Revert "Ignore madvise(MADV_WILLNEED) for hugetlbfs-backed regions"

[safe/jmp/linux-2.6] / mm / mmap.c

diff --git a/mm/mmap.c b/mm/mmap.c
index 00ced3e..6b7b1a9 100644 (file)
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -20,6 +20,7 @@
 #include <linux/fs.h>
 #include <linux/personality.h>
 #include <linux/security.h>
+#include <linux/ima.h>
 #include <linux/hugetlb.h>
 #include <linux/profile.h>
 #include <linux/module.h>
@@ -84,7 +85,7 @@ EXPORT_SYMBOL(vm_get_page_prot);
 int sysctl_overcommit_memory = OVERCOMMIT_GUESS;  /* heuristic overcommit */
 int sysctl_overcommit_ratio = 50;      /* default is 50% */
 int sysctl_max_map_count __read_mostly = DEFAULT_MAX_MAP_COUNT;
-atomic_long_t vm_committed_space = ATOMIC_LONG_INIT(0);
+struct percpu_counter vm_committed_as;
 
 /*
  * Check that a process has enough memory to allocate a new virtual
@@ -178,11 +179,7 @@ int __vm_enough_memory(struct mm_struct *mm, long pages, int cap_sys_admin)
        if (mm)
                allowed -= mm->total_vm / 32;
 
-       /*
-        * cast `allowed' as a signed long because vm_committed_space
-        * sometimes has a negative value
-        */
-       if (atomic_long_read(&vm_committed_space) < (long)allowed)
+       if (percpu_counter_read_positive(&vm_committed_as) < allowed)
                return 0;
 error:
        vm_unacct_memory(pages);
@@ -1049,6 +1046,9 @@ unsigned long do_mmap_pgoff(struct file *file, unsigned long addr,
        error = security_file_mmap(file, reqprot, prot, flags, addr, 0);
        if (error)
                return error;
+       error = ima_file_mmap(file, prot);
+       if (error)
+               return error;
 
        return mmap_region(file, addr, len, flags, vm_flags, pgoff);
 }
@@ -1571,7 +1571,7 @@ static int acct_stack_growth(struct vm_area_struct *vma, unsigned long size, uns
         * Overcommit..  This must be the final test, as it will
         * update security statistics.
         */
-       if (security_vm_enough_memory(grow))
+       if (security_vm_enough_memory_mm(mm, grow))
                return -ENOMEM;
 
        /* Ok, everything looks good - let it rip */
@@ -2477,7 +2477,8 @@ void mm_drop_all_locks(struct mm_struct *mm)
  */
 void __init mmap_init(void)
 {
-       vm_area_cachep = kmem_cache_create("vm_area_struct",
-                       sizeof(struct vm_area_struct), 0,
-                       SLAB_PANIC, NULL);
+       int ret;
+
+       ret = percpu_counter_init(&vm_committed_as, 0);
+       VM_BUG_ON(ret);
 }