Merge branch 'drm-next-4.7' of git://people.freedesktop.org/~agd5f/linux into drm...

[deliverable/linux.git] / mm / mmap.c

diff --git a/mm/mmap.c b/mm/mmap.c
index b9274a0c82c936c27a0cafc5d4b3bf4f99ac2ec5..d3d9a94ca03119919bc36629c6656b43cf6db44d 100644 (file)
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -178,7 +178,8 @@ SYSCALL_DEFINE1(brk, unsigned long, brk)
        unsigned long min_brk;
        bool populate;
 
-       down_write(&mm->mmap_sem);
+       if (down_write_killable(&mm->mmap_sem))
+               return -EINTR;
 
 #ifdef CONFIG_COMPAT_BRK
        /*
@@ -2493,7 +2494,9 @@ int vm_munmap(unsigned long start, size_t len)
        int ret;
        struct mm_struct *mm = current->mm;
 
-       down_write(&mm->mmap_sem);
+       if (down_write_killable(&mm->mmap_sem))
+               return -EINTR;
+
        ret = do_munmap(mm, start, len);
        up_write(&mm->mmap_sem);
        return ret;
@@ -2502,8 +2505,15 @@ EXPORT_SYMBOL(vm_munmap);
 
 SYSCALL_DEFINE2(munmap, unsigned long, addr, size_t, len)
 {
+       int ret;
+       struct mm_struct *mm = current->mm;
+
        profile_munmap(addr);
-       return vm_munmap(addr, len);
+       if (down_write_killable(&mm->mmap_sem))
+               return -EINTR;
+       ret = do_munmap(mm, addr, len);
+       up_write(&mm->mmap_sem);
+       return ret;
 }
 
 
@@ -2535,7 +2545,9 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
        if (pgoff + (size >> PAGE_SHIFT) < pgoff)
                return ret;
 
-       down_write(&mm->mmap_sem);
+       if (down_write_killable(&mm->mmap_sem))
+               return -EINTR;
+
        vma = find_vma(mm, start);
 
        if (!vma || !(vma->vm_flags & VM_SHARED))
@@ -2700,7 +2712,9 @@ unsigned long vm_brk(unsigned long addr, unsigned long len)
        unsigned long ret;
        bool populate;
 
-       down_write(&mm->mmap_sem);
+       if (down_write_killable(&mm->mmap_sem))
+               return -EINTR;
+
        ret = do_brk(addr, len);
        populate = ((mm->def_flags & VM_LOCKED) != 0);
        up_write(&mm->mmap_sem);