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Diffstat (limited to 'mm')
-rw-r--r--mm/mmap.c16
-rw-r--r--mm/nommu.c2
2 files changed, 9 insertions, 9 deletions
diff --git a/mm/mmap.c b/mm/mmap.c
index d3d9a94ca031..de2c1769cc68 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -168,7 +168,7 @@ static struct vm_area_struct *remove_vma(struct vm_area_struct *vma)
return next;
}
-static unsigned long do_brk(unsigned long addr, unsigned long len);
+static int do_brk(unsigned long addr, unsigned long len);
SYSCALL_DEFINE1(brk, unsigned long, brk)
{
@@ -224,7 +224,7 @@ SYSCALL_DEFINE1(brk, unsigned long, brk)
goto out;
/* Ok, looks good - let it rip. */
- if (do_brk(oldbrk, newbrk-oldbrk) != oldbrk)
+ if (do_brk(oldbrk, newbrk-oldbrk) < 0)
goto out;
set_brk:
@@ -2625,7 +2625,7 @@ static inline void verify_mm_writelocked(struct mm_struct *mm)
* anonymous maps. eventually we may be able to do some
* brk-specific accounting here.
*/
-static unsigned long do_brk(unsigned long addr, unsigned long len)
+static int do_brk(unsigned long addr, unsigned long len)
{
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma, *prev;
@@ -2636,7 +2636,7 @@ static unsigned long do_brk(unsigned long addr, unsigned long len)
len = PAGE_ALIGN(len);
if (!len)
- return addr;
+ return 0;
flags = VM_DATA_DEFAULT_FLAGS | VM_ACCOUNT | mm->def_flags;
@@ -2703,13 +2703,13 @@ out:
if (flags & VM_LOCKED)
mm->locked_vm += (len >> PAGE_SHIFT);
vma->vm_flags |= VM_SOFTDIRTY;
- return addr;
+ return 0;
}
-unsigned long vm_brk(unsigned long addr, unsigned long len)
+int vm_brk(unsigned long addr, unsigned long len)
{
struct mm_struct *mm = current->mm;
- unsigned long ret;
+ int ret;
bool populate;
if (down_write_killable(&mm->mmap_sem))
@@ -2718,7 +2718,7 @@ unsigned long vm_brk(unsigned long addr, unsigned long len)
ret = do_brk(addr, len);
populate = ((mm->def_flags & VM_LOCKED) != 0);
up_write(&mm->mmap_sem);
- if (populate)
+ if (populate && !ret)
mm_populate(addr, len);
return ret;
}
diff --git a/mm/nommu.c b/mm/nommu.c
index c8bd59a03c71..c2e58880207f 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1682,7 +1682,7 @@ void exit_mmap(struct mm_struct *mm)
}
}
-unsigned long vm_brk(unsigned long addr, unsigned long len)
+int vm_brk(unsigned long addr, unsigned long len)
{
return -ENOMEM;
}