[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20210412080611.835675015@infradead.org>
Date: Mon, 12 Apr 2021 10:00:17 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: akpm@...ux-foundation.org
Cc: linux-kernel@...r.kernel.org, peterz@...radead.org,
boris.ostrovsky@...cle.com, jgross@...e.com,
sstabellini@...nel.org, x86@...nel.org,
jani.nikula@...ux.intel.com, joonas.lahtinen@...ux.intel.com,
rodrigo.vivi@...el.com, chris@...is-wilson.co.uk,
intel-gfx@...ts.freedesktop.org, linux-mm@...ck.org,
keescook@...omium.org, hch@....de
Subject: [PATCH 5/7] xen/privcmd: Use verify_page_range()
Avoid using apply_to_page_range() from modules, use the safer
verify_page_range() instead.
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
---
drivers/xen/privcmd.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/drivers/xen/privcmd.c
+++ b/drivers/xen/privcmd.c
@@ -946,9 +946,9 @@ static int privcmd_mmap(struct file *fil
* on a per pfn/pte basis. Mapping calls that fail with ENOENT
* can be then retried until success.
*/
-static int is_mapped_fn(pte_t *pte, unsigned long addr, void *data)
+static int is_mapped_fn(pte_t pte, unsigned long addr, void *data)
{
- return pte_none(*pte) ? 0 : -EBUSY;
+ return pte_none(pte) ? 0 : -EBUSY;
}
static int privcmd_vma_range_is_mapped(
@@ -956,8 +956,8 @@ static int privcmd_vma_range_is_mapped(
unsigned long addr,
unsigned long nr_pages)
{
- return apply_to_page_range(vma->vm_mm, addr, nr_pages << PAGE_SHIFT,
- is_mapped_fn, NULL) != 0;
+ return verify_page_range(vma->vm_mm, addr, nr_pages << PAGE_SHIFT,
+ is_mapped_fn, NULL) != 0;
}
const struct file_operations xen_privcmd_fops = {
Powered by blists - more mailing lists