pgoff;
        vm_flags = vma->vm_flags;
 
+       if (vma_wants_writenotify(vma))
+               vma->vm_page_prot =
+                       protection_map[vm_flags & (VM_READ|VM_WRITE|VM_EXEC)];
+
        if (!file || !vma_merge(mm, prev, addr, vma->vm_end,
                        vma->vm_flags, NULL, file, pgoff, vma_policy(vma))) {
                file = vma->vm_file;
@@ -1866,6 +1872,7 @@ unsigned long do_brk(unsigned long addr, unsigned long len)
        unsigned long flags;
        struct rb_node ** rb_link, * rb_parent;
        pgoff_t pgoff = addr >> PAGE_SHIFT;
+       int error;
 
        len = PAGE_ALIGN(len);
        if (!len)
@@ -1874,6 +1881,12 @@ unsigned long do_brk(unsigned long addr, unsigned long len)
        if ((addr + len) > TASK_SIZE || (addr + len) < addr)
                return -EINVAL;
 
+       flags = VM_DATA_DEFAULT_FLAGS | VM_ACCOUNT | mm->def_flags;
+
+       error = arch_mmap_check(addr, len, flags);
+       if (error)
+               return error;
+
        /*
         * mlock MCL_FUTURE?
         */
@@ -1914,8 +1927,6 @@ unsigned long do_brk(unsigned long addr, unsigned long len)
        if (security_vm_enough_memory(len >> PAGE_SHIFT))
                return -ENOMEM;
 
-       flags = VM_DATA_DEFAULT_FLAGS | VM_ACCOUNT | mm->def_flags;
-
        /* Can we just expand an old private anonymous mapping? */
        if (vma_merge(mm, prev, addr, addr + len, flags,
                                        NULL, NULL, pgoff, NULL))