fs: introduce f_op->mmap_capabilities for nommu mmap support

[uclinux-h8/linux.git] / security / security.c

diff --git a/security/security.c b/security/security.c
index 18b35c6..a0442b2 100644 (file)
--- a/security/security.c
+++ b/security/security.c
@@ -726,16 +726,15 @@ static inline unsigned long mmap_prot(struct file *file, unsigned long prot)
                return prot | PROT_EXEC;
        /*
         * ditto if it's not on noexec mount, except that on !MMU we need
-        * BDI_CAP_EXEC_MMAP (== VM_MAYEXEC) in this case
+        * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case
         */
        if (!(file->f_path.mnt->mnt_flags & MNT_NOEXEC)) {
 #ifndef CONFIG_MMU
-               unsigned long caps = 0;
-               struct address_space *mapping = file->f_mapping;
-               if (mapping && mapping->backing_dev_info)
-                       caps = mapping->backing_dev_info->capabilities;
-               if (!(caps & BDI_CAP_EXEC_MAP))
-                       return prot;
+               if (file->f_op->mmap_capabilities) {
+                       unsigned caps = file->f_op->mmap_capabilities(file);
+                       if (!(caps & NOMMU_MAP_EXEC))
+                               return prot;
+               }
 #endif
                return prot | PROT_EXEC;
        }