mm: reuse unused swap entry if necessary

[karo-tx-linux.git] / mm / mmap.c

diff --git a/mm/mmap.c b/mm/mmap.c
index 6451ce2854b9f671bff0f3befe6a537807d3c5c6..34579b23ebd55ebed1a99a5473c6ca0693b559e2 100644 (file)
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -88,6 +88,9 @@ int sysctl_overcommit_ratio = 50;     /* default is 50% */
 int sysctl_max_map_count __read_mostly = DEFAULT_MAX_MAP_COUNT;
 struct percpu_counter vm_committed_as;
 
+/* amount of vm to protect from userspace access */
+unsigned long mmap_min_addr = CONFIG_DEFAULT_MMAP_MIN_ADDR;
+
 /*
  * Check that a process has enough memory to allocate a new virtual
  * mapping. 0 means there is enough memory for the allocation to
@@ -1220,8 +1223,7 @@ munmap_back:
        if (correct_wcount)
                atomic_inc(&inode->i_writecount);
 out:
-       if (vm_flags & VM_EXEC)
-               perf_counter_mmap(addr, len, pgoff, file);
+       perf_counter_mmap(vma);
 
        mm->total_vm += len >> PAGE_SHIFT;
        vm_stat_account(mm, vm_flags, file, len >> PAGE_SHIFT);
@@ -2309,6 +2311,8 @@ int install_special_mapping(struct mm_struct *mm,
 
        mm->total_vm += len >> PAGE_SHIFT;
 
+       perf_counter_mmap(vma);
+
        return 0;
 }