[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, 1 deletions

diff --git a/fs/read_write.c b/fs/read_write.c
index 32d54cca9bd9..4ed839bcb91c 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -22,7 +22,8 @@
 
 const struct file_operations generic_ro_fops = {
         .llseek         = generic_file_llseek,
-        .read           = generic_file_read,
+        .read           = do_sync_read,
+        .aio_read       = generic_file_aio_read,
         .mmap           = generic_file_readonly_mmap,
         .sendfile       = generic_file_sendfile,
 };