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Open Source and information security mailing list archives
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Date: Wed, 30 Sep 2009 15:55:39 -0700 From: Jeremy Fitzhardinge <jeremy@...p.org> To: Dave Airlie <airlied@...ux.ie> CC: dri-devel <dri-devel@...ts.sourceforge.net>, Jan Beulich <JBeulich@...ell.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: [PATCH] drm: make sure page protections are updated after changing vm_flags. Some architectures compute ->vm_page_prot depending on ->vm_flags, so we need to update the protections after adjusting the flags. Reported-by: Jan Beulich <JBeulich@...ell.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com> diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c index 8104eca..9d3e39f 100644 --- a/drivers/gpu/drm/drm_gem.c +++ b/drivers/gpu/drm/drm_gem.c @@ -537,7 +537,7 @@ int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma) vma->vm_ops = obj->dev->driver->gem_vm_ops; vma->vm_private_data = map->handle; /* FIXME: use pgprot_writecombine when available */ - vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); + vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); /* Take a ref for this mapping of the object, so that the fault * handler can dereference the mmap offset's pointer to the object. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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