Messages in this thread Patch in this message | | | From | Denys Vlasenko <> | Subject | [PATCH] (resend) reuse xxx_fifo_fops for xxx_pipe_fops | Date | Tue, 1 Jul 2008 11:03:02 +0200 |
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Hi Andrew, Al,
I posted this patch a few months ago, but it apparently fell thru cracks. Here we go again.
I noticed that read/write/rdwr_pipe_fops are (1) const and (2) exactly identical to xxx_fifo_fops, which are also const.
Attached patch #defines xxx_pipe_fops as aliases to xxx_fifo_fops. Size difference:
# size linux-2.6.25-rc6*/*/pipe.o text data bss dec hex filename 6534 144 0 6678 1a16 linux-2.6.25-rc6/fs/pipe.o 5862 144 0 6006 1776 linux-2.6.25-rc6-pt/fs/pipe.o
Run-tested on 2.6.26-rc8. Please apply.
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com> -- vda --- linux-2.6.25-rc6.src/fs/pipe.c Sat Mar 22 23:00:34 2008 +++ linux-2.6.25-rc6.pipe/fs/pipe.c Fri Mar 28 15:52:00 2008 @@ -814,42 +814,9 @@ .fasync = pipe_rdwr_fasync, }; -static const struct file_operations read_pipe_fops = { - .llseek = no_llseek, - .read = do_sync_read, - .aio_read = pipe_read, - .write = bad_pipe_w, - .poll = pipe_poll, - .unlocked_ioctl = pipe_ioctl, - .open = pipe_read_open, - .release = pipe_read_release, - .fasync = pipe_read_fasync, -}; - -static const struct file_operations write_pipe_fops = { - .llseek = no_llseek, - .read = bad_pipe_r, - .write = do_sync_write, - .aio_write = pipe_write, - .poll = pipe_poll, - .unlocked_ioctl = pipe_ioctl, - .open = pipe_write_open, - .release = pipe_write_release, - .fasync = pipe_write_fasync, -}; - -static const struct file_operations rdwr_pipe_fops = { - .llseek = no_llseek, - .read = do_sync_read, - .aio_read = pipe_read, - .write = do_sync_write, - .aio_write = pipe_write, - .poll = pipe_poll, - .unlocked_ioctl = pipe_ioctl, - .open = pipe_rdwr_open, - .release = pipe_rdwr_release, - .fasync = pipe_rdwr_fasync, -}; +#define read_pipe_fops read_fifo_fops +#define write_pipe_fops write_fifo_fops +#define rdwr_pipe_fops rdwr_fifo_fops struct pipe_inode_info * alloc_pipe_info(struct inode *inode) { | |