aboutsummaryrefslogtreecommitdiffstats
path: root/include
diff options
context:
space:
mode:
authorJared Hulbert <jaredeh@gmail.com>2008-04-28 05:13:02 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-28 11:58:23 -0400
commit30afcb4bd2762fa4b87b17ada9500aa46dc10b1b (patch)
tree0920f491a37683a8784c146270b98f82a7e0aa2c /include
parent423bad600443c590f34ed7ce357591f76f48f137 (diff)
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.h3
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 {
1178 int (*ioctl) (struct inode *, struct file *, unsigned, unsigned long); 1178 int (*ioctl) (struct inode *, struct file *, unsigned, unsigned long);
1179 long (*unlocked_ioctl) (struct file *, unsigned, unsigned long); 1179 long (*unlocked_ioctl) (struct file *, unsigned, unsigned long);
1180 long (*compat_ioctl) (struct file *, unsigned, unsigned long); 1180 long (*compat_ioctl) (struct file *, unsigned, unsigned long);
1181 int (*direct_access) (struct block_device *, sector_t, unsigned long *); 1181 int (*direct_access) (struct block_device *, sector_t,
1182 void **, unsigned long *);
1182 int (*media_changed) (struct gendisk *); 1183 int (*media_changed) (struct gendisk *);
1183 int (*revalidate_disk) (struct gendisk *); 1184 int (*revalidate_disk) (struct gendisk *);
1184 int (*getgeo)(struct block_device *, struct hd_geometry *); 1185 int (*getgeo)(struct block_device *, struct hd_geometry *);