Module: xenomai-head
Branch: master
Commit: 518a20952b778463ffedb88ce645b53e23058ae1
URL:
http://git.xenomai.org/?p=xenomai-head.git;a=commit;h=518a20952b778463ffedb88ce645b53e23058ae1
Author: Jan Kiszka <jan.kis...@siemens.com>
Date: Mon Nov 9 20:37:08 2009 +0100
nucleus: Track heap mapping on to mm-clone
When the mm is cloned (due to fork), the heap mapping counter need to be
updated as well. Register an open callback with the vm-ops for this
purpose.
Signed-off-by: Jan Kiszka <jan.kis...@siemens.com>
---
ksrc/nucleus/heap.c | 12 +++++++++++-
1 files changed, 11 insertions(+), 1 deletions(-)
diff --git a/ksrc/nucleus/heap.c b/ksrc/nucleus/heap.c
index b5fb1cd..27a4ad7 100644
--- a/ksrc/nucleus/heap.c
+++ b/ksrc/nucleus/heap.c
@@ -1017,6 +1017,15 @@ static void __unreserve_and_free_heap(void *ptr, size_t
size, int kmflags)
}
}
+static void xnheap_vmopen(struct vm_area_struct *vma)
+{
+ xnheap_t *heap = vma->vm_private_data;
+
+ spin_lock(&kheapq_lock);
+ heap->archdep.numaps++;
+ spin_unlock(&kheapq_lock);
+}
+
static void xnheap_vmclose(struct vm_area_struct *vma)
{
xnheap_t *heap = vma->vm_private_data;
@@ -1037,7 +1046,8 @@ static void xnheap_vmclose(struct vm_area_struct *vma)
}
static struct vm_operations_struct xnheap_vmops = {
- .close = &xnheap_vmclose
+ .open = &xnheap_vmopen,
+ .close = &xnheap_vmclose
};
static int xnheap_open(struct inode *inode, struct file *file)
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