Hi Andrew,
nommu configurations will not compile because the "mm" variable does not
exist. Replace usage of the mm variable and the empty vma->vm_mm field
with correct mm pointers.
Signed-off-by: Matt Helsley <matthltc@us.ibm.com>
Cc: Mike Frysinger <vapier.adi@gmail.com>
---
Needs testing on a nommu system. I am working on getting an emulated nommu
environment built but it is not coming together quickly.
mm/nommu.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
Index: linux-2.6.24-mm1/mm/nommu.c
===================================================================
--- linux-2.6.24-mm1.orig/mm/nommu.c
+++ linux-2.6.24-mm1/mm/nommu.c
@@ -962,12 +962,14 @@ unsigned long do_mmap_pgoff(struct file
INIT_LIST_HEAD(&vma->anon_vma_node);
atomic_set(&vma->vm_usage, 1);
if (file) {
get_file(file);
- if (vm_flags & VM_EXECUTABLE)
- added_exe_file_vma(mm);
+ if (vm_flags & VM_EXECUTABLE) {
+ added_exe_file_vma(current->mm);
+ vma->vm_mm = current->mm;
+ }
}
vma->vm_file = file;
vma->vm_flags = vm_flags;
vma->vm_start = addr;
vma->vm_end = addr + len;
@@ -1053,11 +1055,11 @@ unsigned long do_mmap_pgoff(struct file
EXPORT_SYMBOL(do_mmap_pgoff);
/*
* handle mapping disposal for uClinux
*/
-static void put_vma(struct vm_area_struct *vma)
+static void put_vma(struct mm_struct *mm, struct vm_area_struct *vma)
{
if (vma) {
down_write(&nommu_vma_sem);
if (atomic_dec_and_test(&vma->vm_usage)) {
@@ -1078,11 +1080,11 @@ static void put_vma(struct vm_area_struc
askedalloc -= sizeof(*vma);
if (vma->vm_file) {
fput(vma->vm_file);
if (vma->vm_flags & VM_EXECUTABLE)
- removed_exe_file_vma(vma->vm_mm);
+ removed_exe_file_vma(mm);
}
kfree(vma);
}
up_write(&nommu_vma_sem);
@@ -1116,11 +1118,11 @@ int do_munmap(struct mm_struct *mm, unsi
return -EINVAL;
found:
vml = *parent;
- put_vma(vml->vma);
+ put_vma(mm, vml->vma);
*parent = vml->next;
realalloc -= kobjsize(vml);
askedalloc -= sizeof(*vml);
kfree(vml);
@@ -1161,11 +1163,11 @@ void exit_mmap(struct mm_struct * mm)
mm->total_vm = 0;
while ((tmp = mm->context.vmlist)) {
mm->context.vmlist = tmp->next;
- put_vma(tmp->vma);
+ put_vma(mm, tmp->vma);
realalloc -= kobjsize(tmp);
askedalloc -= sizeof(*tmp);
kfree(tmp);
}
--
