[087/126] vm: convert HPET mmap to vm_iomap_memory() helper

Steven Rostedt
2013-05-07T04:35:54Z

[-- Attachment #1: 0087-vm-convert-HPET-mmap-to-vm_iomap_memory-helper.patch --]
[-- Type: text/plain, Size: 1538 bytes --]

3.6.11.3 stable review patch.
If anyone has any objections, please let me know.

------------------

From: Linus Torvalds <torvalds@linux-foundation.org>

[ Upstream commit 2323036dfec8ce3ce6e1c86a49a31b039f3300d1 ]

This is my example conversion of a few existing mmap users. The HPET
case is simple, widely available, and easy to test (Clemens Ladisch sent
a trivial test-program for it).

Test-program-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
drivers/char/hpet.c | 14 +-------------
1 file changed, 1 insertion(+), 13 deletions(-)

diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index dfd7876..0ff5c2e 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -373,26 +373,14 @@ static int hpet_mmap(struct file *file, struct vm_area_struct *vma)
struct hpet_dev *devp;
unsigned long addr;

- if (((vma->vm_end - vma->vm_start) != PAGE_SIZE) || vma->vm_pgoff)
- return -EINVAL;
-
devp = file->private_data;
addr = devp->hd_hpets->hp_hpet_phys;

if (addr & (PAGE_SIZE - 1))
return -ENOSYS;

- vma->vm_flags |= VM_IO;
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-
- if (io_remap_pfn_range(vma, vma->vm_start, addr >> PAGE_SHIFT,
- PAGE_SIZE, vma->vm_page_prot)) {
- printk(KERN_ERR "%s: io_remap_pfn_range failed\n",
- __func__);
- return -EAGAIN;
- }
-
- return 0;
+ return vm_iomap_memory(vma, addr, PAGE_SIZE);
#else
return -ENOSYS;
#endif
--
1.7.10.4