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>

1 files changed, 3 insertions, 5 deletions

diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index e658dd134b95..1b52956afe33 100644
--- 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);
 }