Module: xenomai-head
Branch: master
Commit: 8686392248f34fbc3a6ee8e9b5a93964cdeaa580
URL:
http://git.xenomai.org/?p=xenomai-head.git;a=commit;h=8686392248f34fbc3a6ee8e9b5a93964cdeaa580
Author: Gilles Chanteperdrix <gilles.chanteperd...@xenomai.org>
Date: Thu Aug 25 21:44:10 2011 +0200
arm: do not simulate write fault
when faulting a PROT_NONE, or PROT_READ only mapping.
---
ksrc/arch/arm/hal.c | 8 ++++++--
1 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/ksrc/arch/arm/hal.c b/ksrc/arch/arm/hal.c
index 4794c4c..6b2c30a 100644
--- a/ksrc/arch/arm/hal.c
+++ b/ksrc/arch/arm/hal.c
@@ -430,8 +430,12 @@ int rthal_irq_end(unsigned int irq)
void __rthal_arm_fault_range(struct vm_area_struct *vma)
{
unsigned long addr;
- for (addr = vma->vm_start; addr != vma->vm_end; addr += PAGE_SIZE)
- handle_mm_fault(vma->vm_mm, vma, addr, 1);
+
+ if ((vma->vm_flags & VM_MAYREAD))
+ for (addr = vma->vm_start;
+ addr != vma->vm_end; addr += PAGE_SIZE)
+ handle_mm_fault(vma->vm_mm, vma, addr,
+ vma->vm_flags & VM_MAYWRITE);
}
static inline int do_exception_event(unsigned event, unsigned domid, void
*data)
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