This is a note to let you know that I've just added the patch titled
vm: convert mtdchar mmap to vm_iomap_memory() helper
to the 3.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
vm-convert-mtdchar-mmap-to-vm_iomap_memory-helper.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 8558e4a26b00225efeb085725bc319f91201b239 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Date: Fri, 19 Apr 2013 09:53:07 -0700
Subject: vm: convert mtdchar mmap to vm_iomap_memory() helper
From: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
commit 8558e4a26b00225efeb085725bc319f91201b239 upstream.
This is my example conversion of a few existing mmap users. The mtdchar
case is actually disabled right now (and stays disabled), but I did it
because it showed up on my "git grep", and I was familiar with the code
due to fixing an overflow problem in the code in commit 9c603e53d380
("mtdchar: fix offset overflow detection").
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/mtd/mtdchar.c | 32 ++------------------------------
1 file changed, 2 insertions(+), 30 deletions(-)
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -1100,45 +1100,17 @@ static int mtd_mmap(struct file *file, s
struct mtd_file_info *mfi = file->private_data;
struct mtd_info *mtd = mfi->mtd;
struct map_info *map = mtd->priv;
- resource_size_t start, off;
- unsigned long len, vma_len;
/* This is broken because it assumes the MTD device is map-based
and that mtd->priv is a valid struct map_info. It should be
replaced with something that uses the mtd_get_unmapped_area()
operation properly. */
if (0 /*mtd->type == MTD_RAM || mtd->type == MTD_ROM*/) {
- off = get_vm_offset(vma);
- start = map->phys;
- len = PAGE_ALIGN((start & ~PAGE_MASK) + map->size);
- start &= PAGE_MASK;
- vma_len = get_vm_size(vma);
-
- /* Overflow in off+len? */
- if (vma_len + off < off)
- return -EINVAL;
- /* Does it fit in the mapping? */
- if (vma_len + off > len)
- return -EINVAL;
-
- off += start;
- /* Did that overflow? */
- if (off < start)
- return -EINVAL;
- if (set_vm_offset(vma, off) < 0)
- return -EINVAL;
- vma->vm_flags |= VM_IO | VM_RESERVED;
-
#ifdef pgprot_noncached
- if (file->f_flags & O_DSYNC || off >= __pa(high_memory))
+ if (file->f_flags & O_DSYNC || map->phys >= __pa(high_memory))
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
#endif
- if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
- vma->vm_end - vma->vm_start,
- vma->vm_page_prot))
- return -EAGAIN;
-
- return 0;
+ return vm_iomap_memory(vma, map->phys, map->size);
}
return -ENOSYS;
#else
Patches currently in stable-queue which might be from torvalds@xxxxxxxxxxxxxxxxxxxx are
queue-3.0/vm-convert-snd_pcm_lib_mmap_iomem-to-vm_iomap_memory-helper.patch
queue-3.0/hugetlbfs-add-swap-entry-check-in-follow_hugetlb_page.patch
queue-3.0/kernel-signal.c-stop-info-leak-via-the-tkill-and-the-tgkill-syscalls.patch
queue-3.0/hfsplus-fix-potential-overflow-in-hfsplus_file_truncate.patch
queue-3.0/vm-convert-fb_mmap-to-vm_iomap_memory-helper.patch
queue-3.0/vm-convert-mtdchar-mmap-to-vm_iomap_memory-helper.patch
queue-3.0/vm-convert-hpet-mmap-to-vm_iomap_memory-helper.patch
queue-3.0/vm-add-vm_iomap_memory-helper-function.patch
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