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Diffstat (limited to 'mm/nommu.c')
-rw-r--r--mm/nommu.c41
1 files changed, 36 insertions, 5 deletions
diff --git a/mm/nommu.c b/mm/nommu.c
index f59e170fceb4..bb8f4f004a82 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1233,7 +1233,7 @@ enomem:
/*
* handle mapping creation for uClinux
*/
-unsigned long do_mmap_pgoff(struct file *file,
+static unsigned long do_mmap_pgoff(struct file *file,
unsigned long addr,
unsigned long len,
unsigned long prot,
@@ -1470,7 +1470,32 @@ error_getting_region:
show_free_areas(0);
return -ENOMEM;
}
-EXPORT_SYMBOL(do_mmap_pgoff);
+
+unsigned long do_mmap(struct file *file, unsigned long addr,
+ unsigned long len, unsigned long prot,
+ unsigned long flag, unsigned long offset)
+{
+ if (unlikely(offset + PAGE_ALIGN(len) < offset))
+ return -EINVAL;
+ if (unlikely(offset & ~PAGE_MASK))
+ return -EINVAL;
+ return do_mmap_pgoff(file, addr, len, prot, flag, offset >> PAGE_SHIFT);
+}
+EXPORT_SYMBOL(do_mmap);
+
+unsigned long vm_mmap(struct file *file, unsigned long addr,
+ unsigned long len, unsigned long prot,
+ unsigned long flag, unsigned long offset)
+{
+ unsigned long ret;
+ struct mm_struct *mm = current->mm;
+
+ down_write(&mm->mmap_sem);
+ ret = do_mmap(file, addr, len, prot, flag, offset);
+ up_write(&mm->mmap_sem);
+ return ret;
+}
+EXPORT_SYMBOL(vm_mmap);
SYSCALL_DEFINE6(mmap_pgoff, unsigned long, addr, unsigned long, len,
unsigned long, prot, unsigned long, flags,
@@ -1709,16 +1734,22 @@ erase_whole_vma:
}
EXPORT_SYMBOL(do_munmap);
-SYSCALL_DEFINE2(munmap, unsigned long, addr, size_t, len)
+int vm_munmap(unsigned long addr, size_t len)
{
- int ret;
struct mm_struct *mm = current->mm;
+ int ret;
down_write(&mm->mmap_sem);
ret = do_munmap(mm, addr, len);
up_write(&mm->mmap_sem);
return ret;
}
+EXPORT_SYMBOL(vm_munmap);
+
+SYSCALL_DEFINE2(munmap, unsigned long, addr, size_t, len)
+{
+ return vm_munmap(addr, len);
+}
/*
* release all the mappings made in a process's VM space
@@ -1744,7 +1775,7 @@ void exit_mmap(struct mm_struct *mm)
kleave("");
}
-unsigned long do_brk(unsigned long addr, unsigned long len)
+unsigned long vm_brk(unsigned long addr, unsigned long len)
{
return -ENOMEM;
}