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| author | Jared Hulbert <jaredeh@gmail.com> | 2008-04-28 02:13:02 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-28 08:58:23 -0700 |
| commit | 30afcb4bd2762fa4b87b17ada9500aa46dc10b1b (patch) | |
| tree | 0920f491a37683a8784c146270b98f82a7e0aa2c /include | |
| parent | 423bad600443c590f34ed7ce357591f76f48f137 (diff) | |
| download | linux-30afcb4bd2762fa4b87b17ada9500aa46dc10b1b.tar.gz linux-30afcb4bd2762fa4b87b17ada9500aa46dc10b1b.tar.bz2 linux-30afcb4bd2762fa4b87b17ada9500aa46dc10b1b.zip | |
return pfn from direct_access, for XIP
Alter the block device ->direct_access() API to work with the new
get_xip_mem() API (that requires both kaddr and pfn are returned).
Some architectures will not do the right thing in their virt_to_page() for use
by XIP (to translate from the kernel virtual address returned by
direct_access(), to a user mappable pfn in XIP's page fault handler.
However, we can't switch it to just return the pfn and not the kaddr, because
we have no good way to get a kva from a pfn, and XIP requires the kva for its
read(2) and write(2) handlers. So we have to return both.
Signed-off-by: Jared Hulbert <jaredeh@gmail.com>
Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Carsten Otte <cotte@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: linux-mm@kvack.org
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/fs.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index d6d7c52055c6..bd05f5678045 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1178,7 +1178,8 @@ struct block_device_operations { int (*ioctl) (struct inode *, struct file *, unsigned, unsigned long); long (*unlocked_ioctl) (struct file *, unsigned, unsigned long); long (*compat_ioctl) (struct file *, unsigned, unsigned long); - int (*direct_access) (struct block_device *, sector_t, unsigned long *); + int (*direct_access) (struct block_device *, sector_t, + void **, unsigned long *); int (*media_changed) (struct gendisk *); int (*revalidate_disk) (struct gendisk *); int (*getgeo)(struct block_device *, struct hd_geometry *); |