[PATCH] Streamline generic_file_* interfaces and filemap cleanups

This patch cleans up generic_file_*_read/write() interfaces.  Christoph
Hellwig gave me the idea for this clean ups.

In a nutshell, all filesystems should set .aio_read/.aio_write methods and use
do_sync_read/ do_sync_write() as their .read/.write methods.  This allows us
to cleanup all variants of generic_file_* routines.

Final available interfaces:

generic_file_aio_read() - read handler
generic_file_aio_write() - write handler
generic_file_aio_write_nolock() - no lock write handler

__generic_file_aio_write_nolock() - internal worker routine

Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 2 insertions, 13 deletions

diff --git a/drivers/char/raw.c b/drivers/char/raw.c
index 490db531e2d8..89b718e326e5 100644
--- a/drivers/char/raw.c
+++ b/drivers/char/raw.c
@@ -238,21 +238,10 @@ out:
         return err;
 }
 
-static ssize_t raw_file_write(struct file *file, const char __user *buf,
-                                   size_t count, loff_t *ppos)
-{
-        struct iovec local_iov = {
-                .iov_base = (char __user *)buf,
-                .iov_len = count
-        };
-
-        return generic_file_write_nolock(file, &local_iov, 1, ppos);
-}
-
 static const struct file_operations raw_fops = {
-        .read   =       generic_file_read,
+        .read   =       do_sync_read,
         .aio_read =     generic_file_aio_read,
-        .write  =       raw_file_write,
+        .write  =       do_sync_write,
         .aio_write =    generic_file_aio_write_nolock,
         .open   =       raw_open,
         .release=       raw_release,