Commit 6cd57613 authored by Derek's avatar Derek Committed by Linus Torvalds

mm/mremap.c: clean up goto just return ERR_PTR

As suggested by Kirill the "goto"s in vma_to_resize aren't necessary, just
change them to explicit return.
Signed-off-by: default avatarDerek Che <crquan@ymail.com>
Suggested-by: default avatar"Kirill A. Shutemov" <kirill@shutemov.name>
Acked-by: default avatarDavid Rientjes <rientjes@google.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 12215182
...@@ -345,25 +345,25 @@ static struct vm_area_struct *vma_to_resize(unsigned long addr, ...@@ -345,25 +345,25 @@ static struct vm_area_struct *vma_to_resize(unsigned long addr,
struct vm_area_struct *vma = find_vma(mm, addr); struct vm_area_struct *vma = find_vma(mm, addr);
if (!vma || vma->vm_start > addr) if (!vma || vma->vm_start > addr)
goto Efault; return ERR_PTR(-EFAULT);
if (is_vm_hugetlb_page(vma)) if (is_vm_hugetlb_page(vma))
goto Einval; return ERR_PTR(-EINVAL);
/* We can't remap across vm area boundaries */ /* We can't remap across vm area boundaries */
if (old_len > vma->vm_end - addr) if (old_len > vma->vm_end - addr)
goto Efault; return ERR_PTR(-EFAULT);
/* Need to be careful about a growing mapping */ /* Need to be careful about a growing mapping */
if (new_len > old_len) { if (new_len > old_len) {
unsigned long pgoff; unsigned long pgoff;
if (vma->vm_flags & (VM_DONTEXPAND | VM_PFNMAP)) if (vma->vm_flags & (VM_DONTEXPAND | VM_PFNMAP))
goto Efault; return ERR_PTR(-EFAULT);
pgoff = (addr - vma->vm_start) >> PAGE_SHIFT; pgoff = (addr - vma->vm_start) >> PAGE_SHIFT;
pgoff += vma->vm_pgoff; pgoff += vma->vm_pgoff;
if (pgoff + (new_len >> PAGE_SHIFT) < pgoff) if (pgoff + (new_len >> PAGE_SHIFT) < pgoff)
goto Einval; return ERR_PTR(-EINVAL);
} }
if (vma->vm_flags & VM_LOCKED) { if (vma->vm_flags & VM_LOCKED) {
...@@ -372,29 +372,20 @@ static struct vm_area_struct *vma_to_resize(unsigned long addr, ...@@ -372,29 +372,20 @@ static struct vm_area_struct *vma_to_resize(unsigned long addr,
lock_limit = rlimit(RLIMIT_MEMLOCK); lock_limit = rlimit(RLIMIT_MEMLOCK);
locked += new_len - old_len; locked += new_len - old_len;
if (locked > lock_limit && !capable(CAP_IPC_LOCK)) if (locked > lock_limit && !capable(CAP_IPC_LOCK))
goto Eagain; return ERR_PTR(-EAGAIN);
} }
if (!may_expand_vm(mm, (new_len - old_len) >> PAGE_SHIFT)) if (!may_expand_vm(mm, (new_len - old_len) >> PAGE_SHIFT))
goto Enomem; return ERR_PTR(-ENOMEM);
if (vma->vm_flags & VM_ACCOUNT) { if (vma->vm_flags & VM_ACCOUNT) {
unsigned long charged = (new_len - old_len) >> PAGE_SHIFT; unsigned long charged = (new_len - old_len) >> PAGE_SHIFT;
if (security_vm_enough_memory_mm(mm, charged)) if (security_vm_enough_memory_mm(mm, charged))
goto Enomem; return ERR_PTR(-ENOMEM);
*p = charged; *p = charged;
} }
return vma; return vma;
Efault: /* very odd choice for most of the cases, but... */
return ERR_PTR(-EFAULT);
Einval:
return ERR_PTR(-EINVAL);
Enomem:
return ERR_PTR(-ENOMEM);
Eagain:
return ERR_PTR(-EAGAIN);
} }
static unsigned long mremap_to(unsigned long addr, unsigned long old_len, static unsigned long mremap_to(unsigned long addr, unsigned long old_len,
......
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