binfmt_elf: switch elf_map() to vm_mmap/vm_munmap

No reason to hold ->mmap_sem over the sequence

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index e658dd134b95fb375b371a931e739baa95d249a8..1b52956afe33ab07889c3963ce2c41b32133483b 100644 (file)
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -329,7 +329,6 @@ static unsigned long elf_map(struct file *filep, unsigned long addr,
        if (!size)
                return addr;
 
-       down_write(&current->mm->mmap_sem);
        /*
        * total_size is the size of the ELF (interpreter) image.
        * The _first_ mmap needs to know the full size, otherwise
@@ -340,13 +339,12 @@ static unsigned long elf_map(struct file *filep, unsigned long addr,
        */
        if (total_size) {
                total_size = ELF_PAGEALIGN(total_size);
-               map_addr = do_mmap(filep, addr, total_size, prot, type, off);
+               map_addr = vm_mmap(filep, addr, total_size, prot, type, off);
                if (!BAD_ADDR(map_addr))
-                       do_munmap(current->mm, map_addr+size, total_size-size);
+                       vm_munmap(map_addr+size, total_size-size);
        } else
-               map_addr = do_mmap(filep, addr, size, prot, type, off);
+               map_addr = vm_mmap(filep, addr, size, prot, type, off);
 
-       up_write(&current->mm->mmap_sem);
        return(map_addr);
 }