From 5a5e4c2eca0307deeb438c97dbdc608663515c0a Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Wed, 30 May 2012 01:49:38 -0400
Subject: [PATCH] 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>
---
fs/binfmt_elf.c | 8 +++-----
1 file 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(¤t->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(¤t->mm->mmap_sem);
return(map_addr);
}